The Unified Code for Units of Measure

name print c/s c/i value

yotta Y Y YA 1 × 10²⁴

zetta Z Z ZA 1 × 10²¹

exa E E EX 1 × 10¹⁸

peta P P PT 1 × 10¹⁵

tera T T TR 1 × 10¹²

giga G G GA 1 × 10⁹

mega M M MA 1 × 10⁶

kilo k k K 1 × 10³

hecto h h H 1 × 10²

deka da da DA 1 × 10¹

deci d d D 1 × 10^-1

centi c c C 1 × 10^-2

milli m m M 1 × 10^-3

micro µ u U 1 × 10^-6

nano n n N 1 × 10^-9

pico p p P 1 × 10^-12

femto f f F 1 × 10^-15

atto a a A 1 × 10^-18

zepto z z ZO 1 × 10^-21

yocto y y YO 1 × 10^-24

name	print	c/s	c/i	value
yotta	Y	`Y`	`YA`	1 × 10²⁴
zetta	Z	`Z`	`ZA`	1 × 10²¹
exa	E	`E`	`EX`	1 × 10¹⁸
peta	P	`P`	`PT`	1 × 10¹⁵
tera	T	`T`	`TR`	1 × 10¹²
giga	G	`G`	`GA`	1 × 10⁹
mega	M	`M`	`MA`	1 × 10⁶
kilo	k	`k`	`K`	1 × 10³
hecto	h	`h`	`H`	1 × 10²
deka	da	`da`	`DA`	1 × 10¹
deci	d	`d`	`D`	1 × 10^-1
centi	c	`c`	`C`	1 × 10^-2
milli	m	`m`	`M`	1 × 10^-3
micro	µ	`u`	`U`	1 × 10^-6
nano	n	`n`	`N`	1 × 10^-9
pico	p	`p`	`P`	1 × 10^-12
femto	f	`f`	`F`	1 × 10^-15
atto	a	`a`	`A`	1 × 10^-18
zepto	z	`z`	`ZO`	1 × 10^-21
yocto	y	`y`	`YO`	1 × 10^-24

2 Base Units

name kind of quantity print c/s c/i

meter length m m M

gram mass g g G

second time s s S

radian plane angle rad rad RAD

Kelvin temperature K K K

Coulomb electric charge C C C

candela luminous intensity cd cd CD

name	kind of quantity	print	c/s	c/i
meter	length	m	`m`	`M`
gram	mass	g	`g`	`G`
second	time	s	`s`	`S`
radian	plane angle	rad	`rad`	`RAD`
Kelvin	temperature	K	`K`	`K`
Coulomb	electric charge	C	`C`	`C`
candela	luminous intensity	cd	`cd`	`CD`

3 Derived Units

3.1 Dimensionless "Units"

name print c/s c/i M value definition

ten, for arbitrary powers 10ⁿ 10* 10* N 10 1

the number pi [pi] [PI] N 1

percent % % % N 1 10*-2

parts per thousand ppth [ppth] [PPTH] N 1 10*-3

parts per million ppm [ppm] [PPM] N 1 10*-6

parts per billion ppb [ppb] [PPB] N 1 10*-9

parts per trillion pptr [pptr] [PPTR] N 1 10*-12

name	print	c/s	c/i	M	value	definition
ten, for arbitrary powers	10ⁿ	`10*`	`10*`	N	10	`1`
the number pi		`[pi]`	`[PI]`	N		`1`
percent	%	`%`	`%`	N	1	`10*-2`
parts per thousand	ppth	`[ppth]`	`[PPTH]`	N	1	`10*-3`
parts per million	ppm	`[ppm]`	`[PPM]`	N	1	`10*-6`
parts per billion	ppb	`[ppb]`	`[PPB]`	N	1	`10*-9`
parts per trillion	pptr	`[pptr]`	`[PPTR]`	N	1	`10*-12`

3.2 Système International (SI)

name kind of quantity print c/s c/i M value definition

mole amount of substance mol mol MOL Y 6.0221367 10*23

streadian solid angle sr sr SR Y 1 rad2

Herz frequency Hz Hz HZ Y 1 s-1

Newton force N N N Y 1 kg.m/s2

Pascal pressure Pa Pa PAL Y 1 N/m2

Joule energy J J J Y 1 N.m

Watt power W W W Y 1 J/s

Ampère electric current A A A Y 1 C/s

Volt el. potential V V V Y 1 J/C

Farad el. capacitance F F F Y 1 C/V

Ohm el. resistance Ohm OHM Y 1 V/A

Siemens el. conductance S S SIE Y 1 Ohm-1

Weber magentic flux Wb Wb WB Y 1 V.s

degree Celsius temperature °C Cel CEL Y * cel(1 K)

Tesla mag. flux density T T T Y 1 Wb/m2

Henry inductance H H H Y 1 Wb/A

lumen luminous flux lm lm LM Y 1 cd.sr

lux illuminance lx lx LX Y 1 lm/m2

Becquerel radioactivity Bq Bq BQ Y 1 s-1

Gray energy dose Gy Gy GY Y 1 J/kg

Sievert dose equivalent Sv Sv SV Y 1 J/kg

name	kind of quantity	print	c/s	c/i	M	value	definition
mole	amount of substance	mol	`mol`	`MOL`	Y	6.0221367	`10*23`
streadian	solid angle	sr	`sr`	`SR`	Y	1	`rad2`
Herz	frequency	Hz	`Hz`	`HZ`	Y	1	`s-1`
Newton	force	N	`N`	`N`	Y	1	`kg.m/s2`
Pascal	pressure	Pa	`Pa`	`PAL`	Y	1	`N/m2`
Joule	energy	J	`J`	`J`	Y	1	`N.m`
Watt	power	W	`W`	`W`	Y	1	`J/s`
Ampère	electric current	A	`A`	`A`	Y	1	`C/s`
Volt	el. potential	V	`V`	`V`	Y	1	`J/C`
Farad	el. capacitance	F	`F`	`F`	Y	1	`C/V`
Ohm	el. resistance		`Ohm`	`OHM`	Y	1	`V/A`
Siemens	el. conductance	S	`S`	`SIE`	Y	1	`Ohm-1`
Weber	magentic flux	Wb	`Wb`	`WB`	Y	1	`V.s`
degree Celsius	temperature	°C	`Cel`	`CEL`	Y	*	`cel(1 K)`
Tesla	mag. flux density	T	`T`	`T`	Y	1	`Wb/m2`
Henry	inductance	H	`H`	`H`	Y	1	`Wb/A`
lumen	luminous flux	lm	`lm`	`LM`	Y	1	`cd.sr`
lux	illuminance	lx	`lx`	`LX`	Y	1	`lm/m2`
Becquerel	radioactivity	Bq	`Bq`	`BQ`	Y	1	`s-1`
Gray	energy dose	Gy	`Gy`	`GY`	Y	1	`J/kg`
Sievert	dose equivalent	Sv	`Sv`	`SV`	Y	1	`J/kg`

