Kilowatt Hours to British Thermal Units
Convert kilowatt hours to British thermal units instantly — one kilowatt-hour is 3412.14 British thermal units.
| Kilowatt Hours | British Thermal Units |
|---|---|
| 1 kWh | 3412.141633 BTU |
| 2 kWh | 6824.283266 BTU |
| 3 kWh | 10236.424899 BTU |
| 5 kWh | 17060.708166 BTU |
| 10 kWh | 34121.416331 BTU |
| 25 kWh | 85303.540828 BTU |
| 50 kWh | 170607.081656 BTU |
| 100 kWh | 341214.163313 BTU |
How to use
- Enter a value in the Kilowatt Hours field.
- The British Thermal Units figure appears immediately — no button to press.
- Typing in the British Thermal Units field converts back to Kilowatt Hours the same way.
- Use the reference table for the values that come up most often.
Kilowatt Hours to British Thermal Units formula
The factor from kilowatt hours to British thermal units is 3412.14163.
BTU = kWh × 3412.14163
Why this factor: the kilowatt-hour and the British thermal unit are both defined against the joule, so dividing one definition by the other gives 3412.14163 directly. Both definitions are set out in full below.
To go the other way, divide by 3412.14163 — or use the British Thermal Units to Kilowatt Hours converter, which is the same calculation reversed.
Worked example
Take 100 kWh and multiply by the factor 3412.14163: the result is 341214.163313 BTU.
100 kWh × 3412.14163 = 341214.163313 BTU
The converter above does this for any value you type, in either direction.
What is a kilowatt-hour?
A kilowatt-hour is the standard billing unit for electricity — one kilowatt drawn for one hour.
Definition: Exactly 3.6 megajoules.
Where it is used: Electricity bills worldwide, solar generation figures, and electric vehicle battery capacity.
What is a British thermal unit?
A BTU is the energy needed to raise one pound of water by one degree Fahrenheit.
Definition: The international-table BTU is about 1,055.056 joules.
Where it is used: US heating and air-conditioning capacity ratings, natural gas pricing, and boiler output.
Worth knowing: Air-conditioner ratings quoted as 'BTU' are really BTU per hour — a rate of cooling, not a quantity of energy.
Kilowatt Hours vs British Thermal Units
The kilowatt-hour is a specialized unit while the British thermal unit is a US customary unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many British thermal units are in a kilowatt-hour?
One kilowatt-hour equals 3412.14163 British thermal units.
What is the formula to convert kilowatt hours to British thermal units?
Multiply the number of kilowatt hours by 3412.14163. To reverse it, divide by 3412.14163 instead.
How do I convert British thermal units back to kilowatt hours?
Divide by 3412.14163, which is the same as multiplying by 0.00029307107.
How many British thermal units are in 10 kilowatt hours?
10 kWh works out to 34121.416331 BTU.
Is there anything to watch out for with British thermal units?
Air-conditioner ratings quoted as 'BTU' are really BTU per hour — a rate of cooling, not a quantity of energy.
How is the kilowatt-hour defined?
Exactly 3.6 megajoules.