Convert Foot-pounds to Joules
1 foot-pound = 1.3558179 joules. Multiply the number of foot-pounds by 1.35581794833.
Foot-pounds to Joules table
| Foot-pounds | Joules |
|---|---|
| 1 ft·lb | 1.3558179 J |
| 2 ft·lb | 2.7116359 J |
| 3 ft·lb | 4.0674538 J |
| 4 ft·lb | 5.4232718 J |
| 5 ft·lb | 6.7790897 J |
| 10 ft·lb | 13.558179 J |
| 20 ft·lb | 27.116359 J |
| 25 ft·lb | 33.895449 J |
| 50 ft·lb | 67.790897 J |
| 100 ft·lb | 135.58179 J |
| 500 ft·lb | 677.90897 J |
| 1000 ft·lb | 1,355.8179 J |
Foot-pounds to Joules in your head
Multiply by 4, then divide by 3.
That lands within 2% of the exact value.
10 ft·lb → 13.3333 J in your head, 13.5582 J exactly.
About these units
The foot-pound (ft·lb) is an imperial unit of energy & work, equal to 1.3558179 joules.
The joule (J) is an SI base or derived unit of energy & work.
Going the other way, 1 joule = 0.73756215 foot-pounds. Diet calories, electricity bills in kilowatt-hours, boiler ratings in BTU and particle physics in electronvolts are all the same physical quantity. Convert energy across every scale from the atomic to the industrial.
Frequently asked
- How many joules are in a foot-pound?
- 1 foot-pound = 1.3558179 joules.
- How do you convert foot-pounds to joules?
- Multiply the number of foot-pounds by 1.35581794833.
- What is 10 ft·lb in J?
- 10 ft·lb = 13.558179 J.