Work from one pound-force over one foot.
Foot-pounds to Kilocalories Converter — ft-lb to kcal
Convert Foot-pound (ft-lb) to Kilocalorie (kcal) using the exact conversion factor (1 foot-pound = 0.0003240483 kilocalorie). See the formula, worked examples, and conversion table.
Foot-pounds to Kilocalories converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
A kilocalorie is 1,000 calories.
Result = input x 1.355817948 / 4184.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Kilocalories
Foot-pound and Kilocalorie both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Work from one pound-force over one foot, and a kilocalorie is 1,000 calories.
Formula
kilocalories = foot-pounds × 0.00032404826681
This factor comes from each unit's defined relationship to the category's base unit: 1 foot-pound equals 1.35581794833 base units, and 1 kilocalorie equals 4184 base units, so dividing one by the other gives the direct foot-pound-to-kilocalorie factor of 0.00032404826681.
Simple example
1 ft-lb × 0.0003240482668 = 0.0003240483 kcal
1 foot-pound = 0.0003240483 kilocalories.
Real-world example
100 ft-lb × 0.0003240482668 = 0.0324048267 kcal
100 foot-pounds = 0.0324048267 kilocalories.
Conversion table
| Foot-pound (ft-lb) | Kilocalorie (kcal) |
|---|---|
| 1 ft-lb | 0.0003240483 kcal |
| 10 ft-lb | 0.0032404827 kcal |
| 50 ft-lb | 0.0162024133 kcal |
| 100 ft-lb | 0.0324048267 kcal |
| 500 ft-lb | 0.1620241334 kcal |
| 1,000 ft-lb | 0.3240482668 kcal |
Reverse conversion: Kilocalorie to Foot-pound
0.0003240483 kcal × 3085.960033 = 1.000000102 ft-lb
0.0003240483 kilocalories = 1.000000102 foot-pounds.
foot-pounds = kilocalories × 3085.96003258
For a page dedicated to this direction, see Kilocalorie to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Kilocalorie (kcal)
A kilocalorie is 1,000 calories.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilocalories are in 1 foot-pound?
1 foot-pound equals 0.0003240483 kilocalories, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to kilocalorie?
Multiply the foot-pound value by 0.0003240482668. The converter above does this instantly to whatever precision you set.
How do I convert kilocalorie back to foot-pound?
Use the reverse factor: 1 kilocalorie equals 3,085.960033 foot-pounds. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot-pound?
Foot-pound (ft-lb) is a unit of engineering.
What is a kilocalorie?
Kilocalorie (kcal) is a unit of engineering.
Is the foot-pound to kilocalorie conversion exact?
Yes. Both foot-pound and kilocalorie are defined by fixed standards rather than physical artifacts, so the factor of 0.0003240482668 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.