Convert Foot-Pound-Force to Kilocalories
Convert Foot-Pound-Force (ft·lbf) to Kilocalories (kcal) instantly and accurately.
Conversion Formula
kcal = ft·lbf × 0.0003240482668
About Foot-Pound-Force
A foot-pound-force (ft·lbf) is the work done by one pound-force through one foot - exactly 1.3558179483314004 J. It is the standard torque and energy unit in US engineering. Automotive engine torque: Honda Civic ~125 lb-ft; Ford F-150 EcoBoost ~500 lb-ft. Muzzle energies: .22 LR ~140 ft·lbf; .308 Winchester ~2,600 ft·lbf; .50 BMG ~14,000 ft·lbf. Diesel pile hammers deliver 15,000-600,000 ft·lbf/blow. SAE Grade 8 bolts are specified at 7-950 ft·lbf. 1 ft·lbf = 12 in·lbf = 1.35582 J = 0.32405 cal.
About Kilocalories
A kilocalorie (kcal) - the food Calorie (capital C) on US and Canadian nutrition labels - is exactly 4,184 J. WHO recommends ~2,000-2,500 kcal/day for adults. Energy density of nutrients: fat 9 kcal/g, carbohydrate 4 kcal/g, protein 4 kcal/g, ethanol 7 kcal/g. Running at 10 km/h burns ~600-800 kcal/h. Standard free energy of ATP hydrolysis is approximately −7.3 kcal/mol (−30.5 kJ/mol). Pre-SI thermodynamic tables in the US and Japan use kcal/mol for reaction enthalpies. 1 kcal = 4,184 J = 4.184 kJ = 3.968 BTU = 1.163 Wh.
Quick Reference Table
| Foot-Pound-Force (ft·lbf) | Kilocalories (kcal) |
|---|---|
| 1 ft·lbf | 0.000324048 kcal |
| 2 ft·lbf | 0.000648097 kcal |
| 5 ft·lbf | 0.00162024 kcal |
| 10 ft·lbf | 0.00324048 kcal |
| 25 ft·lbf | 0.00810121 kcal |
| 50 ft·lbf | 0.0162024 kcal |
| 100 ft·lbf | 0.0324048 kcal |