Foot-pounds to Joules Converter (ft·lbf to J)
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Formula
To convert foot-pounds to joules, multiply the value by 1.35581795.
J = ft·lbf × 1.35581795
Example calculation
Convert 5 ft·lbf to J:
5 ft·lbf × 1.35581795 = 6.77909 J
Conversion table
| ft·lbf | 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 |
| 35 | 47.4536 |
| 40 | 54.2327 |
| 45 | 61.0118 |
| 50 | 67.7909 |
| 55 | 74.5700 |
| 60 | 81.3491 |
| 65 | 88.1282 |
| 70 | 94.9073 |
| 75 | 101.6863 |
| 80 | 108.4654 |
| 85 | 115.2445 |
| 90 | 122.0236 |
| 95 | 128.8027 |
| 100 | 135.5818 |
| 200 | 271.1636 |
| 500 | 677.9090 |
| 1000 | 1355.8179 |
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About the units
- Foot-pound (ft·lbf)
- Used for torque and work in US engineering. About 1.3558179 joules.
- Joule (J)
- The SI unit of energy, one newton-metre, named after James Prescott Joule.
Frequently asked questions
- How do I convert foot-pounds to joules?
- To convert foot-pounds to joules, multiply the value by 1.35581795.
- How many joules are in 1 foot-pound?
- 1 foot-pound equals 1.35582 J.
- How many joules are in 10 foot-pounds?
- 10 ft·lbf equals 13.5582 J.
- How do I convert joules back to foot-pounds?
- Use the reverse converter: 1 joule equals 0.737562 ft·lbf.
- Is this converter accurate?
- Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.
Related conversions
- Reverse conversion: joules → foot-pounds
- joules → kilojoules
- kilojoules → joules
- joules → calories
- calories → joules
- joules → kilocalories
- kilocalories → joules
- joules → watt-hours
- watt-hours → joules