BTU to kWh Converter
Updated Formulas shown
Divide BTU by 3,412.14 to get kilowatt-hours: 100,000 BTU = 29.31 kWh. Use this for energy amounts; for heating and cooling rates (BTU per hour) use BTU/h to watts.
Formula: kilowatt-hours = BTU ÷ 3412.1416331279 (exact ratio, shown rounded)
Common values: BTU → kilowatt-hours
| BTU | kilowatt-hours |
|---|---|
| 0.000293071 kWh | |
| 0.000586142 kWh | |
| 0.000879213 kWh | |
| 0.00146536 kWh | |
| 0.00293071 kWh | |
| 0.00586142 kWh | |
| 0.00732678 kWh | |
| 0.0146536 kWh | |
| 0.0293071 kWh | |
| 0.0732678 kWh | |
| 0.146536 kWh | |
| 0.293071 kWh |
100,000 BTU in every energy unit
- 105,506,000 J
- 105,506 kJ
- 105.506 MJ
- 25,216,400 cal
- 25,216.4 kcal
- 29,307.1 Wh
- 29.3071 kWh
- 1.00024 thm
- 77,816,900 ft·lbf
How to convert BTU to kilowatt-hours
- Type the value in BTU into the converter (or into the right-hand box to go the other way).
- Divide by 3,412.1416331279 to get kilowatt-hours.
- Round to a sensible precision with the Decimals control; the table below covers the values people look up most.
British thermal unit to kilowatt-hour formula
kilowatt-hours = BTU ÷ 3412.1416331279 — 1 BTU = 0.000293071 kWh. Both units are defined exactly (NIST SP 811); the factor above is rounded to 10 decimals, and the converter uses the full-precision ratio.
BTU to kWh conversion table
| BTU | kWh | MJ |
|---|---|---|
| 1 | 2.93 × 10⁻⁴ | 0.001 |
| 100 | 0.029 | 0.106 |
| 1,000 | 0.293 | 1.055 |
| 3,412 | 1 | 3.6 |
| 5,000 | 1.465 | 5.275 |
| 10,000 | 2.931 | 10.551 |
| 20,000 | 5.861 | 21.101 |
| 25,000 | 7.327 | 26.376 |
| 50,000 | 14.654 | 52.753 |
| 75,000 | 21.98 | 79.129 |
| 100,000 | 29.307 | 105.506 |
| 250,000 | 73.268 | 263.764 |
| 500,000 | 146.536 | 527.528 |
| 1,000,000 | 293.071 | 1,055.056 |
Heating fuels in BTU and kWh
| fuel | BTU | kWh |
|---|---|---|
| Natural gas, 1 therm | 100,000 | 29.31 |
| Natural gas, 1,000 ft³ | 1,036,000 | 303.62 |
| Propane, 1 gallon | 91,452 | 26.8 |
| Heating oil, 1 gallon | 138,500 | 40.59 |
| Electricity, 1 kWh | 3,412 | 1 |
Heat content from the US Energy Information Administration; actual values vary by supplier.
Comparing heating costs
To compare fuels, convert each to cost per million BTU of delivered heat: price ÷ (BTU per unit × efficiency) × 1,000,000. Electricity at $0.16/kWh with a heat pump COP of 3 delivers heat at about $15.60 per million BTU; natural gas at $1.50/therm in a 95% furnace is about $15.80. The electricity cost calculator handles the kWh side.
Related converters & calculators
- Therms to kWh Converter1 therm = 29.3 kWh.
- BTU to Watts Converter (BTU/h)Divide BTU/h by 3.41214.
- BTU CalculatorAC and heater size for any room.
- Electricity Cost CalculatorCalculate the cost to run any appliance per day, month and year from its wattage, hours of use and your electricity rate.
- Unit ConverterEvery unit in one fast converter.
Frequently asked questions
How many kWh is 1 BTU?
0.000293 kWh. 1 kWh = 3,412.14 BTU.
How many kWh in 100,000 BTU?
29.31 kWh — roughly one therm of natural gas.
Which BTU is used here?
The International Table BTU (1,055.05585262 J), the definition NIST lists and the one HVAC ratings use.
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Estimates only. Check quantities with your supplier or contractor before ordering.