A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
Femtojoules to Foot-pounds
Convert Femtojoule (fJ) to Foot-pound (ft-lb) instantly with an exact formula, conversion table, and FAQ.
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Convert femtojoules (fJ) to foot-pounds (ft-lb) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
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.
ft-lb = fJ × 7.375621493e-16
Results update instantly for Femtojoules to Foot-pounds conversions.
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Formula
ft-lb = fJ × 7.375621493e-16
fJ = ft-lb × 1.355817948e+15
Conversion table
| 1 fJ | 7.375621e-16 ft-lb |
| 5 fJ | 3.687811e-15 ft-lb |
| 10 fJ | 7.375621e-15 ft-lb |
| 20 fJ | 1.475124e-14 ft-lb |
| 50 fJ | 3.687811e-14 ft-lb |
| 100 fJ | 7.375621e-14 ft-lb |
| 500 fJ | 3.687811e-13 ft-lb |
| 1000 fJ | 7.375621e-13 ft-lb |
Related conversions
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How the formula works
Both femtojoule and foot-pound measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtojoules by 7.375621493e-16 to get foot-pounds. To reverse the conversion, multiply a foot-pound value by 1.355817948e+15 to get back to femtojoules.
Frequently asked questions
What is Femtojoule (fJ)?
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix.
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.
How do I convert femtojoules to foot-pounds?
Multiply the femtojoule value by 7.375621493e-16 to get the equivalent in foot-pounds. For example, 5 fJ × 7.375621493e-16 = 3.687811e-15 ft-lb.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 7.375621493e-16 is an exact, non-rounded value.
Can I convert foot-pounds back to femtojoules?
Yes. Divide the foot-pound value by 7.375621493e-16, or multiply it by 1.355817948e+15, to get femtojoules.
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About converting femtojoules to foot-pounds
A femtojoule (fJ) is a metric-prefixed unit of energy equal to 10-15 joules, a fraction of a single joule, using the SI femto prefix. 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.
Use this calculator to move between femtojoules and foot-pounds accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.