3.3 Other Units from ISO 1000

name kind of quantity print c/s c/i M value definition

gon (grade) plane angle ^g gon GON N 0.9 deg

degree plane angle ° deg DEG N 2 [pi].rad/360

minute plane angle ' ' ' N 1 deg/60

second plane angle '' '' '' N 1 '/60

liter volume l l L Y 1 dm3

L L Y 1 l

are area a ar AR Y 100 m2

minute time min min MIN N 60 s

hour time h h HR N 60 min

day time d d D N 24 h

year (tropical) time a_t a_t ANN_T N 365.24219 d

year (mean Julian) time a_j a_j ANN_J N 365.25 d

year (mean Gregorian) time a_g a_g ANN_G N 365.2425 d

year time a a ANN N 1 a_j

week time wk wk WK N 7 d

month (synodal) time mo_s mo_s MO_S N 29.53059 d

month (Julian) time mo_j mo_j MO_J N 1 a_j/12

month (Gregorian) time mo_g mo_g MO_G N 1 a_g/12

month time mo mo MO N 1 mo_j

tonne mass t t TNE Y 1 × 10³ kg

bar pressure bar bar BAR Y 1 × 10⁵ Pa

unified atomic mass unit mass u u AMU Y 1.6605402 × 10^-24 g

electronvolt energy eV eV EV Y 1 [e].V

astronomic unit length AU AU ASU N 149597.870 Mm

parsec length pc pc PRS Y 3.085678 × 10¹⁶ m

name	kind of quantity	print	c/s	c/i	M	value	definition
gon (grade)	plane angle	^g	`gon`	`GON`	N	0.9	`deg`
degree	plane angle	°	`deg`	`DEG`	N	2	`[pi].rad/360`
minute	plane angle	'	`'`	`'`	N	1	`deg/60`
second	plane angle	''	`''`	`''`	N	1	`'/60`
liter	volume	l	`l`	`L`	Y	1	`dm3`
		L	`L`		Y	1	`l`
are	area	a	`ar`	`AR`	Y	100	`m2`
minute	time	min	`min`	`MIN`	N	60	`s`
hour	time	h	`h`	`HR`	N	60	`min`
day	time	d	`d`	`D`	N	24	`h`
year (tropical)	time	a_t	`a_t`	`ANN_T`	N	365.24219	`d`
year (mean Julian)	time	a_j	`a_j`	`ANN_J`	N	365.25	`d`
year (mean Gregorian)	time	a_g	`a_g`	`ANN_G`	N	365.2425	`d`
year	time	a	`a`	`ANN`	N	1	`a_j`
week	time	wk	`wk`	`WK`	N	7	`d`
month (synodal)	time	mo_s	`mo_s`	`MO_S`	N	29.53059	`d`
month (Julian)	time	mo_j	`mo_j`	`MO_J`	N	1	`a_j/12`
month (Gregorian)	time	mo_g	`mo_g`	`MO_G`	N	1	`a_g/12`
month	time	mo	`mo`	`MO`	N	1	`mo_j`
tonne	mass	t	`t`	`TNE`	Y	1 × 10³	`kg`
bar	pressure	bar	`bar`	`BAR`	Y	1 × 10⁵	`Pa`
unified atomic mass unit	mass	u	`u`	`AMU`	Y	1.6605402 × 10^-24	`g`
electronvolt	energy	eV	`eV`	`EV`	Y	1	`[e].V`
astronomic unit	length	AU	`AU`	`ASU`	N	149597.870	`Mm`
parsec	length	pc	`pc`	`PRS`	Y	3.085678 × 10¹⁶	`m`

3.4 Natural Units (Constants)

name kind of quantity print c/s c/i M value definition

velocity of light velocity c [c] [C] Y 299792458 m/s

Planck constant h [h] [H] Y 6.6260755 × 10^-34 J.s

Boltzman constant k [k] [K] Y 1.380658 × 10^-23 J/K

permittivity of vacuum ₀ [eps_0] [eps_0] Y 8.854187817 × 10^-12 F/m

permeability of vacuum µ₀ [mu_0] [mu_0] Y 1 4.[pi].10*-7.N/A2

elementary charge el. charge e [e] [E] Y 1.60217733 × 10^-19 C

electron mass mass m_e [m_e] [M_E] Y 9.1093897 × 10^-28 g

proton mass mass m_p [m_p] [M_P] Y 1.6726231 × 10^-24 g

Newtonian constant of gravitation G [G] [GC] Y 6.67259 × 10^-11 m3.kg-1.s-2

acceleration of free fall (standard) acceleration g_n [g] [G] Y 9.80665 m/s2

atmosphere (standard) pressure atm atm ATM N 101325 Pa

light-year length l.y. [ly] [LY] Y 1 [c].a_j

gram-force force gf gf GF Y 1 g.[g]

pound force force lbf [lbf_av] [LBF_AV] N 1 [lb_av].[g]

name	kind of quantity	print	c/s	c/i	M	value	definition
velocity of light	velocity	c	`[c]`	`[C]`	Y	299792458	`m/s`
Planck constant		h	`[h]`	`[H]`	Y	6.6260755 × 10^-34	`J.s`
Boltzman constant		k	`[k]`	`[K]`	Y	1.380658 × 10^-23	`J/K`
permittivity of vacuum		₀	`[eps_0]`	`[eps_0]`	Y	8.854187817 × 10^-12	`F/m`
permeability of vacuum		µ₀	`[mu_0]`	`[mu_0]`	Y	1	`4.[pi].10*-7.N/A2`
elementary charge	el. charge	e	`[e]`	`[E]`	Y	1.60217733 × 10^-19	`C`
electron mass	mass	m_e	`[m_e]`	`[M_E]`	Y	9.1093897 × 10^-28	`g`
proton mass	mass	m_p	`[m_p]`	`[M_P]`	Y	1.6726231 × 10^-24	`g`
Newtonian constant of gravitation		G	`[G]`	`[GC]`	Y	6.67259 × 10^-11	`m3.kg-1.s-2`
acceleration of free fall (standard)	acceleration	g_n	`[g]`	`[G]`	Y	9.80665	`m/s2`
atmosphere (standard)	pressure	atm	`atm`	`ATM`	N	101325	`Pa`
light-year	length	l.y.	`[ly]`	`[LY]`	Y	1	`[c].a_j`
gram-force	force	gf	`gf`	`GF`	Y	1	`g.[g]`
pound force	force	lbf	`[lbf_av]`	`[LBF_AV]`	N	1	`[lb_av].[g]`

3.5 CGS Units

name kind of quantity print c/s c/i M value definition

Kayser (lineic number) K Ky KY Y 1 cm-1

Gal acceleration Gal Gal GL Y 1 cm/s2

dyne force dyn dyn DYN Y 1 g.cm/s2

erg energy erg erg ERG Y 1 dyn.cm

Poise dynamic viscosity P P P Y 1 dyn.s/cm2

Biot electric current Bi Bi BI Y 10 A

Stokes kinematic viscosity St St ST Y 1 cm2/s

Maxwell flux of magnetic induction Mx Mx MX Y 1 × 10^-8 Wb

Gauss mag. flux density Gs, G G GS Y 1 × 10^-4 T

Oersted mag. field intensity Oe Oe OE Y 250 /[pi].A/m

Gilbert mag. tension Gb Gb GB Y 1 Oe.cm

stilb lum. intensity density sb sb SB Y 1 cd/cm2

Lambert brightness L Lmb LMB Y 1 cd/cm2/[pi]

phot illuminance ph ph PHT Y 1 × 10^-4 lx

Curie radioactivity Ci Ci CI Y 3.7 × 10¹⁰ Bq

Roentgen ion dose R R ROE Y 2.58 × 10^-4 C/kg

radiation absorbed dose energy dose RAD RAD [RAD] Y 100 erg/g

radiation equivalent man dose equivalent REM REM [REM] Y 1 RAD

name	kind of quantity	print	c/s	c/i	M	value	definition
Kayser	(lineic number)	K	`Ky`	`KY`	Y	1	`cm-1`
Gal	acceleration	Gal	`Gal`	`GL`	Y	1	`cm/s2`
dyne	force	dyn	`dyn`	`DYN`	Y	1	`g.cm/s2`
erg	energy	erg	`erg`	`ERG`	Y	1	`dyn.cm`
Poise	dynamic viscosity	P	`P`	`P`	Y	1	`dyn.s/cm2`
Biot	electric current	Bi	`Bi`	`BI`	Y	10	`A`
Stokes	kinematic viscosity	St	`St`	`ST`	Y	1	`cm2/s`
Maxwell	flux of magnetic induction	Mx	`Mx`	`MX`	Y	1 × 10^-8	`Wb`
Gauss	mag. flux density	Gs, G	`G`	`GS`	Y	1 × 10^-4	`T`
Oersted	mag. field intensity	Oe	`Oe`	`OE`	Y	250	`/[pi].A/m`
Gilbert	mag. tension	Gb	`Gb`	`GB`	Y	1	`Oe.cm`
stilb	lum. intensity density	sb	`sb`	`SB`	Y	1	`cd/cm2`
Lambert	brightness	L	`Lmb`	`LMB`	Y	1	`cd/cm2/[pi]`
phot	illuminance	ph	`ph`	`PHT`	Y	1 × 10^-4	`lx`
Curie	radioactivity	Ci	`Ci`	`CI`	Y	3.7 × 10¹⁰	`Bq`
Roentgen	ion dose	R	`R`	`ROE`	Y	2.58 × 10^-4	`C/kg`
radiation absorbed dose	energy dose	RAD	`RAD`	`[RAD]`	Y	100	`erg/g`
radiation equivalent man	dose equivalent	REM	`REM`	`[REM]`	Y	1	`RAD`

3.6 Customary Units

3.6.1 International Customary Units

name kind of quantity print c/s c/i M value definition

inch length in, '' [in_i] [IN_I] N 2.54 cm

foot length ft, ' [ft_i] [FT_I] N 12 [in_i]

yard length yd [yd_i] [YD_I] N 3 [ft_i]

statute mile length mi [mi_i] [MI_I] N 5280 [ft_i]

fathom depth of water fth [fth_i] [FTH_I] N 6 [ft_i]

nautic mile length n.mi [nmi_i] [NMI_I] N 1852 m

knot velocity knot [kn_i] [KN_I] N 1 [nmi_i]/h

square inch area [sin_i] [SIN_I] N 1 [in_i]2

square foot area [sft_i] [SFT_I] N 1 [ft_i]2

square yard area [syd_i] [SYD_I] N 1 [yd_i]2

cubic inch volume [cin_i] [CIN_I] N 1 [in_i]3

cubic foot volume [cft_i] [CFT_I] N 1 [ft_i]3

cubic yard volume cu.yd [cyd_i] [CYD_I] N 1 [yd_i]3

board foot volume [bf_i] [BF_I] N 144 [in_i]3

cord volume [cr_i] [CR_I] N 128 [ft_i]3

mil length mil [mil_i] [MIL_I] N 1 × 10^-3 [in_i]

