Convert Foot-pounds to Kilocalories
1 foot-pound (ft·lbf) equals 0.0003240482668 kilocalories (kcal).
1 ft·lbf = 0.0003240482668 kcal
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk foot-pound to kilocalorie converter to paste a column from Excel.
How to Convert Foot-pound to Kilocalorie
- 1 ft·lbf = 0.0003240482668 kcal
- 1 kcal = 3085.960033 ft·lbf
- Example: convert 15 ft·lbf to kcal: 15 ft·lbf = 15 × 0.0003240482668 kcal = 0.004860724002 kcal
Reference conditions. kcal: Thermochemical kilocalorie (food Calorie), 4184 J exactly.
Formula
kcal = ft·lbf × 0.0003240482668096
or kcal = ft·lbf ÷ 3085.960032576
Derivation from SI units:
- 1 ft·lbf = 0.3048 m × 4.4482216152605 N = 1.3558179483314 J
- 1 kcal = 1000 cal = 4184 J (exact)
- 1 ft·lbf = 1.355817948331 J ÷ 4184 J per kcal = 0.0003240482668096 kcal
Both units are defined exactly, so the factor is exact. Foot-pound definition: foot-pound; Kilocalorie definition: kilocalorie.
Worked examples
- A reading of 25 ft·lbf converts to 0.00810120667 kcal.
25 ft·lbf × 0.0003240482668 = 0.00810120667 kcal - A value of 250 ft·lbf is 0.0810120667 kcal.
250 ft·lbf × 0.0003240482668 = 0.0810120667 kcal
Foot-pound to Kilocalorie conversion table
| Foot-pounds (ft·lbf) | Kilocalories (kcal) |
|---|---|
| 1 ft·lbf | 0.0003240482668 kcal |
| 5 ft·lbf | 0.001620241334 kcal |
| 10 ft·lbf | 0.003240482668 kcal |
| 25 ft·lbf | 0.00810120667 kcal |
| 50 ft·lbf | 0.01620241334 kcal |
| 100 ft·lbf | 0.03240482668 kcal |
| 250 ft·lbf | 0.0810120667 kcal |
| 500 ft·lbf | 0.1620241334 kcal |
| 1000 ft·lbf | 0.3240482668 kcal |
| 2000 ft·lbf | 0.6480965336 kcal |
Where it's used
Foot-pounds are used for muzzle energy of firearms and air rifles, while kilocalories appear in food and diet energy (2000 kcal reference intake). Both measure energy, work and heat, so the conversion is a fixed factor.
Foot-pound to other energy units
| Conversion | 1 ft·lbf equals |
|---|---|
| foot-pound to joule | 1.355817948 J |
| foot-pound to kilojoule | 0.001355817948 kJ |
| foot-pound to megajoule | 0.000001355817948 MJ |
| foot-pound to calorie | 0.3240482668 cal |
| foot-pound to kilocalorie | 0.0003240482668 kcal |
| foot-pound to watt-hour | 0.0003766160968 Wh |
| foot-pound to kilowatt-hour | 3.766160968 × 10⁻⁷ kWh |
| foot-pound to BTU | 0.001285067463 BTU |
| foot-pound to therm | 1.285374295 × 10⁻⁸ thm |
| foot-pound to electronvolt | 8.462350028 × 10¹⁸ eV |
| foot-pound to erg | 13558179.48 erg |
Frequently asked questions
How many kilocalories are in 1 foot-pound?
1 ft·lbf = 0.0003240482668 kcal.
How do I convert foot-pounds to kilocalories?
Multiply the value in ft·lbf by 0.0003240482668, or divide it by 3085.960033. For example, 15 ft·lbf × 0.0003240482668 = 0.004860724002 kcal.
Is the ft·lbf to kcal conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot pound-force (ft·lbf)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilocalorie (thermochemical)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Foot-pounds to Kilocalories. Retrieved October 17, 2026, from https://scientificconverters.com/energy/foot-pounds-to-kilocalories/
IEEE
Scientific Converters, "Convert Foot-pounds to Kilocalories," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/energy/foot-pounds-to-kilocalories/