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 Millijoules
Convert Foot-pound (ft-lb) to Millijoule (mJ) instantly with an exact formula, conversion table, and FAQ.
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Convert foot-pounds (ft-lb) to millijoules (mJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
mJ = ft-lb × 1355.817948
Results update instantly for Foot-pounds to Millijoules conversions.
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Formula
mJ = ft-lb × 1355.817948
ft-lb = mJ × 0.0007375621493
Conversion table
| 1 ft-lb | 1355.817948 mJ |
| 5 ft-lb | 6779.089742 mJ |
| 10 ft-lb | 13558.179483 mJ |
| 20 ft-lb | 27116.358967 mJ |
| 50 ft-lb | 67790.897417 mJ |
| 100 ft-lb | 135581.794833 mJ |
| 500 ft-lb | 677908.974166 mJ |
| 1000 ft-lb | 1.355818e+06 mJ |
Related conversions
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How the formula works
Both foot-pound and millijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in foot-pounds by 1355.817948 to get millijoules. To reverse the conversion, multiply a millijoule value by 0.0007375621493 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 Millijoule (mJ)?
A millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
How do I convert foot-pounds to millijoules?
Multiply the foot-pound value by 1355.817948 to get the equivalent in millijoules. For example, 5 ft-lb × 1355.817948 = 6779.089742 mJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 1355.817948 is an exact, non-rounded value.
Can I convert millijoules back to foot-pounds?
Yes. Divide the millijoule value by 1355.817948, or multiply it by 0.0007375621493, to get foot-pounds.
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About converting foot-pounds to millijoules
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 millijoule (mJ) is a metric-prefixed unit of energy equal to 10-3 joules, a fraction of a single joule, using the SI milli prefix.
Use this calculator to move between foot-pounds and millijoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.