circular mil area circ.mil [cml_i] [CML_I] N 1 [pi]/4.[mil_i]2

hand height of horses hd [hd_i] [HD_I] N 4 [in_i]

name	kind of quantity	print	c/s	c/i	M	value	definition
inch	length	in, ''	`[in_i]`	`[IN_I]`	N	2.54	`cm`
foot	length	ft, '	`[ft_i]`	`[FT_I]`	N	12	`[in_i]`
yard	length	yd	`[yd_i]`	`[YD_I]`	N	3	`[ft_i]`
statute mile	length	mi	`[mi_i]`	`[MI_I]`	N	5280	`[ft_i]`
fathom	depth of water	fth	`[fth_i]`	`[FTH_I]`	N	6	`[ft_i]`
nautic mile	length	n.mi	`[nmi_i]`	`[NMI_I]`	N	1852	`m`
knot	velocity	knot	`[kn_i]`	`[KN_I]`	N	1	`[nmi_i]/h`
square inch	area		`[sin_i]`	`[SIN_I]`	N	1	`[in_i]2`
square foot	area		`[sft_i]`	`[SFT_I]`	N	1	`[ft_i]2`
square yard	area		`[syd_i]`	`[SYD_I]`	N	1	`[yd_i]2`
cubic inch	volume		`[cin_i]`	`[CIN_I]`	N	1	`[in_i]3`
cubic foot	volume		`[cft_i]`	`[CFT_I]`	N	1	`[ft_i]3`
cubic yard	volume	cu.yd	`[cyd_i]`	`[CYD_I]`	N	1	`[yd_i]3`
board foot	volume		`[bf_i]`	`[BF_I]`	N	144	`[in_i]3`
cord	volume		`[cr_i]`	`[CR_I]`	N	128	`[ft_i]3`
mil	length	mil	`[mil_i]`	`[MIL_I]`	N	1 × 10^-3	`[in_i]`
circular mil	area	circ.mil	`[cml_i]`	`[CML_I]`	N	1	`[pi]/4.[mil_i]2`
hand	height of horses	hd	`[hd_i]`	`[HD_I]`	N	4	`[in_i]`

3.6.2 U.S. Survey Lengths

name kind of quantity print c/s c/i M value definition

foot length ft_us [ft_us] [FT_US] N 1200 m/3937

yard length [yd_us] [YD_US] N 3 [ft_us]

inch length [in_us] [IN_US] N 1 [ft_us]/12

rod length [rd_us] [RD_US] N 16.5 [ft_us]

chain (Gunter's or Surveyor's) length [ch_us] [CH_US] N 4 [rd_us]

link (for Gunter's chain) length [lk_us] [LK_US] N 1 [ch_us]/100

chain (Ramden's or Engineer's) length [rch_us] [RCH_US] N 100 [ft_us]

link (for Ramden's chain) length [rlk_us] [RLK_US] N 1 [rch_us]/100

fathom length [fth_us] [FTH_US] N 6 [ft_us]

furlong length [fur_us] [FUR_US] N 40 [rd_us]

mile length [mi_us] [MI_US] N 8 [fur_us]

acre area [acr_us] [ACR_US] N 160 [rd_us]2

square rod area [srd_us] [SRD_US] N 1 [rd_us]2

square mile area [smi_us] [SMI_US] N 1 [mi_us]2

section area [sct] [SCT] N 1 [mi_us]2

township area [twp] [TWP] N 36 [sct]

mil length [mil_us] [MIL_US] N 1 × 10^-3 [in_us]

name	kind of quantity	print	c/s	c/i	M	value	definition
foot	length	ft_us	`[ft_us]`	`[FT_US]`	N	1200	`m/3937`
yard	length		`[yd_us]`	`[YD_US]`	N	3	`[ft_us]`
inch	length		`[in_us]`	`[IN_US]`	N	1	`[ft_us]/12`
rod	length		`[rd_us]`	`[RD_US]`	N	16.5	`[ft_us]`
chain (Gunter's or Surveyor's)	length		`[ch_us]`	`[CH_US]`	N	4	`[rd_us]`
link (for Gunter's chain)	length		`[lk_us]`	`[LK_US]`	N	1	`[ch_us]/100`
chain (Ramden's or Engineer's)	length		`[rch_us]`	`[RCH_US]`	N	100	`[ft_us]`
link (for Ramden's chain)	length		`[rlk_us]`	`[RLK_US]`	N	1	`[rch_us]/100`
fathom	length		`[fth_us]`	`[FTH_US]`	N	6	`[ft_us]`
furlong	length		`[fur_us]`	`[FUR_US]`	N	40	`[rd_us]`
mile	length		`[mi_us]`	`[MI_US]`	N	8	`[fur_us]`
acre	area		`[acr_us]`	`[ACR_US]`	N	160	`[rd_us]2`
square rod	area		`[srd_us]`	`[SRD_US]`	N	1	`[rd_us]2`
square mile	area		`[smi_us]`	`[SMI_US]`	N	1	`[mi_us]2`
section	area		`[sct]`	`[SCT]`	N	1	`[mi_us]2`
township	area		`[twp]`	`[TWP]`	N	36	`[sct]`
mil	length		`[mil_us]`	`[MIL_US]`	N	1 × 10^-3	`[in_us]`

3.6.3 British Imperial Lengths

name kind of quantity print c/s c/i M value definition

inch length [in_br] [IN_BR] N 2.539998 cm

foot length [ft_br] [FT_BR] N 12 [in_br]

foot length [rd_br] [RD_BR] N 16.5 [ft_br]

chain (Gunter's chain) length [ch_br] [CH_BR] N 4 [rd_br]

link (for Gunter's chain) length [lk_br] [LK_BR] N 1 [ch_br]/100

fathom length [fth_br] [FTH_BR] N 6 [ft_br]

pace length [pc_br] [PC_BR] N 2.5 [ft_br]

yard length [yd_br] [YD_BR] N 3 [ft_br]

mile length [mi_br] [MI_BR] N 5280 [ft_br]

nautic mile length [nmi_br] [NMI_BR] N 6080 [ft_br]

knot velocity [kn_br] [KN_BR] N 1 [nmi_br]/h

acre area [acr_br] [ACR_BR] N 4840 [yd_br]2

name	kind of quantity	c/s	c/i	M	value	definition
inch	length	`[in_br]`	`[IN_BR]`	N	2.539998	`cm`
foot	length	`[ft_br]`	`[FT_BR]`	N	12	`[in_br]`
foot	length	`[rd_br]`	`[RD_BR]`	N	16.5	`[ft_br]`
chain (Gunter's chain)	length	`[ch_br]`	`[CH_BR]`	N	4	`[rd_br]`
link (for Gunter's chain)	length	`[lk_br]`	`[LK_BR]`	N	1	`[ch_br]/100`
fathom	length	`[fth_br]`	`[FTH_BR]`	N	6	`[ft_br]`
pace	length	`[pc_br]`	`[PC_BR]`	N	2.5	`[ft_br]`
yard	length	`[yd_br]`	`[YD_BR]`	N	3	`[ft_br]`
mile	length	`[mi_br]`	`[MI_BR]`	N	5280	`[ft_br]`
nautic mile	length	`[nmi_br]`	`[NMI_BR]`	N	6080	`[ft_br]`
knot	velocity	`[kn_br]`	`[KN_BR]`	N	1	`[nmi_br]/h`
acre	area	`[acr_br]`	`[ACR_BR]`	N	4840	`[yd_br]2`

3.6.4 U.S. Capacity and Dry Measures (Volumes)

name kind of quantity print c/s c/i M value definition

gallon (Queen Anne's wine gallon) volume (fluid) [gal_us] [GAL_US] N 231 [in_i]3

barrel volume (fluid) [bbl_us] [BBL_US] N 42 [gal_us]

quart volume (fluid) [qt_us] [QT_US] N 1 [gal_us]/4

pint volume (fluid) [pt_us] [PT_US] N 1 [qt_us]/2

gill volume (fluid) [gil_us] [GIL_US] N 1 [pt_us]/4

fluid ounce volume (fluid) oz fl [foz_us] [FOZ_US] N 1 [gil_us]/4

fluid dram volume (fluid) [fdr_us] [FDR_US] N 1 [foz_us]/8

minim volume (fluid) [min_us] [MIN_US] N 1 [fdr_us]/60

cord volume (fluid) [crd_us] [CRD_US] N 128 [ft_i]3

bushel volume (dry) [bu_us] [BU_US] N 2150.42 [in_i]3

winchester gallon (historical) volume (dry) [gal_wi] [GAL_WI] N 1 [bu_us]/8

peck volume (dry) [pk_us] [PK_US] N 1 [bu_us]/4

dry quart volume (dry) [dqt_us] [DQT_US] N 1 [pk_us]/8

dry pint volume (dry) [dpt_us] [DPT_US] N 1 [dqt_us]/2

tablespoon volume [tbs_us] [TBS_US] N 1 [foz_us]/2

teaspoon volume [tsp_us] [TSP_US] N 1 [tbs_us]/3

cup volume [cup_us] [CUP_US] N 16 [tbs_us]

