Convert Foot-Pound-Force to Calories
Convert Foot-Pound-Force (ft·lbf) to Calories (cal) instantly and accurately.
Conversion Formula
cal = ft·lbf × 0.3240482668
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 Calories
A calorie (cal) - the thermochemical calorie - is exactly 4.184 J, defined as the heat to raise 1 g of water by 1°C. Standard since 1954. The calorie is the fundamental unit of heat measurement in thermochemistry: glucose combustion releases 669.9 kcal/mol; water vaporisation requires 539.7 cal/g. Bond dissociation energies in quantum chemistry are often quoted in kcal/mol. Note: the dietary Calorie (capital C) on food labels is 1 kcal = 4,184 J - a factor-of-1,000 difference that causes persistent confusion. 1 cal = 4.184 J = 1.163 × 10⁻³ Wh.
Quick Reference Table
| Foot-Pound-Force (ft·lbf) | Calories (cal) |
|---|---|
| 1 ft·lbf | 0.324048 cal |
| 2 ft·lbf | 0.648097 cal |
| 5 ft·lbf | 1.62024 cal |
| 10 ft·lbf | 3.24048 cal |
| 25 ft·lbf | 8.10121 cal |
| 50 ft·lbf | 16.2024 cal |
| 100 ft·lbf | 32.4048 cal |