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This tool provides equivalent-value calculations for energy between a variety of measurement units, including British Thermal Units (BTU), Joules (J), Kilowatt-hours (kWh), Therms (THM) and Calories (both nutritional and Thermochemical).

British Thermal Units
BTU
Joules
J
Kilowatt-hour
kWh
Therm
THM
Calorie (Nutritional)
Cal
Calorie (Thermochemical)
cal

How many joules are in one BTU?

1 BTU = 1055.05585262 J

How many BTU’s are in one joule?

1 Joule =0.00094781712 BTU