name	kind of quantity	print	c/s	c/i	M	value	definition
gallon (Queen Anne's wine gallon)	volume (fluid)		`[gal_us]`	`[GAL_US]`	N	231	`[in_i]3`
barrel	volume (fluid)		`[bbl_us]`	`[BBL_US]`	N	42	`[gal_us]`
quart	volume (fluid)		`[qt_us]`	`[QT_US]`	N	1	`[gal_us]/4`
pint	volume (fluid)		`[pt_us]`	`[PT_US]`	N	1	`[qt_us]/2`
gill	volume (fluid)		`[gil_us]`	`[GIL_US]`	N	1	`[pt_us]/4`
fluid ounce	volume (fluid)	oz fl	`[foz_us]`	`[FOZ_US]`	N	1	`[gil_us]/4`
fluid dram	volume (fluid)		`[fdr_us]`	`[FDR_US]`	N	1	`[foz_us]/8`
minim	volume (fluid)		`[min_us]`	`[MIN_US]`	N	1	`[fdr_us]/60`
cord	volume (fluid)		`[crd_us]`	`[CRD_US]`	N	128	`[ft_i]3`
bushel	volume (dry)		`[bu_us]`	`[BU_US]`	N	2150.42	`[in_i]3`
winchester gallon (historical)	volume (dry)		`[gal_wi]`	`[GAL_WI]`	N	1	`[bu_us]/8`
peck	volume (dry)		`[pk_us]`	`[PK_US]`	N	1	`[bu_us]/4`
dry quart	volume (dry)		`[dqt_us]`	`[DQT_US]`	N	1	`[pk_us]/8`
dry pint	volume (dry)		`[dpt_us]`	`[DPT_US]`	N	1	`[dqt_us]/2`
tablespoon	volume		`[tbs_us]`	`[TBS_US]`	N	1	`[foz_us]/2`
teaspoon	volume		`[tsp_us]`	`[TSP_US]`	N	1	`[tbs_us]/3`
cup	volume		`[cup_us]`	`[CUP_US]`	N	16	`[tbs_us]`

3.6.5 British Imperial Volumes

name kind of quantity print c/s c/i M value definition

gallon volume [gal_br] [GAL_BR] N 4.54609 l

bushel volume [pk_br] [PK_BR] N 2 [gal_br]

peck volume [bu_br] [BU_BR] N 4 [pk_br]

quart volume [qt_br] [QT_BR] N 1 [gal_br]/4

pint volume [pt_br] [PT_BR] N 1 [qt_br]/2

gill volume [gil_br] [GIL_BR] N 1 [pt_br]/4

fluid ounce volume [foz_br] [FOZ_BR] N 1 [gil_br]/5

fluid dram volume [fdr_br] [FDR_BR] N 1 [foz_br]/8

minim volume [min_br] [MIN_BR] N 1 [fdr_br]/60

name	kind of quantity	c/s	c/i	M	value	definition
gallon	volume	`[gal_br]`	`[GAL_BR]`	N	4.54609	`l`
bushel	volume	`[pk_br]`	`[PK_BR]`	N	2	`[gal_br]`
peck	volume	`[bu_br]`	`[BU_BR]`	N	4	`[pk_br]`
quart	volume	`[qt_br]`	`[QT_BR]`	N	1	`[gal_br]/4`
pint	volume	`[pt_br]`	`[PT_BR]`	N	1	`[qt_br]/2`
gill	volume	`[gil_br]`	`[GIL_BR]`	N	1	`[pt_br]/4`
fluid ounce	volume	`[foz_br]`	`[FOZ_BR]`	N	1	`[gil_br]/5`
fluid dram	volume	`[fdr_br]`	`[FDR_BR]`	N	1	`[foz_br]/8`
minim	volume	`[min_br]`	`[MIN_BR]`	N	1	`[fdr_br]/60`

3.6.6 Avoirdupois Weights

name kind of quantity print c/s c/i M value definition

grain mass [gr] [GR] N 64.79891 mg

pound mass lb [lb_av] [LB_AV] N 7000 [gr]

ounce mass oz [oz_av] [OZ_AV] N 1 [lb_av]/16

dram mass [dr_av] [DR_AV] N 1 [oz_av]/16

short hundredweight (U.S.) mass [scwt_av] [SCWT_AV] N 100 [lb_av]

long hunderdweight (British) mass [lcwt_av] [LCWT_AV] N 112 [lb_av]

short ton (U.S.) mass [ston_av] [STON_AV] N 20 [scwt_av]

long ton (British) mass [lton_av] [LTON_AV] N 20 [lcwt_av]

stone (British) mass [stone_av] [STONE_AV] N 14 [lb_av]

name	kind of quantity	print	c/s	c/i	M	value	definition
grain	mass		`[gr]`	`[GR]`	N	64.79891	`mg`
pound	mass	lb	`[lb_av]`	`[LB_AV]`	N	7000	`[gr]`
ounce	mass	oz	`[oz_av]`	`[OZ_AV]`	N	1	`[lb_av]/16`
dram	mass		`[dr_av]`	`[DR_AV]`	N	1	`[oz_av]/16`
short hundredweight (U.S.)	mass		`[scwt_av]`	`[SCWT_AV]`	N	100	`[lb_av]`
long hunderdweight (British)	mass		`[lcwt_av]`	`[LCWT_AV]`	N	112	`[lb_av]`
short ton (U.S.)	mass		`[ston_av]`	`[STON_AV]`	N	20	`[scwt_av]`
long ton (British)	mass		`[lton_av]`	`[LTON_AV]`	N	20	`[lcwt_av]`
stone (British)	mass		`[stone_av]`	`[STONE_AV]`	N	14	`[lb_av]`

3.6.7 Troy Weights

name kind of quantity print c/s c/i M value definition

pennyweight mass [pwt_tr] [PWT_TR] N 24 [gr]

ounce mass [oz_tr] [OZ_TR] N 20 [pwt_tr]

pound mass [lb_tr] [LB_TR] N 12 [oz_tr]

name	kind of quantity	c/s	c/i	M	value	definition
pennyweight	mass	`[pwt_tr]`	`[PWT_TR]`	N	24	`[gr]`
ounce	mass	`[oz_tr]`	`[OZ_TR]`	N	20	`[pwt_tr]`
pound	mass	`[lb_tr]`	`[LB_TR]`	N	12	`[oz_tr]`

3.6.8 Apotecaries' Weights

name kind of quantity print c/s c/i M value definition

scruple mass [sc_ap] [SC_AP] N 20 [gr]

dram (drachm) mass [dr_ap] [DR_AP] N 3 [sc_ap]

ounce mass [oz_ap] [OZ_AP] N 8 [dr_ap]

pound mass [lb_ap] [LB_AP] N 12 [oz_ap]

name	kind of quantity	c/s	c/i	M	value	definition
scruple	mass	`[sc_ap]`	`[SC_AP]`	N	20	`[gr]`
dram (drachm)	mass	`[dr_ap]`	`[DR_AP]`	N	3	`[sc_ap]`
ounce	mass	`[oz_ap]`	`[OZ_AP]`	N	8	`[dr_ap]`
pound	mass	`[lb_ap]`	`[LB_AP]`	N	12	`[oz_ap]`

3.7 Units Used in Typesetting

name kind of quantity print c/s c/i M value definition

line length [lne] [LNE] N 1 [in_i]/12

point length [pnt] [PNT] N 1 [lne]/6

pica length [pca] [PCA] N 12 [pnt]

Printer's point length [pnt_pr] [PNT_PR] N 0.013837 [in_i]

Printer's pica length [pca_pr] [PCA_PR] N 12 [pnt_pr]

pied (French foot) length [pied] [PIED] N 32.48 cm

pouce (French inch) length [pouce] [POUCE] N 1 [pied]/12

ligne (French line) length [ligne] [LIGNE] N 1 [pouce]/12

didot (Didot's point) length [didot] [DIDOT] N 1 [ligne]/6

cicero (Didot's pica) length [cicero] [CICERO] N 12 [didot]

name	kind of quantity	c/s	c/i	M	value	definition
line	length	`[lne]`	`[LNE]`	N	1	`[in_i]/12`
point	length	`[pnt]`	`[PNT]`	N	1	`[lne]/6`
pica	length	`[pca]`	`[PCA]`	N	12	`[pnt]`
Printer's point	length	`[pnt_pr]`	`[PNT_PR]`	N	0.013837	`[in_i]`
Printer's pica	length	`[pca_pr]`	`[PCA_PR]`	N	12	`[pnt_pr]`
pied (French foot)	length	`[pied]`	`[PIED]`	N	32.48	`cm`
pouce (French inch)	length	`[pouce]`	`[POUCE]`	N	1	`[pied]/12`
ligne (French line)	length	`[ligne]`	`[LIGNE]`	N	1	`[pouce]/12`
didot (Didot's point)	length	`[didot]`	`[DIDOT]`	N	1	`[ligne]/6`
cicero (Didot's pica)	length	`[cicero]`	`[CICERO]`	N	12	`[didot]`

