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Energy
Kilowatt-hours to BTU
Convert kilowatt-hours (kWh) to BTU (BTU). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 kWh = 3412.13 BTU
Kilowatt-hours to BTU Conversion Table
Common values, ready to copy:
| kilowatt-hours | BTU |
|---|---|
| 1 kWh | 3412.13 BTU |
| 2 kWh | 6824.26 BTU |
| 5 kWh | 17060.64 BTU |
| 10 kWh | 34121.28 BTU |
| 25 kWh | 85303.21 BTU |
| 50 kWh | 170606.41 BTU |
| 100 kWh | 341212.82 BTU |
| 1,000 kWh | 3.4121e+6 BTU |
Formula
BTU = kilowatt-hours × 3.41212822e+3
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 Kilowatt-hours and BTU
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.
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.
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 BTU = kilowatt-hours × 3.41212822e+3, 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 kilowatt-hours and BTU 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.