The unit is simply a particular example of the quantity concerned which is used as a reference, and the number is the ratio of the value of the quantity to the unit.

All quantities (mass, length, density, speed, force, pressure, energy, power) listed in these conversion tables can be ultimately expressed in the following three basic units: M = mass, L = …

Units and conversion factors within and between the two systems of measures are presented here for each dimension in a separate box. The format followed for each dimension is shown in …

If you know °C, use the equation in the last column to convert to °F.

In a system of natural units, one might ask what “unit mass” or “unit length” are. They surely will not any longer be kilograms and meters! The answer, generically, is Planck Units. These are …

pounds per square inch (psi) =

STEP 2: Multiply the original unit by the unit conversion factor. In the above examples, we cross canceled the like unit from the numerator and denominator, just like we would cancel common …