3.8 Other Units for Heat and Temperature

name kind of quantity print c/s c/i M value definition

degree Fahrenheit temperature °F [degF] [DEGF] N * degf(5 K/9)

calorie (15 °C) energy cal_15°C cal_[15] CAL_[15] Y 4.18580 J

calorie (20 °C) energy cal_20°C cal_[20] CAL_[20] Y 4.18190 J

calorie (mean) energy cal_m cal_m CAL_M Y 4.19002 J

calorie (intl. table) energy cal_IT cal_IT CAL_IT Y 4.1868 J

calorie (thermochemical) energy cal_th cal_th CAL_TH Y 4.184 J

calorie (usual) energy cal cal CAL Y 1 cal_th

Calorie (nutrition) energy Cal [Cal] [CAL] N 1 kcal_th

British thermal unit (39 °F) energy Btu_39°F [Btu_39] [BTU_39] N 1.05967 kJ

Btu (59 °F) energy Btu_59°F [Btu_59] [BTU_59] N 1.05480 kJ

Btu (60 °F) energy Btu_60°F [Btu_60] [BTU_60] N 1.05468 kJ

Btu (mean) energy Btu_m [Btu_m] [BTU_M] N 1.05587 kJ

Btu (intl. table) energy Btu_IT [Btu_IT] [BTU_IT] N 1.05505585262 kJ

Btu (thermochemical) energy Btu_th [Btu_th] [BTU_TH] N 1.054350 kJ

Btu (usual) energy btu [Btu] [BTU] N 1 [Btu_th]

horsepower power [HP] [HP] N 550 [ft_i].[lbf_av]/s

name	kind of quantity	print	c/s	c/i	M	value	definition
degree Fahrenheit	temperature	°F	`[degF]`	`[DEGF]`	N	*	`degf(5 K/9)`
calorie (15 °C)	energy	cal_15°C	`cal_[15]`	`CAL_[15]`	Y	4.18580	`J`
calorie (20 °C)	energy	cal_20°C	`cal_[20]`	`CAL_[20]`	Y	4.18190	`J`
calorie (mean)	energy	cal_m	`cal_m`	`CAL_M`	Y	4.19002	`J`
calorie (intl. table)	energy	cal_IT	`cal_IT`	`CAL_IT`	Y	4.1868	`J`
calorie (thermochemical)	energy	cal_th	`cal_th`	`CAL_TH`	Y	4.184	`J`
calorie (usual)	energy	cal	`cal`	`CAL`	Y	1	`cal_th`
Calorie (nutrition)	energy	Cal	`[Cal]`	`[CAL]`	N	1	`kcal_th`
British thermal unit (39 °F)	energy	Btu_39°F	`[Btu_39]`	`[BTU_39]`	N	1.05967	`kJ`
Btu (59 °F)	energy	Btu_59°F	`[Btu_59]`	`[BTU_59]`	N	1.05480	`kJ`
Btu (60 °F)	energy	Btu_60°F	`[Btu_60]`	`[BTU_60]`	N	1.05468	`kJ`
Btu (mean)	energy	Btu_m	`[Btu_m]`	`[BTU_M]`	N	1.05587	`kJ`
Btu (intl. table)	energy	Btu_IT	`[Btu_IT]`	`[BTU_IT]`	N	1.05505585262	`kJ`
Btu (thermochemical)	energy	Btu_th	`[Btu_th]`	`[BTU_TH]`	N	1.054350	`kJ`
Btu (usual)	energy	btu	`[Btu]`	`[BTU]`	N	1	`[Btu_th]`
horsepower	power		`[HP]`	`[HP]`	N	550	`[ft_i].[lbf_av]/s`

3.9 Units Used in Clinical Medicine

name kind of quantity print c/s c/i M value definition

meter of water column pressure m H₂O m[H2O] M[H2O] Y 9.80665 kPa

meter of mercury column pressure m Hg m[Hg] M[HG] Y 133.3220 kPa

inch of water column pressure in H₂O [in_i'H2O] [IN_I'H2O] N 1 m[H2O].[in_i]/m

inch of mercury column pressure in Hg [in_i'Hg] [IN_i'HG] N 1 m[Hg].[in_i]/m

peripheral vascular resistance unit P.R.U. [PRU] [PRU] N 1 mm[Hg].s/ml

diopter refraction of a lens dpt [diop] [DIOP] N 1 /m

mesh (lineic number) [mesh_i] [MESH_I] N 1 /[in_i]

Charrière (french) gauge of catheters Ch [Ch] [CH] N 1 mm/[pi]

drop volume drp [drp] [DRP] N 1 ml/12

Hounsfield unit x-ray attenuation HF [hnsf'U] [HNSF'U] N 1 1

metabolic equivalent metabolic cost of physical activity MET [MET] [MET] N 3.5 mL/min/kg

name	kind of quantity	print	c/s	c/i	M	value	definition
meter of water column	pressure	m H₂O	`m[H2O]`	`M[H2O]`	Y	9.80665	`kPa`
meter of mercury column	pressure	m Hg	`m[Hg]`	`M[HG]`	Y	133.3220	`kPa`
inch of water column	pressure	in H₂O	`[in_i'H2O]`	`[IN_I'H2O]`	N	1	`m[H2O].[in_i]/m`
inch of mercury column	pressure	in Hg	`[in_i'Hg]`	`[IN_i'HG]`	N	1	`m[Hg].[in_i]/m`
peripheral vascular resistance unit		P.R.U.	`[PRU]`	`[PRU]`	N	1	`mm[Hg].s/ml`
diopter	refraction of a lens	dpt	`[diop]`	`[DIOP]`	N	1	`/m`
mesh	(lineic number)		`[mesh_i]`	`[MESH_I]`	N	1	`/[in_i]`
Charrière (french)	gauge of catheters	Ch	`[Ch]`	`[CH]`	N	1	`mm/[pi]`
drop	volume	drp	`[drp]`	`[DRP]`	N	1	`ml/12`
Hounsfield unit	x-ray attenuation	HF	`[hnsf'U]`	`[HNSF'U]`	N	1	`1`
metabolic equivalent	metabolic cost of physical activity	MET	`[MET]`	`[MET]`	N	3.5	`mL/min/kg`

3.10 Units Used in Chemical and Biochemical Laboratories

name kind of quantity print c/s c/i M value definition

equivalents eq eq EQ Y 1 mol

osmole (dissolved particles) osm osm OSM Y 1 mol

pH acidity pH [pH] [PH] N * pH(1 mol/l)

gram percent g% g% G% Y 1 g/dl

Svedberg unit sedimentation coefficient S [S] [S] N 1 10*-13.s

high power field view area in microscope HPF [HPF] [HPF] N 1 1

low power field view area in microscope LPF [LPF] [LPF] N 100 1

katal catalytic activity kat kat KAT Y 1 mol/s

Unit catalytic activity U U U Y 1 umol/min

international unit i.U. [iU] [IU] Y 1 1

arbitary unit arb. U [arb'U] [ARB'U] N 1 1

United States Pharmacopeia unit U.S.P. [USP'U] [USP'U] N 1 1

{it anticardiolipin IgG} [GPL'U] [GPL'U] N 1 1

anticardiolipin IgM [MPL'U] [MPL'U] N 1 1

anticardiolipin IgA [APL'U] [APL'U] N 1 1

Bethesda unit factor VIII inhibitor [beth'U] [BETH'U] N 1 1

Todd unit antistreptolysin O [todd'U] [TODD'U] N 1 1

Dye unit amylase [dye'U] [DYE'U] N 1 1

Somogyi unit amylase [smgy'U] [SMGY'U] N 1 1

Bodansky unit phosphatase [bdsk'U] [BDSK'U] N 1 1

King-Armstrong unit phosphatase [ka'U] [KA'U] N 1 1

Kunkel unit [knk'U] [KNK'U] N 1 1

Mac Lagan unit [mclg'U] [MCLG'U] N 1 1

tuberculin unit tuberculin [tb'U] [TB'U] N 1 1

name	kind of quantity	print	c/s	c/i	M	value	definition
equivalents		eq	`eq`	`EQ`	Y	1	`mol`
osmole (dissolved particles)		osm	`osm`	`OSM`	Y	1	`mol`
pH	acidity	pH	`[pH]`	`[PH]`	N	*	`pH(1 mol/l)`
gram percent		g%	`g%`	`G%`	Y	1	`g/dl`
Svedberg unit	sedimentation coefficient	S	`[S]`	`[S]`	N	1	`10*-13.s`
high power field	view area in microscope	HPF	`[HPF]`	`[HPF]`	N	1	`1`
low power field	view area in microscope	LPF	`[LPF]`	`[LPF]`	N	100	`1`
katal	catalytic activity	kat	`kat`	`KAT`	Y	1	`mol/s`
Unit	catalytic activity	U	`U`	`U`	Y	1	`umol/min`
international unit		i.U.	`[iU]`	`[IU]`	Y	1	`1`
arbitary unit		arb. U	`[arb'U]`	`[ARB'U]`	N	1	`1`
United States Pharmacopeia unit		U.S.P.	`[USP'U]`	`[USP'U]`	N	1	`1`
	{it anticardiolipin IgG}		`[GPL'U]`	`[GPL'U]`	N	1	`1`
	anticardiolipin IgM		`[MPL'U]`	`[MPL'U]`	N	1	`1`
	anticardiolipin IgA		`[APL'U]`	`[APL'U]`	N	1	`1`
Bethesda unit	factor VIII inhibitor		`[beth'U]`	`[BETH'U]`	N	1	`1`
Todd unit	antistreptolysin O		`[todd'U]`	`[TODD'U]`	N	1	`1`
Dye unit	amylase		`[dye'U]`	`[DYE'U]`	N	1	`1`
Somogyi unit	amylase		`[smgy'U]`	`[SMGY'U]`	N	1	`1`
Bodansky unit	phosphatase		`[bdsk'U]`	`[BDSK'U]`	N	1	`1`
King-Armstrong unit	phosphatase		`[ka'U]`	`[KA'U]`	N	1	`1`
Kunkel unit			`[knk'U]`	`[KNK'U]`	N	1	`1`
Mac Lagan unit			`[mclg'U]`	`[MCLG'U]`	N	1	`1`
tuberculin unit	tuberculin		`[tb'U]`	`[TB'U]`	N	1	`1`

