Gigajoule is 1000000000 joule units.
Gigajoules to Foot-pounds Converter — GJ to ft-lb
Convert Gigajoule (GJ) to Foot-pound (ft-lb) using the exact conversion factor (1 gigajoule = 737,562,149.3 foot-pound). See the formula, worked examples, and conversion table.
Gigajoules to Foot-pounds converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Work from one pound-force over one foot.
Result = input x 1e+9 / 1.355817948.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Gigajoules to Foot-pounds
Gigajoule and Foot-pound both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Gigajoule is 1000000000 joule units, and work from one pound-force over one foot.
Formula
foot-pounds = gigajoules × 737562149.277
This factor comes from each unit's defined relationship to the category's base unit: 1 gigajoule equals 1000000000 base units, and 1 foot-pound equals 1.35581794833 base units, so dividing one by the other gives the direct gigajoule-to-foot-pound factor of 737562149.277.
Simple example
1 GJ × 737562149.3 = 737,562,149.3 ft-lb
1 gigajoule = 737,562,149.3 foot-pounds.
Real-world example
100 GJ × 737562149.3 = 73,756,214,930 ft-lb
100 gigajoules = 73,756,214,930 foot-pounds.
Conversion table
| Gigajoule (GJ) | Foot-pound (ft-lb) |
|---|---|
| 1 GJ | 737,562,149.3 ft-lb |
| 10 GJ | 7,375,621,493 ft-lb |
| 50 GJ | 36,878,107,460 ft-lb |
| 100 GJ | 73,756,214,930 ft-lb |
| 500 GJ | 368,781,074,600 ft-lb |
| 1,000 GJ | 737,562,149,300 ft-lb |
Reverse conversion: Foot-pound to Gigajoule
1 ft-lb × 1.355818e-9 = 1.355818e-9 GJ
1 foot-pound = 1.355818e-9 gigajoules.
gigajoules = foot-pounds × 1.355818e-9
For a page dedicated to this direction, see Foot-pound to Gigajoule.
Understanding the Gigajoule (GJ)
Gigajoule is 1000000000 joule units.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many foot-pounds are in 1 gigajoule?
1 gigajoule equals 737,562,149.3 foot-pounds, using the exact defined conversion factor rather than an estimate.
How do I convert gigajoule to foot-pound?
Multiply the gigajoule value by 737562149.3. The converter above does this instantly to whatever precision you set.
How do I convert foot-pound back to gigajoule?
Use the reverse factor: 1 foot-pound equals 1.355818e-9 gigajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a gigajoule?
Gigajoule (GJ) is a unit of engineering.
What is a foot-pound?
Foot-pound (ft-lb) is a unit of engineering.
Is the gigajoule to foot-pound conversion exact?
Yes. Both gigajoule and foot-pound are defined by fixed standards rather than physical artifacts, so the factor of 737562149.3 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.