Energy unit converter
Convert any amount of energy between common electrical, thermal and fuel units.
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How it is calculated
1 kWh = 3.6 MJ = 860 kcal = 3412 BTU
1 therm = 100 000 BTU = 29.3 kWh 1 toe = 41.868 GJ = 11 630 kWh
kWh is used for electricity, kcal for food and heating, BTU and therms for HVAC and natural gas in the US, and toe in energy statistics.
Frequently asked questions
How many BTU in a kWh?
About 3412 BTU. A 12,000 BTU/h air conditioner provides roughly 3.5 kW of cooling.
How many kWh in a therm?
1 US therm is about 29.3 kWh.
How many calories in a kWh?
1 kWh equals 860 kcal (food calories).