Convert foot-pounds to joules
1 ft·lb = 1.355818 J. Change the amount below, or read the formula and the reference table further down.
1 foot-pound equals
joules
1 ft·lb = 1.355818 J
The formula
Foot-pounds and joules both measure energy from the same zero, so a single multiplier does the job.
J = ft·lb × 1.35581795
Going the other way? Convert joules to foot-pounds.
Foot-pounds to joules table
Common values, rounded for reading.
| Foot-pounds (ft·lb) | Joules (J) |
|---|---|
| 1 | 1.3558 |
| 2 | 2.7116 |
| 3 | 4.0675 |
| 4 | 5.4233 |
| 5 | 6.7791 |
| 6 | 8.1349 |
| 7 | 9.4907 |
| 8 | 10.8465 |
| 9 | 12.2024 |
| 10 | 13.5582 |
| 15 | 20.3373 |
| 20 | 27.1164 |
| 25 | 33.8954 |
| 30 | 40.6745 |
| 40 | 54.2327 |
| 50 | 67.7909 |
| 75 | 101.69 |
| 100 | 135.58 |
| 250 | 338.95 |
| 500 | 677.91 |
| 1,000 | 1,355.82 |
Questions people ask
- How many joules are in a foot-pound?
- One foot-pound equals 1.35581795 joules.
- How do I convert foot-pounds to joules by hand?
- Multiply the number of foot-pounds by 1.35581795. For a rough check, 1.4 is close enough for most everyday use.
- What is 1 foot-pound in joules?
- 1 foot-pound is 1.355818 joules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.