SI units
Physical quantity | Name of unit | Symbol for unit |
|---|---|---|
length | metre | m |
mass | kilogram | kg |
time | second | s |
ampere | A | |
thermodynamic temperature | kelvin | K |
luminous intensity | candela | cd |
amount of substance | mole | mol |
*plane angle | radian | rad |
*solid angle | steradian | sr |
*supplementary units |
Physical quantity | Name of unit | Symbol for unit |
|---|---|---|
frequency | hertz | Hz |
energy | joule | J |
force | newton | N |
power | watt | W |
pressure | pascal | Pa |
electric charge | coulomb | C |
electric potential difference | volt | V |
electric resistance | ohm | Ω |
electric conductance | siemens | S |
electric capacitance | farad | F |
weber | Wb | |
inductance | henry | H |
magnetic flux density (magnetic induction) | tesla | T |
luminous flux | lumen | lm |
illuminance (illumination) | lux | lx |
absorbed dose | gray | Gy |
activity | becquerel | Bq |
dose equivalent | sievert | Sv |
Submultiple | Prefix | Symbol | Multiple | Prefix | Symbol |
|---|---|---|---|---|---|
10−1 | deci | d | 101 | deca | da |
10−2 | centi | c | 102 | hecto | h |
10−3 | milli | m | 103 | kilo | k |
10−6 | micro | μ | 106 | mega | M |
10−9 | nano | n | 109 | giga | G |
10−12 | pico | p | 1012 | tera | T |
10−15 | femto | f | 1015 | peta | P |
10−16 | atto | a | 1016 | exa | E |
10−21 | zepto | z | 1021 | zetta | Z |
10−24 | yocto | y | 1024 | yotta | Y |
From | To | Multiply by |
|---|---|---|
Temperature conversion | ||
°C (Celsius) = 5/9(°F − 32) | ||
°F (Fahrenheit) = (9/5 × °C) + 32 | ||
in | m | 0.0254 |
ft | m | 0.3048 |
sq in | m2 | 0.00064516 |
sq ft | m2 | 0.092903 |
cu in | m3 | 0.0000164 |
cu ft | m3 | 0.0283168 |
l(itre) | m3 | 0.001 |
gal(lon) | m3 | 0.0045609 |
gal(lon) | litres | 4.5609 |
lb | kg | 0.453592 |
g cm−3 | kg m−3 | 1000 |
lb/in3 | kg m−3 | 27679.9 |
mmHg | Pa | 133.322 |
cal | J | 4.1868 |
m | in | 39.3701 |
cm | in | 0.393701 |
cm2 | sq in | 0.155 |
m2 | sq in | 1550 |
m2 | sq ft | 10.7639 |
m3 | cu in | 61023.6 |
m3 | cu ft | 35.3146 |
m3 | l(itre) | 1000 |
m3 | gal(lon) | 219.969 |
kg | lb | 2.20462 |
kg m−3 | g cm−3 | 0.001 |
kg m−3 | lb/in3 | 0.0000363 |
Pa | mmHg | 0.0075006 |
J | cal | 0.238846 |
