What is joule?

The joule is the SI base unit of energy. It is the standard unit for work, heat, and electrical energy in physics, engineering, and scientific measurement worldwide.

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 joule = 0.00094782 British thermal unit

1 British thermal unit = 1,055.05585262 joule

More Energy conversions

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

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