Energy conversion
1 foot-pound (ft·lb) equals 1.355817948331 joule (J). Enter any value below to convert from ft·lb to J.
Enter a value and choose units. Results update instantly.
1 ft·lb = 1.3558179483 J
| Unit | Value |
|---|---|
| Joule J | 1.3558179483 |
| Kilojoule kJ | 0.0013558179 |
| Thermochemical calorie cal | 0.3240482668 |
| Kilocalorie kcal | 0.0003240483 |
| Watt-hour Wh | 0.0003766161 |
| Kilowatt-hour kWh | 0.0000003766 |
| BTU (International Table) BTUₕᵀ | 0.0012850675 |
| Foot-pound ft·lb | 1 |
| Electronvolt eV | 8.4623500278e18 |
Formula
Use this relationship for a direct conversion:
2 ft·lb = 2.7116358967 J.
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
Quick reference
| Foot-pound (ft·lb) | Joule (J) |
|---|---|
| 0.01 | 0.0135581795 |
| 0.1 | 0.1355817948 |
| 1 | 1.3558179483 |
| 2 | 2.7116358967 |
| 5 | 6.7790897417 |
| 10 | 13.5581794833 |
| 25 | 33.8954487083 |
| 50 | 67.7908974166 |
| 100 | 135.5817948331 |
| 1,000 | 1,355.8179483314 |
From unit
Work from one pound-force through one foot.
Symbol: ft·lb
To unit
The SI unit of energy, equal to one newton meter.
Symbol: J
Keep converting
Source
Definitions are checked against NIST SP 811: Energy units. Calculations use full internal precision before display rounding.
View the complete energy converterQuestions
Use the formula J = ft·lb x 1.355817948331. 1 foot-pound (ft·lb) equals 1.355817948331 joule (J).
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