3.11 Levels

name kind of quantity print c/s c/i M value definition

neper level Np Np NEP Y * ln(1 1)

bel level B B B Y * lg(1 1)

bel sound pressure B(SPL) B[SPL] B[SPL] Y * 2lg(2 10*-5.Pa)

bel volt B(V) B[V] B[V] Y * 2lg(1 V)

bel milivolts B(mV) B[mV] B[MV] Y * 2lg(1 mV)

bel microvolts B(µV) B[uV] B[UV] Y * 2lg(1 uV)

bel watts B(W) B[W] B[W] Y * lg(1 W)

bel kilowatts B(kW) B[kW] B[KW] Y * lg(1 kW)

name	kind of quantity	print	c/s	c/i	M	value	definition
neper	level	Np	`Np`	`NEP`	Y	*	`ln(1 1)`
bel	level	B	`B`	`B`	Y	*	`lg(1 1)`
bel sound pressure		B(SPL)	`B[SPL]`	`B[SPL]`	Y	*	`2lg(2 10*-5.Pa)`
bel volt		B(V)	`B[V]`	`B[V]`	Y	*	`2lg(1 V)`
bel milivolts		B(mV)	`B[mV]`	`B[MV]`	Y	*	`2lg(1 mV)`
bel microvolts		B(µV)	`B[uV]`	`B[UV]`	Y	*	`2lg(1 uV)`
bel watts		B(W)	`B[W]`	`B[W]`	Y	*	`lg(1 W)`
bel kilowatts		B(kW)	`B[kW]`	`B[KW]`	Y	*	`lg(1 kW)`

3.12 Miscellaneous Units

name kind of quantity print c/s c/i M value definition

stere volume st st STR Y 1 m3

Ångström length Å Ao AO N 0.1 nm

barn area (action) b b BRN N 100 fm2

atmosphere (technical) pressure at att ATT N 1 kgf/cm2

psi pressure psi [psi] [PSI] N 1 [lbf_av]/[in_i]2

circle plane angle circ circ CIRC N 2 [pi].rad

spere solid angle sph sph SPH N 4 [pi].sr

carat (metric) mass ct_m [car_m] [CAR_M] N 0.2 g

carat (of gold alloys) ct_Au [car_Au] [CAR_AU] N 1 /24

name	kind of quantity	print	c/s	c/i	M	value	definition
stere	volume	st	`st`	`STR`	Y	1	`m3`
Ångström	length	Å	`Ao`	`AO`	N	0.1	`nm`
barn	area (action)	b	`b`	`BRN`	N	100	`fm2`
atmosphere (technical)	pressure	at	`att`	`ATT`	N	1	`kgf/cm2`
psi	pressure	psi	`[psi]`	`[PSI]`	N	1	`[lbf_av]/[in_i]2`
circle	plane angle	circ	`circ`	`CIRC`	N	2	`[pi].rad`
spere	solid angle	sph	`sph`	`SPH`	N	4	`[pi].sr`
carat (metric)	mass	ct_m	`[car_m]`	`[CAR_M]`	N	0.2	`g`
carat (of gold alloys)		ct_Au	`[car_Au]`	`[CAR_AU]`	N	1	`/24`

3.13 Prefixes and Units Used in Information Technology

3.13.1 Prefixes

name print c/s c/i value

kibi Ki Ki KIB 1024

mebi Mi Mi MIB 1048576

gibi Gi Gi GIB 1073741824

tebi Ti Ti TIB 1099511627776

name	print	c/s	c/i	value
kibi	Ki	`Ki`	`KIB`	1024
mebi	Mi	`Mi`	`MIB`	1048576
gibi	Gi	`Gi`	`GIB`	1073741824
tebi	Ti	`Ti`	`TIB`	1099511627776

3.13.2 Units

name kind of quantity print c/s c/i M value definition

bit amount of information bit_s bit_s BIT_S N * ld(1 1)

bit amount of information bit bit BIT Y 1 1

byte amount of information B By BY Y 8 bit

baud signal transmission rate Bd Bd Bd Y 1 /s

name	kind of quantity	print	c/s	c/i	M	value	definition
bit	amount of information	bit_s	`bit_s`	`BIT_S`	N	*	`ld(1 1)`
bit	amount of information	bit	`bit`	`BIT`	Y	1	`1`
byte	amount of information	B	`By`	`BY`	Y	8	`bit`
baud	signal transmission rate	Bd	`Bd`	`Bd`	Y	1	`/s`

3.14 Examples of some Non-Units

name kind of quantity print c/s c/i M value definition

particles total count number tot. `{tot}` `{TOT}` N * `1`

tablets number tbl. `{tbl}` `{TBL}` N * `1`

colony forming units number C.F.U. `{cfu}` `{CFU}` N * `1`

red blood cell count number R.B.C. `{rbc}` `{RBC}` N * `1`

gram meter per heartbeat proportional to ventricular stroke work g·m/H.B. `g.m/{H.B.}` `G.M/{H.B.}` N * `1`

kilogram of wet tissue mass kg(wet tissue) `kg{wet'tis}` `KG{wet'tis}` N * `1`

milligram of creatinine mass mg(creat.) `mg{creat}` `MG{creat}` N * `1`

name	kind of quantity	print	c/s	c/i	M	value	definition
particles total count	number	tot.	`{tot}`	`{TOT}`	N	*	`1`
tablets	number	tbl.	`{tbl}`	`{TBL}`	N	*	`1`
colony forming units	number	C.F.U.	`{cfu}`	`{CFU}`	N	*	`1`
red blood cell count	number	R.B.C.	`{rbc}`	`{RBC}`	N	*	`1`
gram meter per heartbeat	proportional to ventricular stroke work	g·m/H.B.	`g.m/{H.B.}`	`G.M/{H.B.}`	N	*	`1`
kilogram of wet tissue	mass	kg(wet tissue)	`kg{wet'tis}`	`KG{wet'tis}`	N	*	`1`
milligram of creatinine	mass	mg(creat.)	`mg{creat}`	`MG{creat}`	N	*	`1`

4 Alphabetical Listing of all Units

name kind of quantity print c/s c/i M value definition

Ångström length Å Ao AO N 0.1 nm

acceleration of free fall (standard) acceleration g_n [g] [G] Y 9.80665 m/s2

acre area [acr_br] [ACR_BR] N 4840 [yd_br]2

acre area [acr_us] [ACR_US] N 160 [rd_us]2

Ampère electric current A A A Y 1 C/s

are area a ar AR Y 100 m2

astronomic unit length AU AU ASU N 149597.870 Mm

atmosphere (standard) pressure atm atm ATM N 101325 Pa

atmosphere (technical) pressure at att ATT N 1 kgf/cm2

bar pressure bar bar BAR Y 1 × 10⁵ Pa

barn area (action) b b BRN N 100 fm2

barrel volume (fluid) [bbl_us] [BBL_US] N 42 [gal_us]

baud signal transmission rate Bd Bd Bd Y 1 /s

Becquerel radioactivity Bq Bq BQ Y 1 s-1

bel level B B B Y * lg(1 1)

bel kilowatts B(kW) B[kW] B[KW] Y * lg(1 kW)

bel microvolts B(µV) B[uV] B[UV] Y * 2lg(1 uV)

bel milivolts B(mV) B[mV] B[MV] Y * 2lg(1 mV)

bel sound pressure B(SPL) B[SPL] B[SPL] Y * 2lg(2 10*-5.Pa)

bel volt B(V) B[V] B[V] Y * 2lg(1 V)

bel watts B(W) B[W] B[W] Y * lg(1 W)

