The international system of units is based upon:
Seven base units (Table D-1)
Two supplementary units (Table D-2)
Derived units.
| length | meter | m |
| mass | kilogram | kg |
| time | second | s |
| electric current | ampere | A |
| temperature | kelvin | K |
| luminous intensity | candela | cd |
| amount of substance | mole | mol |
| plane angle | radian | rad |
| solid angle | steradian | sr |
The derived units may be divided into three groups:
Units which are expressed in terms of base and supplementary units (Table D-3)
Units which have been given special names and symbols (Table D-4)
Units which are expressed in terms of other derived units (Table D-5).
| acceleration | meter per second squared | m/s 2 |
| angular acceleration | radian per second squared | rad/s 2 |
| area | square meter | m 2 |
| coefficient of linear expansion | 1 per kelvin | 1/k |
| density | kilogram per cubic meter | kg/m 3 |
| kinematic viscosity | square meter per second | m 2/s |
| mass flow rate | kilogram per second | kg/s |
| molar mass | kilogram per mole | kg/mol |
| specific volume | cubic meter per kilogram | m 3/kg |
| velocity | meter per second | m/s |
| volume | cubic meter | m 3 |
| force | newton | 1N | = 1 kg-m/s 2 | |
| N | ||||
| pressure | pascal | 1Pa | = 1N/m 2 | = 1 kg m s |
| stress | Pa | |||
| energy | joule | 1J | = 1N m | = lkg m 2/s 2 |
| work | J |
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