Foot-pound-force to Joule Converter
1 foot-pound-force is exactly 1.3558179483314004 joules. Convert foot-pounds-force (ft·lbf) to joules (J) below: type a value and the result updates as you type.
ft·lbf to J calculator
Result
Foot-pound-force to Joule conversion
1 ft·lbf = 1.3558179483314004 Jone foot-pound-force in joules
1 J ≈ 0.7375621493 ft·lbfone joule in foot-pounds-force
Foot-pound-force (ft·lbf): Work of one pound-force acting through one foot: 4.4482216152605 N × 0.3048 m.
Joule (J): SI derived unit: one newton-meter.
Source:Foot-pound-force: NIST Special Publication 811 (2008), Appendix B.8; Joule: SI Brochure, 9th edition (BIPM, 2019)
How to convert foot-pounds-force to joules
To convert foot-pounds-force to joules, multiply the number of foot-pounds-force by 1.3558179483314004.
Formula
J = ft·lbf × 1.3558179483314004
Examples
- 5 ft·lbf = 5 × 1.3558179483314004 = 6.779089741657002 J
- 25 ft·lbf = 25 × 1.3558179483314004 = 33.89544870828501 J
- 100 ft·lbf = 100 × 1.3558179483314004 = 135.58179483314004 J
Foot-pound-force to Joule conversion table
| Foot-pound-force (ft·lbf) | Joule (J) |
|---|---|
| 0.1 ft·lbf | 0.13558179483314004 J |
| 0.5 ft·lbf | 0.6779089741657002 J |
| 1 ft·lbf | 1.3558179483314004 J |
| 2 ft·lbf | 2.7116358966628008 J |
| 3 ft·lbf | 4.0674538449942012 J |
| 5 ft·lbf | 6.779089741657002 J |
| 10 ft·lbf | 13.558179483314004 J |
| 20 ft·lbf | 27.116358966628008 J |
| 25 ft·lbf | 33.89544870828501 J |
| 50 ft·lbf | 67.79089741657002 J |
| 100 ft·lbf | 135.58179483314004 J |
| 250 ft·lbf | 338.9544870828501 J |
| 500 ft·lbf | 677.9089741657002 J |
| 1000 ft·lbf | 1355.8179483314004 J |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many joules are in one foot-pound-force?
- One foot-pound-force is exactly 1.3558179483314004 joules.
- How do I convert joules to foot-pounds-force?
- To convert joules to foot-pounds-force, divide the number of joules by 1.3558179483314004. The formula is ft·lbf = J ÷ 1.3558179483314004.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 1.3558179483314004 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a foot-pound-force or a joule?
- A foot-pound-force is 1.3558179483314004 times larger than a joule. In other words, a joule is about 0.7375621493 of a foot-pound-force.