Power Converter

How to Convert Units of Power and Heat Flow

Conversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem:

S * C = E

Where S is our starting value, C is our conversion factor, and E is our end converted result.

To simply convert from any unit into W, for example, from 50 BTU/h, just multiply by the value in the right column in the table below.

50 BTU/h * 0.2930711 [ (W) / (BTU/h) ] = 14.653555 W

To convert from W into units in the left column divide by the value in the right column or, multiply by the reciprocal, 1/x.

14.653555 W / 0.2930711 [ (W) / (BTU/h) ] = 50 BTU/h

To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into W then divide by the factor for B to convert out of W.  Or, you can find the single factor you need by dividing the A factor by the B factor.

For example, to convert from BTU/h (th) to cal/s (th) you would multiply by 0.2928751 then divide by 4.184.  Or, multiply by 0.2928751/4.184 = 0.069998829. So, to convert directly from BTU/h (th) to cal/s (th) you multiply by 0.069998829.