How many BTU are in a kilowatt-hour?

One kilowatt-hour equals 3412.142 BTU (International Table). Equivalently, 1 BTU is about 0.00029307 kWh, since 1 BTU = 1055.056 J and 1 kWh = 3,600,000 J.

Which BTU definition does this use?

It uses the International Table (IT) BTU of 1055.05585262 J, the standard for HVAC, heating and cooling ratings.

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BTU to kWh Converter

BTU to kWh — heating and cooling energy

One kilowatt-hour equals 3412.142 BTU, and one BTU is about 0.00029307 kWh. This converter changes British Thermal Units (BTU), common in HVAC and heating ratings, into kilowatt-hours (kWh) and back.

The conversion uses the International Table BTU of 1055.05585262 joules against the kilowatt-hour’s 3,600,000 joules. A 10,000 BTU air conditioner’s energy content is therefore about 2.93 kWh.

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