What is British thermal unit?

A British thermal unit (BTU) is an energy unit defined as the heat needed to raise one pound of water by one degree Fahrenheit. It is used in HVAC systems, heating and cooling equipment ratings, and natural gas billing in the United States.

What is watt hour?

A watt hour is a unit of energy equal to the power of one watt sustained for one hour. It is used to measure small amounts of electrical energy consumption, particularly in battery capacities and portable electronics.

Worked examples

1 British thermal unit = 0.29307107 watt hour

1 watt hour = 3,600 joule

More Energy conversions

• Convert British thermal unit to joule
• Convert British thermal unit to kilojoule
• Convert British thermal unit to kilowatt hour
• Convert British thermal unit to calorie (thermochemical)
• Convert British thermal unit to kilocalorie (dietary)
• Convert British thermal unit to watt hour
• Convert British thermal unit to megajoule
• Convert British thermal unit to electronvolt
• Convert British thermal unit to therm (US)

Assumption: calorie means thermochemical calorie, and therm means US therm.