| Basic Units and Quantities |
| quantity | abbreviation | Metric Units | U.S. Units | |
| area | A | meter squared [m2] | square inch [in2], square foot [ft2], square yard [yd2], square mile [mi2] | |
| distance | d | meter [m] | inch [in], foot [ft], yard [yd], mile [mi] | |
| electric current | i | ampere [A] | ||
| frequency | inverse second [s-1], hertz [Hz] | |||
| luminous intensity | candela [cd] | |||
| mass | m | kilogram [kg] | pound mass [lbm] | |
| temperature | T | Celsius [°C], Kelvin [K] | Fahrenheit [F] | |
| time | t | second [s], minute [min], hour [hr] | ||
| volume | V | meter cubed [m3] | cubic foot [ft3] | |
| quantity | abbreviation | quantity desription | Metric Units | U.S. Units | Other |
| capacitance | C | farad [F], coulomb/volt | |||
| charge | q | coulomb [C], ampere/second | |||
| conductance | siemens [S], ampere/volt | ||||
| density | ρ | mass/volume, inverse of specific volume | kg/m3 | lbm/ft3 | |
| electric potential | v | volt [V], watt/ampere | |||
| force | F | (mass*distance)/time2 | newton [N] = kg*m/s2 | pound-force [lbf] = lbm*ft/s2 | |
| inductance | L | henry [H], weber/ampere | |||
| magnetic flux | weber [Wb], volt*second | ||||
| power | work/time | watt [W] | |||
| pressure | P | force/area | pascal [Pa] | atmosphere [atm], bar [bar] | |
| resistance | ohm [Ω], volt/ampere | ||||
| specific volume | υ | volume/mass, inverse of density | m3/kg | ||
| velocity | u, v | distance/time | m/s | ft/s | |
| work or energy | force*distance | joule [J] - N*m | |||