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 kilocalorie (dietary)?

A kilocalorie, written as Calorie with a capital C in nutrition contexts, is a unit of energy equal to 1,000 thermochemical calories. It is the standard unit used to express the energy content of food on nutrition labels globally.

Worked examples

1 British thermal unit = 0.2521644 kilocalorie (dietary)

1 kilocalorie (dietary) = 4,184 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.