A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga prefix.
Gigajoules to Foot-pounds
Convert Gigajoule (GJ) to Foot-pound (ft-lb) instantly with an exact formula, conversion table, and FAQ.
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Convert gigajoules (GJ) 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 = GJ × 737562149.3
Results update instantly for Gigajoules to Foot-pounds conversions.
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Formula
ft-lb = GJ × 737562149.3
GJ = ft-lb × 1.355817948e-09
Conversion table
| 1 GJ | 7.375621e+08 ft-lb |
| 5 GJ | 3.687811e+09 ft-lb |
| 10 GJ | 7.375621e+09 ft-lb |
| 20 GJ | 1.475124e+10 ft-lb |
| 50 GJ | 3.687811e+10 ft-lb |
| 100 GJ | 7.375621e+10 ft-lb |
| 500 GJ | 3.687811e+11 ft-lb |
| 1000 GJ | 7.375621e+11 ft-lb |
Related conversions
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How the formula works
Both gigajoule and foot-pound measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigajoules by 737562149.3 to get foot-pounds. To reverse the conversion, multiply a foot-pound value by 1.355817948e-09 to get back to gigajoules.
Frequently asked questions
What is Gigajoule (GJ)?
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga 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 gigajoules to foot-pounds?
Multiply the gigajoule value by 737562149.3 to get the equivalent in foot-pounds. For example, 5 GJ × 737562149.3 = 3.687811e+09 ft-lb.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 737562149.3 is an exact, non-rounded value.
Can I convert foot-pounds back to gigajoules?
Yes. Divide the foot-pound value by 737562149.3, or multiply it by 1.355817948e-09, to get gigajoules.
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About converting gigajoules to foot-pounds
A gigajoule (GJ) is a metric-prefixed unit of energy equal to 109 joules, using the SI giga 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 gigajoules 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.