Other reports in this collection
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Table X-1: SI (Systeme Internationale) Units and Fractions and Multiples Having Special Names |
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|
Physical Quantity
|
Name of Unit
|
Symbol
|
|
|
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|
amount of substance
|
mole
|
mol
|
|
area
|
hectare
|
ha
|
|
energy
|
joule
|
J (kg m2 s-2)
|
|
force
|
newton
|
N (kg m s-2)
|
|
frequency
|
hertz
|
Hz (s-1 = cycles per second)
|
|
length
|
metre (meter in this report)
|
m
|
|
length
|
micron
|
mm (10-6 m)
|
|
power
|
watt
|
W (kg m2 s-3 = J s-1)
|
|
pressure
|
pascal
|
Pa (kg m-1s-2 = N m-2
|
|
temperature
|
kelvin
|
K
|
|
time
|
second
|
s
|
|
weight (mass)
|
kilogram
|
kg
|
|
weight
|
tonne (ton in this report)
|
t (103 kg)
|
|
weight
|
gram
|
g (10-3 kg)
|
|
|
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| Fraction |
Prefix
|
Symbol
|
|
|
||
|
10-12
|
pico |
p
|
|
10-9
|
nano |
n
|
|
10-6
|
micro |
m
|
|
10-3
|
milli |
m
|
|
10-2
|
cent
|
c
|
|
10-1
|
deci
|
d
|
|
10
|
deca |
da
|
|
102
|
hecto
|
h
|
|
103
|
kilo |
k
|
|
106
|
mega
|
M
|
|
109
|
giga
|
G
|
|
1012
|
tera
|
T
|
|
1015
|
peta
|
P
|
|
1018
|
exa
|
E
|
| 1021 | zetta |
Z
|
|
|
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| Table X-2: Non-SI Units
|
|
| �C |
degrees Celsius (0�C = ~273K); Temperature differences are given in �C rather than the more correct form of "Celsius degrees" |
| Btu | British Thermal Unit (1.055 kJ) |
| kWh | kilowatt-hour (3.6 MJ) |
| MWe | megawatts of electricity (electrical capacity) |
| ppmv | parts per million by volume (106) |
| ppbv | parts per billion by volume (109) |
| pptv | parts per trillion by volume (1012) |
| tce | tons of coal equivalent (29.31 GJ) |
| toe | tons of oil equivalent (41.87 GJ) |
| TWh | terawatt-hour (3.6 PJ) |
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Other reports in this collection |
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