Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Kilowatt-hours (kWh)
3.5169
Same number read as kilowatt-hours → btu
40945709.4015
1 BTU in kWh
0.000293
1 kWh in BTU
3412.142450
10× your value in kWh
35.169
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter value in btu (BTU).
- 2Read your kilowatt-hours (kwh) on the right — it updates as you type.
- 3Hit Share to keep the scenario or send it to someone.
About this calculator
Air conditioner capacity is rated in BTU/hr; 12,000 BTU/hr is one ton of cooling. Enter a value in btu and this converter returns kilowatt-hours along with the reverse direction, so you can sanity-check either way without re-typing.
Worked example
Using the values the calculator loads with:
Inputs
- Value in btu: 12000 BTU
Results
- Kilowatt-hours (kWh): 3.5169
- Same number read as kilowatt-hours → btu: 40,945,709.4015
- 1 BTU in kWh: 0.000293
- 1 kWh in BTU: 3,412.14245
- 10× your value in kWh: 35.169
What each field means
Inputs
- Value in btu (BTU)
- The value in btu used in the calculation, measured in BTU. Starts at 12000 BTU so you have a working example on load.
Results
- Kilowatt-hours (kWh)
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Same number read as kilowatt-hours → btu
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 1 BTU in kWh
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 1 kWh in BTU
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 10× your value in kWh
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the btu to kilowatt-hours converter work?
Air conditioner capacity is rated in BTU/hr; 12,000 BTU/hr is one ton of cooling. Enter a value in btu and this converter returns kilowatt-hours along with the reverse direction, so you can sanity-check either way without re-typing. The underlying maths is: Kilowatt-hours = BTU × 0.000293071000
What do I need to enter?
Just one value: value in btu. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the kilowatt-hours (kwh) result mean?
It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary.
Who is this tool for?
It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). BTU to Kilowatt-hours Converter. Retrieved from https://www.revenuelab.fyi/toolbox/btu-to-kwh
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/btu-to-kwh" target="_blank" rel="noopener">BTU to Kilowatt-hours Converter — RevenueLab</a> (2026).</p>
Source: [BTU to Kilowatt-hours Converter — RevenueLab](https://www.revenuelab.fyi/toolbox/btu-to-kwh) (2026).