Kilojoules to Foot-pounds Converter
Enter the energy in kilojoules below to convert it to foot-pounds.
Convert Kilojoules to Foot-pounds
Enter a value in kilojoules (kJ) to convert to foot-pounds (ft·lbf).
Kilojoule to Foot-pound Conversion Table
Table showing various kilojoule measurements converted to foot-pounds. Click any preset value or arrow to load it into the converter.
| Kilojoules (kJ) | Foot-pounds (ft·lbf) |
|---|---|
| 1 kJ | 737.5621493 ft·lbf |
| 2 kJ | 1,475.1242986 ft·lbf |
| 2.5 kJ | 1,843.9053732 ft·lbf |
| 5 kJ | 3,687.8107464 ft·lbf |
| 10 kJ | 7,375.6214928 ft·lbf |
| 15 kJ | 11,063.4322392 ft·lbf |
| 20 kJ | 14,751.2429855 ft·lbf |
| 25 kJ | 18,439.0537319 ft·lbf |
| 30 kJ | 22,126.8644783 ft·lbf |
| 50 kJ | 36,878.1074639 ft·lbf |
How to Convert Kilojoules to Foot-pounds
To convert kilojoules to foot-pounds, multiply the energy by the following conversion ratio: 737.5621493 foot-pounds/kilojoule.
Since one kilojoule is equal to 737.5621493 foot-pounds, you can use this simple formula to convert:
The energy in foot-pounds is equal to the energy in kilojoules multiplied by 737.5621493.
For example, here's how to convert 5 kilojoules to foot-pounds using the formula above.
How Many Foot-pounds Are in a Kilojoule?
There are 737.5621493 foot-pounds in a kilojoule, which is why we use this value in the formula above.
Our kilojoule to foot-pound calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Kilojoules and foot-pounds are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Kilojoule?
A kilojoule is a unit of energy equal to 1,000 joules (J), the base unit for energy. Equal to 1,000 Joules. [1]
The kilojoule is classified as a metric and SI-compatible unit of energy. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilojoule (kJ) a convenient decimal multiple of the joule (J).
In practice, kilojoules (kJ) are widely used across large-scale industrial, bulk, and macro-level energy specifications within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Foot-pound?
A foot-pound is a unit of energy equal to 1.3558179 joules (J), the base unit for energy. Mechanical work unit equal to 1.355818 Joules. [2]
The foot-pound is classified as a US customary and imperial unit of energy. Foot-pounds can be abbreviated as ft·lbf; for example, 1 foot-pound can be written as 1 ft·lbf.
When working with foot-pounds (ft·lbf) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, foot-pounds (ft·lbf) are widely used across standard energy applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting energy between kilojoules (kJ) and foot-pounds (ft·lbf), keep full floating-point precision (1 kJ = 737.5621493 ft·lbf; 1 ft·lbf = 0.0013558 kJ) during intermediate calculations and round only the final foot-pound figure to match your instrument tolerance.
More Kilojoule & Foot-pound Conversions
Need to calculate in the opposite direction? Use our foot-pounds to kilojoules calculator to switch your starting unit immediately. You can also explore related tools such as converting foot-pounds to kilojoules, converting joules to foot-pounds, or converting kilojoules to joules.
Convert from Kilojoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Kilojoules (kJ) to Foot-pounds (ft·lbf)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Kilojoule (kJ) & Foot-pound (ft·lbf) (ft·lbf)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (kJ to ft·lbf)