Joules to Foot Pounds
The joule is the SI unit of energy, defined as the work done by one newton over one meter. A foot-pound is the energy of one pound of force acting over one foot, used to describe bolt torque and impact energy in the US. 1 J equals ≈0.737562 ft·lbf, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to energy, measured here against energy's base unit (J) — every other energy unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
ft·lbf = J × ≈0.737562
J = ft·lbf × ≈1.35582
Worked example: 5 J × ≈0.737562 = ≈3.68781 ft·lbf.
Conversion table
| Joule (J) | Foot-pound (ft·lbf) |
|---|---|
| 1 J | ≈0.737562 ft·lbf |
| 2 J | ≈1.47512 ft·lbf |
| 3 J | ≈2.21269 ft·lbf |
| 5 J | ≈3.68781 ft·lbf |
| 10 J | ≈7.37562 ft·lbf |
| 20 J | ≈14.7512 ft·lbf |
| 25 J | ≈18.4391 ft·lbf |
| 50 J | ≈36.8781 ft·lbf |
| 100 J | ≈73.7562 ft·lbf |
| 250 J | ≈184.391 ft·lbf |
| 500 J | ≈368.781 ft·lbf |
| 1,000 J | ≈737.562 ft·lbf |
Frequently asked
- How many Foot-pounds in a joule?
- 1 J equals ≈0.737562 ft·lbf.
- How do I convert Joules to Foot-pounds?
- Multiply the value in J by ≈0.737562 to get ft·lbf. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Joule and Foot-pound are both defined by a fixed conversion factor to energy's base unit (J), so the result shown is exact to the precision displayed, not an approximation.