Foot-pound to Joule Converter
Convert Foot-pound (ft-lb) to Joule (J) instantly with this energy converter. Use the calculator above, then check the formula, worked examples, table, and manual steps below.
Formula
J = ft-lb × 1.355817948
Multiply the Foot-pound value by 1.355817948 to get the equivalent value in Joule.
Example Conversions
1 Foot-pound (ft-lb)
1.355817948 Joule (J)
5 Foot-pound (ft-lb)
6.779089741 Joule (J)
10 Foot-pound (ft-lb)
13.55817948 Joule (J)
25 Foot-pound (ft-lb)
33.89544871 Joule (J)
100 Foot-pound (ft-lb)
135.5817948 Joule (J)
Conversion Table
| Foot-pound (ft-lb) | Joule (J) |
|---|---|
| 0.1 | 0.1355817948 |
| 0.5 | 0.6779089741 |
| 1 | 1.355817948 |
| 2 | 2.711635897 |
| 5 | 6.779089741 |
| 10 | 13.55817948 |
| 25 | 33.89544871 |
| 50 | 67.79089742 |
| 100 | 135.5817948 |
| 250 | 338.9544871 |
| 500 | 677.9089741 |
| 1000 | 1355.817948 |
How to Convert Manually
Use these steps to convert Foot-pound values to Joule without the calculator.
- Write down the value in Foot-pound (ft-lb) that you want to convert.
- Multiply that value by 1.355817948.
- For example, 10 Foot-pound × 1.355817948 = 13.55817948 Joule.
- Label the result as Joule (J).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Foot-pound and one Joule.
About Foot-pound and Joule
Converting Foot-pound to Joule is common in energy applications, engineering, and everyday life. Whether you are translating specifications from international manuals, completing homework, or planning a project, having an accurate ft-lb to J calculation ensures your measurements are correct.
The Foot-pound is a unit of energy. One Foot-pound equals 1.355817948 J in this converter's base scale.
The Joule is also a energy unit. One Joule equals 1 J in the same base scale.
Precision and Rounding: When converting Foot-pound to Joule, you may encounter long decimal numbers. For most practical purposes, rounding to two or three decimal places is sufficient. However, for machining, scientific research, or strict engineering tolerances, you should maintain as much precision as possible before your final calculation.
Worked Example
15 Foot-pound equals 20.33726922 Joule.
15 ft-lb × 1.355817948 = 20.33726922 J
FAQ
How do I convert Foot-pound to Joule?
Multiply the Foot-pound value by 1.355817948 to get the equivalent value in Joule.
What is the formula for Foot-pound to Joule?
The formula is J = ft-lb × 1.355817948.
How many Joule are in 1 Foot-pound?
1 Foot-pound equals 1.355817948 Joule.
Can I convert Joule back to Foot-pound?
Yes. 1 Joule equals 0.7375621493 Foot-pound, and the related converter can reverse the calculation.
What are common names for Foot-pound and Joule?
Foot-pound is shown as ft-lb and may also be searched as foot-pound, foot pound, ft·lb. Joule is shown as J and may also be searched as joule, joules.
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