Biot electric current Bi Bi BI Y 10 A

bit amount of information bit bit BIT Y 1 1

bit amount of information bit_s bit_s BIT_S N * ld(1 1)

board foot volume [bf_i] [BF_I] N 144 [in_i]3

Boltzman constant k [k] [K] Y 1.380658 × 10^-23 J/K

British thermal unit (39 °F) energy Btu_39°F [Btu_39] [BTU_39] N 1.05967 kJ

Btu (59 °F) energy Btu_59°F [Btu_59] [BTU_59] N 1.05480 kJ

Btu (60 °F) energy Btu_60°F [Btu_60] [BTU_60] N 1.05468 kJ

Btu (intl. table) energy Btu_IT [Btu_IT] [BTU_IT] N 1.05505585262 kJ

Btu (mean) energy Btu_m [Btu_m] [BTU_M] N 1.05587 kJ

Btu (thermochemical) energy Btu_th [Btu_th] [BTU_TH] N 1.054350 kJ

Btu (usual) energy btu [Btu] [BTU] N 1 [Btu_th]

bushel volume [pk_br] [PK_BR] N 2 [gal_br]

bushel volume (dry) [bu_us] [BU_US] N 2150.42 [in_i]3

byte amount of information B By BY Y 8 bit

calorie (15 °C) energy cal_15°C cal_[15] CAL_[15] Y 4.18580 J

calorie (20 °C) energy cal_20°C cal_[20] CAL_[20] Y 4.18190 J

calorie (intl. table) energy cal_IT cal_IT CAL_IT Y 4.1868 J

calorie (mean) energy cal_m cal_m CAL_M Y 4.19002 J

Calorie (nutrition) energy Cal [Cal] [CAL] N 1 kcal_th

calorie (thermochemical) energy cal_th cal_th CAL_TH Y 4.184 J

calorie (usual) energy cal cal CAL Y 1 cal_th

carat (metric) mass ct_m [car_m] [CAR_M] N 0.2 g

carat (of gold alloys) ct_Au [car_Au] [CAR_AU] N 1 /24

chain (Gunter's chain) length [ch_br] [CH_BR] N 4 [rd_br]

chain (Gunter's or Surveyor's) length [ch_us] [CH_US] N 4 [rd_us]

chain (Ramden's or Engineer's) length [rch_us] [RCH_US] N 100 [ft_us]

Charrière (french) gauge of catheters Ch [Ch] [CH] N 1 mm/[pi]

cicero (Didot's pica) length [cicero] [CICERO] N 12 [didot]

circle plane angle circ circ CIRC N 2 [pi].rad

circular mil area circ.mil [cml_i] [CML_I] N 1 [pi]/4.[mil_i]2

cord volume [cr_i] [CR_I] N 128 [ft_i]3

cord volume (fluid) [crd_us] [CRD_US] N 128 [ft_i]3

cubic foot volume [cft_i] [CFT_I] N 1 [ft_i]3

cubic inch volume [cin_i] [CIN_I] N 1 [in_i]3

cubic yard volume cu.yd [cyd_i] [CYD_I] N 1 [yd_i]3

cup volume [cup_us] [CUP_US] N 16 [tbs_us]

Curie radioactivity Ci Ci CI Y 3.7 × 10¹⁰ Bq

day time d d D N 24 h

degree plane angle ° deg DEG N 2 [pi].rad/360

degree Celsius temperature °C Cel CEL Y * cel(1 K)

degree Fahrenheit temperature °F [degF] [DEGF] N * degf(5 K/9)

didot (Didot's point) length [didot] [DIDOT] N 1 [ligne]/6

diopter refraction of a lens dpt [diop] [DIOP] N 1 /m

dram mass [dr_av] [DR_AV] N 1 [oz_av]/16

dram (drachm) mass [dr_ap] [DR_AP] N 3 [sc_ap]

drop volume drp [drp] [DRP] N 1 ml/12

dry pint volume (dry) [dpt_us] [DPT_US] N 1 [dqt_us]/2

dry quart volume (dry) [dqt_us] [DQT_US] N 1 [pk_us]/8

dyne force dyn dyn DYN Y 1 g.cm/s2

electron mass mass m_e [m_e] [M_E] Y 9.1093897 × 10^-28 g

electronvolt energy eV eV EV Y 1 [e].V

elementary charge el. charge e [e] [E] Y 1.60217733 × 10^-19 C

erg energy erg erg ERG Y 1 dyn.cm

Farad el. capacitance F F F Y 1 C/V

fathom depth of water fth [fth_i] [FTH_I] N 6 [ft_i]

fathom length [fth_br] [FTH_BR] N 6 [ft_br]

fathom length [fth_us] [FTH_US] N 6 [ft_us]

fluid dram volume [fdr_br] [FDR_BR] N 1 [foz_br]/8

fluid dram volume (fluid) [fdr_us] [FDR_US] N 1 [foz_us]/8

fluid ounce volume [foz_br] [FOZ_BR] N 1 [gil_br]/5

fluid ounce volume (fluid) oz fl [foz_us] [FOZ_US] N 1 [gil_us]/4

foot length ft, ' [ft_i] [FT_I] N 12 [in_i]

foot length ft_us [ft_us] [FT_US] N 1200 m/3937

foot length [ft_br] [FT_BR] N 12 [in_br]

foot length [rd_br] [RD_BR] N 16.5 [ft_br]

furlong length [fur_us] [FUR_US] N 40 [rd_us]

Gal acceleration Gal Gal GL Y 1 cm/s2

gallon volume [gal_br] [GAL_BR] N 4.54609 l

gallon (Queen Anne's wine gallon) volume (fluid) [gal_us] [GAL_US] N 231 [in_i]3

Gauss mag. flux density Gs, G G GS Y 1 × 10^-4 T

Gilbert mag. tension Gb Gb GB Y 1 Oe.cm

gill volume [gil_br] [GIL_BR] N 1 [pt_br]/4

gill volume (fluid) [gil_us] [GIL_US] N 1 [pt_us]/4

gon (grade) plane angle ^g gon GON N 0.9 deg

grain mass [gr] [GR] N 64.79891 mg

gram-force force gf gf GF Y 1 g.[g]

Gray energy dose Gy Gy GY Y 1 J/kg

hand height of horses hd [hd_i] [HD_I] N 4 [in_i]

Henry inductance H H H Y 1 Wb/A

Herz frequency Hz Hz HZ Y 1 s-1

horsepower power [HP] [HP] N 550 [ft_i].[lbf_av]/s

Hounsfield unit x-ray attenuation HF [hnsf'U] [HNSF'U] N 1 1

hour time h h HR N 60 min

inch length in, '' [in_i] [IN_I] N 2.54 cm

inch length [in_br] [IN_BR] N 2.539998 cm

inch length [in_us] [IN_US] N 1 [ft_us]/12

inch of mercury column pressure in Hg [in_i'Hg] [IN_i'HG] N 1 m[Hg].[in_i]/m

inch of water column pressure in H₂O [in_i'H2O] [IN_I'H2O] N 1 m[H2O].[in_i]/m

Joule energy J J J Y 1 N.m

Kayser (lineic number) K Ky KY Y 1 cm-1

knot velocity knot [kn_i] [KN_I] N 1 [nmi_i]/h

knot velocity [kn_br] [KN_BR] N 1 [nmi_br]/h

Lambert brightness L Lmb LMB Y 1 cd/cm2/[pi]

light-year length l.y. [ly] [LY] Y 1 [c].a_j

ligne (French line) length [ligne] [LIGNE] N 1 [pouce]/12

line length [lne] [LNE] N 1 [in_i]/12

link (for Gunter's chain) length [lk_br] [LK_BR] N 1 [ch_br]/100

link (for Gunter's chain) length [lk_us] [LK_US] N 1 [ch_us]/100

link (for Ramden's chain) length [rlk_us] [RLK_US] N 1 [rch_us]/100

liter volume l l L Y 1 dm3

long hunderdweight (British) mass [lcwt_av] [LCWT_AV] N 112 [lb_av]

long ton (British) mass [lton_av] [LTON_AV] N 20 [lcwt_av]

lumen luminous flux lm lm LM Y 1 cd.sr

lux illuminance lx lx LX Y 1 lm/m2

Maxwell flux of magnetic induction Mx Mx MX Y 1 × 10^-8 Wb

mesh (lineic number) [mesh_i] [MESH_I] N 1 /[in_i]

metabolic equivalent metabolic cost of physical activity MET [MET] [MET] N 3.5 mL/min/kg

meter of mercury column pressure m Hg m[Hg] M[HG] Y 133.3220 kPa

meter of water column pressure m H₂O m[H2O] M[H2O] Y 9.80665 kPa

mil length mil [mil_i] [MIL_I] N 1 × 10^-3 [in_i]

mil length [mil_us] [MIL_US] N 1 × 10^-3 [in_us]

mile length [mi_br] [MI_BR] N 5280 [ft_br]

mile length [mi_us] [MI_US] N 8 [fur_us]

minim volume [min_br] [MIN_BR] N 1 [fdr_br]/60

minim volume (fluid) [min_us] [MIN_US] N 1 [fdr_us]/60

minute plane angle ' ' ' N 1 deg/60

minute time min min MIN N 60 s

month time mo mo MO N 1 mo_j

month (Gregorian) time mo_g mo_g MO_G N 1 a_g/12

month (Julian) time mo_j mo_j MO_J N 1 a_j/12

month (synodal) time mo_s mo_s MO_S N 29.53059 d

nautic mile length n.mi [nmi_i] [NMI_I] N 1852 m

nautic mile length [nmi_br] [NMI_BR] N 6080 [ft_br]

neper level Np Np NEP Y * ln(1 1)

