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Energy and Power Units: The Basics

This report is a quick review of energy, power and the units used to measure them. But don't worry; it's not high school physics all over again. It's more like a Berlitz course on energy-speak - just enough to let you read the menu and maybe eavesdrop on the natives.

Because of their diverse heritage, energy and power units vary widely in size. Figure 1 graphs energy units, while Figure 2 graphs power units. Note that the vertical scale in both graphs is logarithmic; each horizontal line represents a tenfold increase over the line below.

Figure 1: Energy Units Comparison
Figure 2: Power Units Comparison

Tables 4 and 5 list conversion factors between selected units of energy and power.

Table 4: Selected Energy Units and Conversion Factors
Table 5: Selected Power Units and Conversion Factors
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