Foot-pounds to joules converter
Joules (J)
1 foot-pound = 1.355817948 joules
How to convert foot-pounds to joules
J = ft·lbf × 1.35581794833
Multiply the number of foot-pounds by 1.35581794833 to get joules. Going the other way, divide by 1.35581794833 (or multiply by 0.737562149277).
One foot-pound is exactly defined as 1.35581794833 joules (to 12 significant figures), and one joule is 0.737562149277 foot-pounds.
Worked examples
- Convert 5 foot-pounds: 5 × 1.35581794833 = 6.779089742 6.779089742 joules.
- Convert 12.5 foot-pounds: 12.5 × 1.35581794833 = 16.94772435 16.94772435 joules.
- Convert 250 foot-pounds: 250 × 1.35581794833 = 338.9544871 338.9544871 joules.
Quick-reference table
| ft·lbf | J |
|---|---|
| 1 | 1.355817948 |
| 2 | 2.711635897 |
| 3 | 4.067453845 |
| 5 | 6.779089742 |
| 10 | 13.55817948 |
| 15 | 20.33726922 |
| 20 | 27.11635897 |
| 25 | 33.89544871 |
| 50 | 67.79089742 |
| 75 | 101.6863461 |
| 100 | 135.5817948 |
| 1,000 | 1,355.817948 |
| J | ft·lbf |
|---|---|
| 1 | 0.7375621493 |
| 2 | 1.475124299 |
| 3 | 2.212686448 |
| 5 | 3.687810746 |
| 10 | 7.375621493 |
| 15 | 11.06343224 |
| 20 | 14.75124299 |
| 25 | 18.43905373 |
| 50 | 36.87810746 |
| 75 | 55.3171612 |
| 100 | 73.75621493 |
| 1,000 | 737.5621493 |
Related conversions
Frequently asked questions
How many joules are in 1 foot-pound?
1 foot-pound equals 1.355817948 joules.
What is the formula to convert foot-pounds to joules?
Use J = ft·lbf × 1.35581794833. Multiply the number of foot-pounds by 1.35581794833 to get joules. Going the other way, divide by 1.35581794833 (or multiply by 0.737562149277).
What is 100 foot-pounds in joules?
100 foot-pounds is 135.5817948 joules.