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Energy
Foot-pounds to Kilocalories
Convert foot-pounds (ft·lb) to kilocalories (kcal). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 ft·lb = 0.000324 kcal
Foot-pounds to Kilocalories Conversion Table
Common values, ready to copy:
| foot-pounds | kilocalories |
|---|---|
| 1 ft·lb | 0.000324 kcal |
| 2 ft·lb | 0.000648 kcal |
| 5 ft·lb | 0.00162 kcal |
| 10 ft·lb | 0.00324 kcal |
| 25 ft·lb | 0.008101 kcal |
| 50 ft·lb | 0.016202 kcal |
| 100 ft·lb | 0.032405 kcal |
| 1,000 ft·lb | 0.324049 kcal |
Formula
kilocalories = foot-pounds × 3.24048757e-4
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 Foot-pounds and Kilocalories
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.
Kilocalories (kcal): A thousand small calories, or about 4,184 J; this is what 'calories' means on US food labels. Common uses: Food energy labeling in the US (a 'Calorie' on a US food label is a kilocalorie), nutrition tracking, and exercise energy expenditure.
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 kilocalories = foot-pounds × 3.24048757e-4, 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 foot-pounds and kilocalories 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.