Foot pounds to Gigajoules converter
Convert foot pounds (ft·lbf) to Gigajoules (GJ). Calculate a value, check the formula and compare common measurements.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Value | Enter value using the definition in the method and example. |
| From | Select the unit or currency in which the entered number is currently expressed. |
| To | Select the unit or currency you need for the answer. |
Understanding your result
The converted value describes the same energy quantity in the selected target unit. Display rounding does not add precision to the original measurement.
Common mistakes
- Confusing the source and target units, or overlooking a prefix or case-sensitive symbol.
Check your calculation
- Convert to the target unit and then reverse the direction. Within display rounding, you should recover the original value.
Read the energy measurement guide · Calculation checks, sources and review limits
How do I convert foot pounds to gigajoules?
Enter the value in foot pounds to find the same energy quantity in gigajoules. The number changes to match the unit; the underlying quantity stays the same. Check the definitions below when a unit has more than one convention.
Common uses
- Compare energy amounts stated in different units.
- Translate energy measurements on a specification or meter.
How it works
For the displayed direction, 1 ft·lbf equals 1.35581794833e-9 GJ. The engine converts through the shared energy base quantity. Calories are thermochemical. BTU uses the international-table definition. Foot-pounds mean foot-pounds force. The multiplier is derived from the two centralized unit factors. Keep full precision until the final result; displayed answers use up to 12 significant digits. SI prefixes specify powers of ten: femto 10^-15, pico 10^-12, nano 10^-9, micro 10^-6, milli 10^-3, kilo 10^3, mega 10^6, giga 10^9 and tera 10^12. Unit symbols are case-sensitive. The numerical conversion uses the ratio of the source and target scale factors.
Worked example
10 ft·lbf converts to 1.35581794833e-8 GJ. For the reverse direction, swap the units and enter 1.35581794833e-8 GJ; the result is approximately 10 ft·lbf.
FAQ
How do I convert ft·lbf to GJ?
GJ = ft·lbf × 1.35581794833e-9
Which definition is used?
Calories are thermochemical. BTU uses the international-table definition. Foot-pounds mean foot-pounds force.
Common values
Use “Swap units” above for the reverse conversion. Values below are rounded to six significant digits.
| foot pounds | Gigajoules |
|---|---|
| 1 | 1.35582e-9 |
| 5 | 6.77909e-9 |
| 10 | 1.35582e-8 |
| 20 | 2.71164e-8 |
| 30 | 4.06745e-8 |
| 50 | 6.77909e-8 |
| 100 | 1.35582e-7 |