BTU to Foot-pounds
Convert btu to foot-pounds instantly. 1 BTU = 778.169262266 ft·lb. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert btu to foot-pounds
To convert btu to foot-pounds, multiply by 778.169262266. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
ft·lb = BTU × 778.169262266
BTU to Foot-pounds conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| BTU | Foot-pounds |
|---|---|
| 1 BTU | 778.169262 ft·lb |
| 2 BTU | 1,556.34 ft·lb |
| 3 BTU | 2,334.51 ft·lb |
| 5 BTU | 3,890.85 ft·lb |
| 10 BTU | 7,781.69 ft·lb |
| 20 BTU | 15,563.39 ft·lb |
| 25 BTU | 19,454.23 ft·lb |
| 50 BTU | 38,908.46 ft·lb |
| 100 BTU | 77,816.93 ft·lb |
| 500 BTU | 389,084.63 ft·lb |
| 1,000 BTU | 778,169.26 ft·lb |
What is a btu?
British thermal unit, used for heating and air-conditioning capacity.
What is a foot-pound?
The energy of one pound-force acting through one foot.
The formula
ft·lb = BTU × 778.169262266
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the BTU to Foot-pounds
- Type the number of btu you want to convert.
- Read the result in foot-pounds straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked foot-pounds to btu page.
BTU to Foot-pounds — frequently asked questions
How many foot-pounds are in a btu?
One btu equals 778.169262266 ft·lb. ft·lb = BTU × 778.169262266
What is the formula to convert btu to foot-pounds?
The formula is ft·lb = BTU × 778.169262266. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert foot-pounds back to btu?
Divide instead of multiplying: one foot-pound is 0.0012850675 BTU. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this btu to foot-pounds free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the btu to foot-pounds.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error