Kilowatt-Hours to BTU Converter (kWh to BTU)
1 kWh = 3,412.14 BTU. Express electricity use, EV battery energy or solar output in British thermal units to compare it with fuels, with both charts.
British Thermal Unit (BTU) = Kilowatt-Hour (kWh) × 3412.14163313
Kilowatt-Hour (kWh): A kilowatt-hour (kWh) is 1,000 watt-hours, exactly 3.6 million joules. Electricity bills charge by the kWh, and electric-car battery sizes are quoted in kWh.
British Thermal Unit (BTU): This converter uses the International Table British thermal unit, exactly 1,055.05585262 J. A BTU is an energy unit; a heating or cooling rate needs a time denominator such as BTU per hour.
| Kilowatt-Hour (kWh) | British Thermal Unit (BTU) |
|---|---|
| 1 | 3412.14163313 |
| 5 | 17060.7081656 |
| 10 | 34121.4163313 |
| 25 | 85303.5408282 |
| 50 | 170607.081656 |
| 100 | 341214.163313 |
Electricity bills, smart meters, EV batteries and solar inverters count energy in kilowatt-hours, but US heating equipment, fuel statistics and many engineering tables use British thermal units. Converting kWh to BTU sets an electric heater or heat pump against a gas or oil furnace, or lets you read EIA energy data alongside a power bill.
A kilowatt-hour is 3.6 million joules and the International Table BTU is 1,055.05585262 joules, so 1 kWh is about 3,412.14 BTU; EIA tables round this to 3,412. The EPA relies on a similar equivalence for electric cars, treating 33.7 kWh as the energy in a gallon of gasoline when it calculates MPGe.
How to use this tool
- Type a value in the Kilowatt-Hour box to see it in British thermal units, or type in the British Thermal Unit box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Energy converter.
Formula
British Thermal Unit (BTU) = Kilowatt-Hour (kWh) × 3412.14163313
Kilowatt-Hour (kWh) = British Thermal Unit (BTU) × 0.000293071070172
Both factors come from exact definitions: 1 british thermal unit = 0.000293071070172 kilowatt-hours and 1 kilowatt-hour = 3412.14163313 British thermal units (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
33.7 kWh × 3412.14163313 ≈ 114989 BTU
50000 BTU × 0.000293071070172 ≈ 14.6536 kWh
Kilowatt-Hour to British Thermal Unit chart
Common values from kilowatt-hours to British thermal units, rounded to four decimal places.
| Kilowatt-Hour (kWh) | British Thermal Unit (BTU) |
|---|---|
| 0.1 | 341.2142 |
| 0.2 | 682.4283 |
| 0.25 | 853.0354 |
| 1 | 3,412.14 |
| 1.5 | 5,118.21 |
| 3 | 10,236.42 |
| 7 | 23,884.99 |
| 12 | 40,945.7 |
| 24 | 81,891.4 |
| 29.3 | 99,975.75 |
| 33.7 | 114,989.17 |
| 50 | 170,607.08 |
| 75 | 255,910.62 |
| 150 | 511,821.25 |
| 250 | 853,035.41 |
| 400 | 1,364,856.65 |
| 750 | 2,559,106.23 |
| 900 | 3,070,927.47 |
| 1,000 | 3,412,141.63 |
| 5,000 | 17,060,708.17 |
| 10,000 | 34,121,416.33 |
British Thermal Unit to Kilowatt-Hour chart
The reverse direction for values people often look up.
| British Thermal Unit (BTU) | Kilowatt-Hour (kWh) |
|---|---|
| 500 | 0.1465 |
| 2,500 | 0.7327 |
| 8,000 | 2.3446 |
| 15,000 | 4.3961 |
| 30,000 | 8.7921 |
| 60,000 | 17.5843 |
| 125,000 | 36.6339 |
| 200,000 | 58.6142 |
| 2,000,000 | 586.1421 |
| 3,412,000 | 999.9585 |
Electricity amounts in kWh
| Item | Kilowatt-Hour (kWh) | British Thermal Unit (BTU) |
|---|---|---|
| 3 kW kettle running for 4 minutes | 0.2 | 682.4283 |
| 100 W bulb left on for 10 hours | 1 | 3,412.14 |
| 1,500 W space heater running for one hour | 1.5 | 5,118.21 |
| One kilowatt sustained for a full day | 24 | 81,891.4 |
| EPA energy equivalent of one gallon of gasoline | 33.7 | 114,989.17 |
| One megawatt-hour | 1,000 | 3,412,141.63 |
Quick mental estimate
Multiply by 3,400, or by 34 and add two zeros: 33.7 kWh → about 114,600 BTU. The shortcut is about 0.4% low; the exact factor gives 114,989 BTU.
Use the converter or the charts when the exact figure matters.
The two units
Kilowatt-Hour (kWh): A kilowatt-hour (kWh) is 1,000 watt-hours, exactly 3.6 million joules. Electricity bills charge by the kWh, and electric-car battery sizes are quoted in kWh.
British Thermal Unit (BTU): This converter uses the International Table British thermal unit, exactly 1,055.05585262 J. A BTU is an energy unit; a heating or cooling rate needs a time denominator such as BTU per hour.
Frequently asked questions
How many BTU are in one kWh?
About 3,412.14 BTU. Because a kWh is exactly 3,600,000 J and a BTU is exactly 1,055.05585262 J, the ratio is fixed and does not depend on how the electricity was generated.
Does a heat pump turn 1 kWh into 3,412 BTU of heat?
Usually more. A heat pump moves heat in from outside air or the ground, so 1 kWh of electricity can deliver two to four times 3,412 BTU, depending on the unit and the weather. A resistance heater delivers exactly the energy it draws.
How do I compare an electric bill with a gas bill?
Convert both to the same unit. A therm of gas is 100,000 BTU, about 29.3 kWh, so divide your kWh by 29.3 to express electricity in therms, or use the therms to kWh converter.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/kilowatt-hour-to-btu-converter/
Cite or embed this tool
kakaoCalc. (2026, November 8). Kilowatt-Hours to BTU Converter (kWh to BTU). https://kakao.mobile/tools/kilowatt-hour-to-btu-converter/
“Kilowatt-Hours to BTU Converter (kWh to BTU).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/kilowatt-hour-to-btu-converter/.
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