Foot Pounds to Kilocalories
Type a value in either box to convert between foot pounds and kilocalories. The factor is 0.000324048.
| Foot Pounds | Kilocalories |
|---|---|
| 1 ft·lb | 0.000324 kcal |
| 2 ft·lb | 0.000648 kcal |
| 3 ft·lb | 0.000972 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 |
How to use
- Enter a value in the Foot Pounds field.
- The Kilocalories figure appears immediately — no button to press.
- Typing in the Kilocalories field converts back to Foot Pounds the same way.
- Use the reference table for the values that come up most often.
Foot Pounds to Kilocalories formula
The factor from foot pounds to kilocalories is 0.000324048267.
kcal = ft·lb × 0.000324048267
Why this factor: the foot-pound and the kilocalorie are both defined against the joule, so dividing one definition by the other gives 0.000324048267 directly. Both definitions are set out in full below.
To go the other way, divide by 0.000324048267 — or use the Kilocalories to Foot Pounds converter, which is the same calculation reversed.
Worked example
Start with 2000 ft·lb. Multiply by 0.000324048267 to get 0.648097 kcal.
2000 ft·lb × 0.000324048267 = 0.648097 kcal
The converter above does this for any value you type, in either direction.
What is a foot-pound?
A foot-pound is the work done by one pound-force acting through one foot.
Definition: About 1.3558179 joules.
Where it is used: US mechanical work and torque figures, fastener specifications, and firearm muzzle energy.
Worth knowing: As a torque unit it is properly 'pound-foot' (lbf·ft); as an energy unit it is 'foot-pound'. The numbers coincide but the quantities differ.
What is a kilocalorie?
A kilocalorie is 1,000 calories, and is what food labeling calls a 'Calorie'.
Definition: Exactly 4,184 joules.
Where it is used: Nutrition and dietary energy in the US and much of the world, and metabolic measurements.
Worth knowing: Written with a capital C ('Calorie') or as 'kcal' on labels. This is the unit meant by everyday talk about counting calories.
Foot Pounds vs Kilocalories
The foot-pound is a US customary unit while the kilocalorie is a specialized unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many kilocalories are in a foot-pound?
One foot-pound equals 0.000324048267 kilocalories.
What is the formula to convert foot pounds to kilocalories?
Multiply the number of foot pounds by 0.000324048267. To reverse it, divide by 0.000324048267 instead.
How do I convert kilocalories back to foot pounds?
Divide by 0.000324048267, which is the same as multiplying by 3085.96003.
How many kilocalories are in 10 foot pounds?
10 ft·lb works out to 0.00324 kcal.
Is there anything to watch out for with foot pounds?
As a torque unit it is properly 'pound-foot' (lbf·ft); as an energy unit it is 'foot-pound'. The numbers coincide but the quantities differ.
How is the foot-pound defined?
About 1.3558179 joules.