Convert foot-pounds to joules
Foot-pound (ft·lb) to joule (J). One foot-pound equals 1.3558 joules.
Formula
Foot-pound to joule conversion table
| Foot-pounds | Joules | Joules | Foot-pounds |
|---|---|---|---|
| 1 ft·lb | 1.3558 J | 1 J | 0.737562 ft·lb |
| 2 ft·lb | 2.7116 J | 2 J | 1.4751 ft·lb |
| 3 ft·lb | 4.0675 J | 3 J | 2.2127 ft·lb |
| 5 ft·lb | 6.7791 J | 5 J | 3.6878 ft·lb |
| 10 ft·lb | 13.5582 J | 10 J | 7.3756 ft·lb |
| 20 ft·lb | 27.1164 J | 20 J | 14.7512 ft·lb |
| 50 ft·lb | 67.7909 J | 50 J | 36.8781 ft·lb |
| 100 ft·lb | 135.58 J | 100 J | 73.7562 ft·lb |
| 500 ft·lb | 677.91 J | 500 J | 368.78 ft·lb |
| 1000 ft·lb | 1355.82 J | 1000 J | 737.56 ft·lb |
To convert foot-pounds to joules, multiply the number of foot-pounds by 1.3558. One foot-pound equals 1.3558 joules, and one joule equals 0.737562 foot-pounds, so the relationship is fixed and exact. As a worked example, 10 ft·lb comes to 13.5582 J. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a energy conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common foot-pound values already worked out in joules, plus the reverse joule to foot-pound direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many joules are in a foot-pound?
One foot-pound equals 1.3558 joules. The ratio is constant, so you can multiply any number of foot-pounds by 1.3558 to get joules.
What is the formula to convert foot-pounds to joules?
Use joules = foot-pounds × 1.3558. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert joules back to foot-pounds?
Go the other way by using one joule equals 0.737562 foot-pounds. You can also press the swap button in the converter above to flip the direction in one click.
Is this foot-pound to joule converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.