A foot-pound (ft-lb) is the work done by one pound-force acting through a distance of one foot, commonly used in mechanical and engineering calculations.
Foot-pounds to Kilojoules
Convert Foot-pound (ft-lb) to Kilojoule (kJ) instantly with an exact formula, conversion table, and FAQ.
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Convert foot-pounds (ft-lb) to kilojoules (kJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
kJ = ft-lb × 0.001355817948
Results update instantly for Foot-pounds to Kilojoules conversions.
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Formula
kJ = ft-lb × 0.001355817948
ft-lb = kJ × 737.5621493
Conversion table
| 1 ft-lb | 0.001356 kJ |
| 5 ft-lb | 0.006779 kJ |
| 10 ft-lb | 0.013558 kJ |
| 20 ft-lb | 0.027116 kJ |
| 50 ft-lb | 0.067791 kJ |
| 100 ft-lb | 0.135582 kJ |
| 500 ft-lb | 0.677909 kJ |
| 1000 ft-lb | 1.355818 kJ |
Related conversions
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How the formula works
Both foot-pound and kilojoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in foot-pounds by 0.001355817948 to get kilojoules. To reverse the conversion, multiply a kilojoule value by 737.5621493 to get back to foot-pounds.
Frequently asked questions
What is Foot-pound (ft-lb)?
A foot-pound (ft-lb) is the work done by one pound-force acting through a distance of one foot, commonly used in mechanical and engineering calculations.
What is Kilojoule (kJ)?
A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
How do I convert foot-pounds to kilojoules?
Multiply the foot-pound value by 0.001355817948 to get the equivalent in kilojoules. For example, 5 ft-lb × 0.001355817948 = 0.006779 kJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.001355817948 is an exact, non-rounded value.
Can I convert kilojoules back to foot-pounds?
Yes. Divide the kilojoule value by 0.001355817948, or multiply it by 737.5621493, to get foot-pounds.
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About converting foot-pounds to kilojoules
A foot-pound (ft-lb) is the work done by one pound-force acting through a distance of one foot, commonly used in mechanical and engineering calculations. A kilojoule (kJ) equals 1,000 joules and is commonly used on nutrition labels outside the United States.
Use this calculator to move between foot-pounds and kilojoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.