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General Data > Angle, area, volume and length units and equivalents

Angle

Unit Name Symbol SI Equivalent
arc minute (minute of arc)
' 2.90888x10-4 rad
arc second (second of arc)
" 4.84814x10-6 rad
circumference
  6.28319 rad
degree
° 1.74533x10-2 rad
gon
gr 1.5708x10-2 rad
grade
gr 1.5708x10-2 rad
hour of arc
  0.261799 rad
milliradian
mrad 1x10-3 rad
percent
% 9.99967x10-3 rad
quadrant (angle)
  1.5708 rad
radian
rad 1 rad
revolution
rev 6.28319 rad
sign
  0.523599 rad

Solid Angle

Unit Name Symbol SI Equivalent
spat
sp 12.5664 sr
square arcminute
sq ' 8.46159x10-8 sr
square arcsec
sq " 2.35044x10-11 sr
square degree
sq ° 3.04614x10-4 sr
steradian
sr 1 sr

Area

Unit Name Symbol SI Equivalent
acre
ac, acre 4046.86 m2
are
a 100 m2
barn
b 1x10-28 m2
barrel (US, liq.) per foot
bbl (US, liq.)/ft 0.391209 m2
barrel (US, liq.) per inch
bbl (US, liq.)/in 4.69451 m2
barrel (US, petrol) per foot
bbl (US, petrol)/ft 0.521612 m2
barrel (US, petrol) per inch
bbl (US, petrol)/in 6.25934 m2
centare
  1 m2
circular inch
cin 5.06707x10-4 m2
circular mil
cmil 5.06707x10-10 m2
hectare
ha 1x104 m2
morgen (Dutch)
  8244.35 m2
morgen (Prussian)
  2532.24 m2
morgen (South Africa)
  8565.3 m2
quarter section
  6.47497x105 m2
rood (UK)
  1011.71 m2
section (square statute mile)
sq.mi, mi2 (stat.) 2.58999x106 m2
shed
  1x10-52 m2
square centimeter
cm2 1x10-4 m2
square chain (engineer's)
sq. ch. (engineer's) 929.03 m2
square chain (Gunter's)
sq. ch. (Gunter's) 404.686 m2
square decameter
dam2 100 m2
square decimeter
dm2 1x10-2 m2
square exameter
Em2 1x1036 m2
square femtometer
fm2 1x10-30 m2
square fermi
f2 1x10-30 m2
square foot
ft2 9.2903x10-2 m2
square gigameter
Gm2 1x1018 m2
square hectometer
hm2 1x104 m2
square inch
in2, sq. in 6.4516x10-4 m2

Volume

Unit Name Symbol SI Equivalent
acre foot
acre-ft 1233.48 m3
bag (UK)
  0.109106 m3
barrel (US, cranb.)
bbl (US, cranb.) 9.5471x10-2 m3
barrel (US, liq.)
bbl (US, liq.) 0.11924 m3
barrel (US, petrol)
bbl (US, petrol) 0.158987 m3
board foot measure
fbm, B.M. 2.35974x10-3 m3
bouteille
  7.57682x10-4 m3
bucket (UK)
bk (UK) 1.81844x10-2 m3
bushel (UK)
bu (UK) 3.63687x10-2 m3
bushel (US, dry)
bu (US, dry) 3.52391x10-2 m3
butt (UK)
bt (UK) 0.490978 m3
centiliter
cl, cL 1x10-5 m3
chaldron (UK)
chal (UK) 1.30927 m3
cran
cran 0.170478 m3
cubic attometer
am3 1x10-54 m3
cubic centimeter
cm3 1x10-6 m3
cubic centimeter (Mohr cubic centimeter)
cc 1.00238x10-6 m3
cubic decameter
dam3 1000 m3
cubic decimeter
dm3 1x10-3 m3
cubic exameter
Em3 1x1054 m3
cubic femtometer
fm3 1x10-45 m3
cubic foot
ft 3 2.83168x10-2 m3
cubic gigameter
Gm3 1x1027 m3
cubic hectometer
hm3 1x106 m3
cubic inch
in 3 1.63871x10-5 m3
cubic kilometer
km3 1x109 m3
cubic megameter
Mm3 1x1018 m3
cubic meter
m3 1 m3
cubic micrometer
µm3 1x10-18 m3
cubic millimeter
mm3 1x10-9 m3

Length

Unit Name Symbol SI Equivalent
a.u. of length
a.u., a 0, b 5.29177x10-11 m
angstrom
Å 1x10-10 m
arcmin
arcmin 2.90888x10-4 m
astronomical unit
AU, UA 1.49598x1011 m
attometer
am 1x10-18 m
barleycorn (UK)
  8.46667x10-3 m
bohr (first Bohr radius)
a 0 , b 5.29177x10-11 m
bolt (US cloth)
  36.576 m
button (UK)
line (UK) 2.11667x10-3 m
button (US)
line (US) 6.35x10-4 m
cable length (int.)
  185.2 m
cable length (UK)
  185.318 m
cable length (US)
  219.456 m
caliber (centiinch)
caliber, cin 2.54x10-4 m
centimeter
cm 1x10-2 m
chain (engineer's)
ch 30.48 m
chain (Gunter's)
ch 20.1168 m
chain (Ramsden's)
ch 30.48 m
chain (surveyor's)
ch 20.1168 m
cubit (UK)
  0.4572 m
decameter
dam 10 m
decimeter
dm 0.1 m
electron classical radius
r e 2.81794x10-15 m
ell
  1.143 m
ems (pica)
  4.2175x10-3 m
exameter
Em 1x1018 m
fathom
fath 1.8288 m
femtometer
fm 1x10-15 m
fermi
F, f 1x10-15 m
first Bohr radius
a 0, b , a.u. 5.29177x10-11 m