BTU is a measure of energy, whereas watts is a measure of power. Power being the time rate consumption of energy. 1 BTU is about 1055 joules, and 1 watt is 1 joule per second. So 1 BTU is equivalent to the energy consumed by a 60 watt light bulb in about 18 seconds.
Yeah, I get 1.108x[10^(-8)] but it should be reported as 1x[10^(-8)] or 1.11x[10^(-8)] since there is only one significant figure or three significant figures in 100w and 100 mS, we don't know. . .
One of the more common conversions is
1 kWh = 3412 BTU/hour
With that simple conversion, you can compare the difference and efficiencies of electric vs gas vs oil, etc.
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