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Energy
BTU to Kilowatt-hours
Convert BTU (BTU) to kilowatt-hours (kWh). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 BTU = 0.000293 kWh
BTU to Kilowatt-hours Conversion Table
Common values, ready to copy:
| BTU | kilowatt-hours |
|---|---|
| 1 BTU | 0.000293 kWh |
| 2 BTU | 0.000586 kWh |
| 5 BTU | 0.001465 kWh |
| 10 BTU | 0.002931 kWh |
| 25 BTU | 0.007327 kWh |
| 50 BTU | 0.014654 kWh |
| 100 BTU | 0.029307 kWh |
| 1,000 BTU | 0.293072 kWh |
Formula
kilowatt-hours = BTU × 2.93072222e-4
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
About BTU and Kilowatt-hours
BTU (BTU): British Thermal Unit; the energy to raise one pound of water by one degree Fahrenheit; defined as exactly 1,055.06 J. Common uses: US heating and air conditioning (a 24,000 BTU air conditioner cools roughly a 1,500 sq ft room), and US natural gas billing.
Kilowatt-hours (kWh): A thousand watt-hours, or 3.6 MJ; the standard utility billing unit for residential and commercial electricity. Common uses: Electricity bills, residential and EV battery capacity (a typical EV battery is 50-100 kWh), and home solar generation.
How the conversion works
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
The exact relationship is kilowatt-hours = BTU × 2.93072222e-4, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between BTU and kilowatt-hours comes up wherever energy measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.