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.

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.

Worked examples

1 watt hour = 3.41214163 British thermal unit

1 British thermal unit = 1,055.05585262 joule

More Energy conversions

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

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