Newton force N N N Y 1 kg.m/s2

Newtonian constant of gravitation G [G] [GC] Y 6.67259 × 10^-11 m3.kg-1.s-2

Oersted mag. field intensity Oe Oe OE Y 250 /[pi].A/m

Ohm el. resistance Ohm OHM Y 1 V/A

ounce mass oz [oz_av] [OZ_AV] N 1 [lb_av]/16

ounce mass [oz_ap] [OZ_AP] N 8 [dr_ap]

ounce mass [oz_tr] [OZ_TR] N 20 [pwt_tr]

pace length [pc_br] [PC_BR] N 2.5 [ft_br]

parsec length pc pc PRS Y 3.085678 × 10¹⁶ m

parts per billion ppb [ppb] [PPB] N 1 10*-9

parts per million ppm [ppm] [PPM] N 1 10*-6

parts per thousand ppth [ppth] [PPTH] N 1 10*-3

parts per trillion pptr [pptr] [PPTR] N 1 10*-12

Pascal pressure Pa Pa PAL Y 1 N/m2

peck volume [bu_br] [BU_BR] N 4 [pk_br]

peck volume (dry) [pk_us] [PK_US] N 1 [bu_us]/4

pennyweight mass [pwt_tr] [PWT_TR] N 24 [gr]

peripheral vascular resistance unit P.R.U. [PRU] [PRU] N 1 mm[Hg].s/ml

permeability of vacuum µ₀ [mu_0] [mu_0] Y 1 4.[pi].10*-7.N/A2

permittivity of vacuum ₀ [eps_0] [eps_0] Y 8.854187817 × 10^-12 F/m

phot illuminance ph ph PHT Y 1 × 10^-4 lx

pica length [pca] [PCA] N 12 [pnt]

pied (French foot) length [pied] [PIED] N 32.48 cm

pint volume [pt_br] [PT_BR] N 1 [qt_br]/2

pint volume (fluid) [pt_us] [PT_US] N 1 [qt_us]/2

Planck constant h [h] [H] Y 6.6260755 × 10^-34 J.s

point length [pnt] [PNT] N 1 [lne]/6

Poise dynamic viscosity P P P Y 1 dyn.s/cm2

pouce (French inch) length [pouce] [POUCE] N 1 [pied]/12

pound mass lb [lb_av] [LB_AV] N 7000 [gr]

pound mass [lb_ap] [LB_AP] N 12 [oz_ap]

pound mass [lb_tr] [LB_TR] N 12 [oz_tr]

pound force force lbf [lbf_av] [LBF_AV] N 1 [lb_av].[g]

Printer's pica length [pca_pr] [PCA_PR] N 12 [pnt_pr]

Printer's point length [pnt_pr] [PNT_PR] N 0.013837 [in_i]

proton mass mass m_p [m_p] [M_P] Y 1.6726231 × 10^-24 g

psi pressure psi [psi] [PSI] N 1 [lbf_av]/[in_i]2

quart volume [qt_br] [QT_BR] N 1 [gal_br]/4

quart volume (fluid) [qt_us] [QT_US] N 1 [gal_us]/4

radiation absorbed dose energy dose RAD RAD [RAD] Y 100 erg/g

radiation equivalent man dose equivalent REM REM [REM] Y 1 RAD

rod length [rd_us] [RD_US] N 16.5 [ft_us]

Roentgen ion dose R R ROE Y 2.58 × 10^-4 C/kg

scruple mass [sc_ap] [SC_AP] N 20 [gr]

second plane angle '' '' '' N 1 '/60

section area [sct] [SCT] N 1 [mi_us]2

short hundredweight (U.S.) mass [scwt_av] [SCWT_AV] N 100 [lb_av]

short ton (U.S.) mass [ston_av] [STON_AV] N 20 [scwt_av]

Siemens el. conductance S S SIE Y 1 Ohm-1

Sievert dose equivalent Sv Sv SV Y 1 J/kg

spere solid angle sph sph SPH N 4 [pi].sr

square foot area [sft_i] [SFT_I] N 1 [ft_i]2

square inch area [sin_i] [SIN_I] N 1 [in_i]2

square mile area [smi_us] [SMI_US] N 1 [mi_us]2

square rod area [srd_us] [SRD_US] N 1 [rd_us]2

square yard area [syd_i] [SYD_I] N 1 [yd_i]2

statute mile length mi [mi_i] [MI_I] N 5280 [ft_i]

stere volume st st STR Y 1 m3

stilb lum. intensity density sb sb SB Y 1 cd/cm2

Stokes kinematic viscosity St St ST Y 1 cm2/s

stone (British) mass [stone_av] [STONE_AV] N 14 [lb_av]

streadian solid angle sr sr SR Y 1 rad2

tablespoon volume [tbs_us] [TBS_US] N 1 [foz_us]/2

teaspoon volume [tsp_us] [TSP_US] N 1 [tbs_us]/3

Tesla mag. flux density T T T Y 1 Wb/m2

tonne mass t t TNE Y 1 × 10³ kg

township area [twp] [TWP] N 36 [sct]

unified atomic mass unit mass u u AMU Y 1.6605402 × 10^-24 g

velocity of light velocity c [c] [C] Y 299792458 m/s

Volt el. potential V V V Y 1 J/C

Watt power W W W Y 1 J/s

Weber magentic flux Wb Wb WB Y 1 V.s

week time wk wk WK N 7 d

winchester gallon (historical) volume (dry) [gal_wi] [GAL_WI] N 1 [bu_us]/8

yard length yd [yd_i] [YD_I] N 3 [ft_i]

yard length [yd_br] [YD_BR] N 3 [ft_br]

yard length [yd_us] [YD_US] N 3 [ft_us]

year time a a ANN N 1 a_j

year (mean Gregorian) time a_g a_g ANN_G N 365.2425 d

year (mean Julian) time a_j a_j ANN_J N 365.25 d

year (tropical) time a_t a_t ANN_T N 365.24219 d

L L Y 1 l

anticardiolipin IgA [APL'U] [APL'U] N 1 1

anticardiolipin IgM [MPL'U] [MPL'U] N 1 1

{it anticardiolipin IgG} [GPL'U] [GPL'U] N 1 1

arbitary unit arb. U [arb'U] [ARB'U] N 1 1

Bethesda unit factor VIII inhibitor [beth'U] [BETH'U] N 1 1

Bodansky unit phosphatase [bdsk'U] [BDSK'U] N 1 1

candela luminous intensity cd cd CD

colony forming units number C.F.U. {cfu} {CFU} N * 1

Coulomb electric charge C C C

Dye unit amylase [dye'U] [DYE'U] N 1 1

equivalents eq eq EQ Y 1 mol

gram meter per heartbeat proportional to ventricular stroke work g·m/H.B. g.m/{H.B.} G.M/{H.B.} N * 1

gram percent g% g% G% Y 1 g/dl

gram mass g g G

high power field view area in microscope HPF [HPF] [HPF] N 1 1

international unit i.U. [iU] [IU] Y 1 1

katal catalytic activity kat kat KAT Y 1 mol/s

Kelvin temperature K K K

kilogram of wet tissue mass kg(wet tissue) kg{wet'tis} KG{wet'tis} N * 1

King-Armstrong unit phosphatase [ka'U] [KA'U] N 1 1

Kunkel unit [knk'U] [KNK'U] N 1 1

low power field view area in microscope LPF [LPF] [LPF] N 100 1

Mac Lagan unit [mclg'U] [MCLG'U] N 1 1

meter length m m M

milligram of creatinine mass mg(creat.) mg{creat} MG{creat} N * 1

mole amount of substance mol mol MOL Y 6.0221367 10*23

osmole (dissolved particles) osm osm OSM Y 1 mol

particles total count number tot. {tot} {TOT} N * 1

percent % % % N 1 10*-2

pH acidity pH [pH] [PH] N * pH(1 mol/l)

radian plane angle rad rad RAD

red blood cell count number R.B.C. {rbc} {RBC} N * 1

second time s s S

Somogyi unit amylase [smgy'U] [SMGY'U] N 1 1

Svedberg unit sedimentation coefficient S [S] [S] N 1 10*-13.s

tablets number tbl. {tbl} {TBL} N * 1

ten, for arbitrary powers 10ⁿ 10* 10* N 10 1

the number pi [pi] [PI] N 1

Todd unit antistreptolysin O [todd'U] [TODD'U] N 1 1

tuberculin unit tuberculin [tb'U] [TB'U] N 1 1

Unit catalytic activity U U U Y 1 umol/min

United States Pharmacopeia unit U.S.P. [USP'U] [USP'U] N 1 1