Foot-Pounds to Joules Converter
Convert Foot-Pounds to Joules with the exact conversion factor, a worked example and a quick-reference table. Runs entirely in your browser.
This converter turns Foot-Pounds into Joules instantly using the standard definition of both units. It includes the formula, a worked example, and a quick table for common amounts, and it works for any value you type — including decimals and negatives where they make sense.
Quick reference — Foot-Pounds to Joules
How to use this calculator
- Enter the value in Foot-Pounds in the input box.
- Read the result in Joules — it updates as you type.
- Use the Swap button to convert in the opposite direction.
- Check the quick-reference table for common Foot-Pounds amounts.
The formula
Joules = Foot-Pounds × 1.35582
Worked example
100 ft·lb = 135.582 J — in full, 100 Foot-Pounds converts to 135.582 Joules. Food energy, electricity bills and heating are the everyday jobs for this conversion.
Frequently Asked Questions
How do I convert Foot-Pounds to Joules?
Multiply the value in Foot-Pounds by 1.35582. For example, 100 Foot-Pounds × 1.35582 = 135.582 Joules. To go the other way, divide by 1.35582 instead — or press Swap in the converter above.
How many Joules are in one Foot-Pound?
One Foot-Pound equals 1.35582 Joules. Scaling up, 10 Foot-Pounds = 13.5582 Joules and 100 Foot-Pounds = 135.582 Joules. The converter uses the full-precision factor, so typed values are more precise than the rounded figure quoted here.
Which is bigger, a Foot-Pound or a Joule?
A Foot-Pound is bigger. One Foot-Pound equals 1.35582 Joules, while one Joule is only 0.737562 Foot-Pounds. So a measurement that looks larger in Joules is reflecting the scale difference, not an error.
What is 100 Foot-Pounds in Joules?
100 Foot-Pounds is 135.582 Joules. The math is 100 × 1.35582 = 135.582. Try any other amount in the converter above and the result updates as you type.