SI units
Quantity | Name of unit | Symbol | Equivalent | Reciprocal |
|---|---|---|---|---|
length | metre | m | 3.281 feet | 1 ft = 0.3048 m |
mass | kilogram | kg | 2.2 pounds | 1 lb = 0.454 kg |
time | second | s | ||
ampere | A | |||
thermodynamic temperature | kelvin | K | 1°C = 1.8°F | 1°C = 1 K |
luminous intensity | candela | cd | ||
amount of substance | mole | mol |
Quantity | Unit | Symbol |
|---|---|---|
plane angle | radian | rad |
solid angle | steradian | sr |
Quantity | Name of unit | Symbol | Equivalent | Reciprocal |
|---|---|---|---|---|
frequency | hertz | Hz | ||
energy | joule | J | 0.2388 calories | 1 cal = 4.1868 J |
force | newton | N | 0.225 pounds force | 1 lbf = 4.448 N |
power | watt | W | 0.00134 horse power | 1 hp = 745.7 W |
pressure | pascal | Pa | 0.00689 pounds force/sq.inch | 1 lbf/sq.in = 145 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 | tesla | T | ||
luminous flux | lumen | lm | ||
illuminous | lux | lx | ||
absorbed dose | gray | Gy | ||
activity | becquerel | Bq | ||
dose equivalent | sievert | Sv |
Name of multiple | Symbol | Value (multiply by) |
|---|---|---|
atto | a | 10−18 |
femto | f | 10−15 |
pico | p | 10−12 |
nano | n | 10−9 |
micro | μ | 10−6 |
milli | m | 10−3 |
centi | c | 10−2 |
deci | d | 10−1 |
deca | da | 10 |
hecto | h | 102 |
kilo | k | 103 |
mega | M | 106 |
giga | G | 109 |
tera | T | 1012 |
peta | P | 1015 |
exa | E | 1018 |
