Reference Guide

B
Tables of Units and Constants B-1
B. Tables of Units and Constants
Units
Unit (Full Name) Value in SI Units
a (are) 100 m
2
A (ampere) 1 A
acre (acre) 4046.87260987 m
2
arcmin (minute of arc) 2.90888208666 x 10
-4
r
arcs (second of arc) 4.8481368111 x 10
-6
r
atm (atmosphere) 101325 kg / m•s
2
au (astronomical unit) 1.495979 x 10
11
m
Å (Angstrom) 1 x 10
-10
m
b (barn) 1 x 10
-28
m
2
bar (bar) 100000 kg / m•s
2
bbl (barrel) .158987294928 m
3
Bq (becquerel) 1 1 / s
Btu (international table Btu) 1055.05585262 kg•m
2
/ s
2
bu (bushel) .03523907 m
3
o
C (degree Celsius) 1K or 274.15 K
c (speed of light) 299792458 m / s
C (coulomb) 1 A•s
cal (calorie) 4.1868 kg•m
2
/ s
2
cd (candela) 1 cd
chain (chain) 20.1168402337 m
Ci (curie) 3.7 x 10
10
1 / s
ct (carat) .0002 kg
cu (US cup) 2.365882365 x 10
-4
m
3
o
(degree) 1.74532925199 x 10
-2
r
d (day) 86400 s
dB (decibel) 1 (dimensionless value)
dyn (dyne) .00001 kg / m•s
2
erg (erg) .0000001 kg•m
2
/ s
2
eV (electron volt) 1.60217733 x 10
-19
kg•m
2
/s
2
F (farad) 1 A
2
•s
4
/ kg•m
2