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Energy
Kilojoules to Foot-pounds
Convert kilojoules (kJ) to foot-pounds (ft·lb). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 kJ = 737.56 ft·lb
Kilojoules to Foot-pounds Conversion Table
Common values, ready to copy:
| kilojoules | foot-pounds |
|---|---|
| 1 kJ | 737.56 ft·lb |
| 2 kJ | 1475.12 ft·lb |
| 5 kJ | 3687.81 ft·lb |
| 10 kJ | 7375.61 ft·lb |
| 25 kJ | 18439.03 ft·lb |
| 50 kJ | 36878.05 ft·lb |
| 100 kJ | 73756.1 ft·lb |
| 1,000 kJ | 737561.03 ft·lb |
Formula
foot-pounds = kilojoules × 7.37561033e+2
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
About Kilojoules and Foot-pounds
Kilojoules (kJ): A thousand joules; the practical SI energy unit for food and nutrition in metric countries. Common uses: Food energy labeling outside the US, electrical energy in kJ for small batteries, and biology (metabolism).
Foot-pounds (ft·lb): The work done lifting one pound through one foot against gravity; 1 ft·lb = 1.35582 J. Common uses: Torque specifications in US automotive contexts (lug nuts, bolt torque), and some US engineering work.
How the conversion works
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
The exact relationship is foot-pounds = kilojoules × 7.37561033e+2, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between kilojoules and foot-pounds comes up wherever energy measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.