Joule to Foot-pound Converter
One Joule equals 0.7375621493 Foot-pound (1 J = 0.7375621493 ft-lb). Multiply a Joule value by 0.7375621493 to get the equivalent in Foot-pound. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
ft-lb = J × 0.7375621493
Multiply the Joule value by 0.7375621493 to get the equivalent value in Foot-pound.
Example Conversions
1 Joule (J)
0.7375621493 Foot-pound (ft-lb)
5 Joule (J)
3.687810746 Foot-pound (ft-lb)
10 Joule (J)
7.375621493 Foot-pound (ft-lb)
25 Joule (J)
18.43905373 Foot-pound (ft-lb)
100 Joule (J)
73.75621493 Foot-pound (ft-lb)
Conversion Table
| Joule (J) | Foot-pound (ft-lb) |
|---|---|
| 0.1 | 0.07375621493 |
| 0.5 | 0.3687810746 |
| 1 | 0.7375621493 |
| 2 | 1.475124299 |
| 5 | 3.687810746 |
| 10 | 7.375621493 |
| 25 | 18.43905373 |
| 50 | 36.87810746 |
| 100 | 73.75621493 |
| 250 | 184.3905373 |
| 500 | 368.7810746 |
| 1000 | 737.5621493 |
How to Convert Manually
Use these steps to convert Joule values to Foot-pound without the calculator.
- Write down the value in Joule (J) that you want to convert.
- Multiply that value by 0.7375621493.
- For example, 10 Joule × 0.7375621493 = 7.375621493 Foot-pound.
- Label the result as Foot-pound (ft-lb).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Joule and one Foot-pound.
About Joule and Foot-pound
The joule is the SI derived unit of energy — the work done by a force of one newton over one meter. Physics, chemistry, and food labeling outside the US build on it. The foot-pound is about 1.3558 joules — the work of one pound-force through one foot. US mechanical engineering and firearm muzzle energy use foot-pounds. One Joule equals 0.7375621493 Foot-pound (1 J = 0.7375621493 ft-lb). Joule to Foot-pound conversion comes up most often in physics and engineering calculations and in food energy labeling outside the US, typically when figures need restating for US mechanical engineering.
Precision and Rounding: Energy factors mix exact definitions (1 kWh = 3,600,000 J; 1 cal = 4.184 J thermochemical) with measured conventions (1 BTU ≈ 1,055.056 J). Nutrition and utility bills round to whole units; engineering heat calculations should keep the full factor until the final step.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Joule equals 11.06343224 Foot-pound.
15 J × 0.7375621493 = 11.06343224 ft-lb
FAQ
How do I convert Joule to Foot-pound?
Multiply the Joule value by 0.7375621493 to get the equivalent value in Foot-pound.
What is the formula for Joule to Foot-pound?
The formula is ft-lb = J × 0.7375621493.
How many Foot-pound are in 1 Joule?
1 Joule equals 0.7375621493 Foot-pound.
Can I convert Foot-pound back to Joule?
Yes. 1 Foot-pound equals 1.355817948 Joule, and the related converter can reverse the calculation.
What are common names for Joule and Foot-pound?
Joule is shown as J and may also be searched as joule, joules. Foot-pound is shown as ft-lb and may also be searched as foot-pound, foot pound, ft·lb.
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