Quantity | Name | Symbol |
Length | meter, metre | m |
Mass | kilogram | kg |
Time | second | s |
Electric Current | ampere | A |
Temperature | kelvin | K |
Amount of Substance | mole | mol |
Quantity | Name | Formula | Special Symbol |
Area | square metre | m2 | - |
Volume | cubic metre | m3 | - |
Velocity | metre per second | m/s | - |
Density | kilogram per cubic metre | kg/m3 | - |
Concentration | moles per cubic metre | mol/m3 | - |
Force | newton | kg-m/s2 | N |
Energy | joule | kg-m2/s2, N-m | J |
Stress | pascal | kg/m-s2, N/m2 | Pa |
Strain | - | m/m | - |
Power, radiant flux | watt | kg-m2/s3, J/s | W |
Viscosity | pascal-second | kg/m-s | Pa-s |
Frequency | hertz | s-1 | Hz |
Electric Charge | coulomb | A-s | C |
Electric potential | volt | kg-m2/s2-C | V |
Capacitance | farad | s2-C/kg-m2 | F |
Electric Resistance | ohm | kg-m2/s-C2 | Ω |
Magnetic flux | weber | kg-m2/s-C | Wb |
Magnetic flux density | tesla | kg/s-C, Wb/m2 | T |
Factor | Prefix | Symbol |
1021 | zetta | Z |
1018 | exa | E |
1015 | peta | P |
1012 | tera | T |
109 | giga | G |
106 | mega | M |
103 | kilo | k |
10-2 | centi | c |
10-3 | milli | m |
10-6 | micro | μ |
10-9 | nano | n |
10-12 | pico | p |
10-15 | femto | f |
10-18 | atto | a |
10-21 | zepto | z |
Quantity | Conversion Factors |
Length | 1 mm = 0.03937008 inch 1 m = 3.280839895 ft 1 m = 1.093613298 yard 1 inch = 25.4 mm 1 ft = 0.3048 m 1 yard = 0.9144 m |
Area | 1 m2 = 10.76391042 ft 2 1 ft2 = 0.09290304 m2 |
Volume | 1 m3 = 35.31466672 ft3 1 ft3 = 0.028316847 m3 |
Mass | 1 kg = 2.20462262 lb 1 lb = 0.45359237 kg |
Density | 1 kg/m3 = 10-3 g/cm3 1 lb/ft3 = 16.02 kg/m3 |
Force | 1 N = 0.2248 lb 1 lb = 4.448 N |
Stress | 1 MPa = 145 psi 1 psi = 0.0069 MPa |
Energy | 1 J = 0.239 cal 1 J = 0.000948 Btu |
Temperature | T(K) = 273 + T(°C) T(K) = (5/9)[T(°F) - 32] + 273 T(°C) = (5/9)[T(°F) - 32] |