Millijoules to Foot-pounds Converter
Enter the energy in millijoules below to convert it to foot-pounds.
Convert Millijoules to Foot-pounds
Enter a value in millijoules (mJ) to convert to foot-pounds (ft·lbf).
Millijoule to Foot-pound Conversion Table
Table showing various millijoule measurements converted to foot-pounds. Click any preset value or arrow to load it into the converter.
| Millijoules (mJ) | Foot-pounds (ft·lbf) |
|---|---|
| 1 mJ | 0.000737562 ft·lbf |
| 2 mJ | 0.0014751 ft·lbf |
| 2.5 mJ | 0.0018439 ft·lbf |
| 5 mJ | 0.0036878 ft·lbf |
| 10 mJ | 0.0073756 ft·lbf |
| 15 mJ | 0.0110634 ft·lbf |
| 20 mJ | 0.0147512 ft·lbf |
| 25 mJ | 0.0184391 ft·lbf |
| 30 mJ | 0.0221269 ft·lbf |
| 50 mJ | 0.0368781 ft·lbf |
How to Convert Millijoules to Foot-pounds
To convert millijoules to foot-pounds, multiply the energy by the following conversion ratio: 0.000737562 foot-pounds/millijoule.
Since one millijoule is equal to 0.000737562 foot-pounds, you can use this simple formula to convert:
The energy in foot-pounds is equal to the energy in millijoules multiplied by 0.000737562.
For example, here's how to convert 5 millijoules to foot-pounds using the formula above.
How Many Foot-pounds Are in a Millijoule?
There are 0.000737562 foot-pounds in a millijoule, which is why we use this value in the formula above.
Our millijoule to foot-pound calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Millijoules and foot-pounds are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Millijoule?
A millijoule is a unit of energy equal to 1/1,000 of a joule (0.001 J). One-thousandth of a Joule. [1]
The millijoule is classified as a metric and SI-compatible unit of energy. Millijoules can be abbreviated as mJ; for example, 1 millijoule can be written as 1 mJ.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millijoule (mJ) a convenient decimal multiple of the joule (J).
In practice, millijoules (mJ) are widely used across fine-tolerance laboratory, analytical, and micro-scale energy measurements 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 millijoules (mJ) and foot-pounds (ft·lbf), keep full floating-point precision (1 mJ = 0.000737562 ft·lbf; 1 ft·lbf = 1,355.8179483 mJ) during intermediate calculations and round only the final foot-pound figure to match your instrument tolerance.
More Millijoule & Foot-pound Conversions
Need to calculate in the opposite direction? Use our foot-pounds to millijoules calculator to switch your starting unit immediately. You can also explore related tools such as converting foot-pounds to millijoules, converting joules to foot-pounds, or converting joules to calories.
Convert from Millijoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Millijoules (mJ) to Foot-pounds (ft·lbf)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Millijoule (mJ) & Foot-pound (ft·lbf) (ft·lbf)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (mJ to ft·lbf)