Foot-Pound to Millijoule Converter

Energy Converter

27 units available

Decimals:

From

To

1,355.817948

1 ft·lbf = 1,355.817948 mJ

Formula:

mJ = ft·lbf × 1,355.8179483

With your value: 1 ft·lbf = 1,355.8179483 mJ

How big is that?

Everyday references on a logarithmic scale, all expressed in foot-pound so you can sanity-check the result.

Heartbeat (1/1.4 your value)0.738 ft·lbf

Your value1.00 ft·lbf

AA battery charge (7.4e+3× your value)7.38e+3 ft·lbf

Slice of bread (2.1e+5× your value)2.07e+5 ft·lbf

Daily food intake (6.2e+6× your value)6.20e+6 ft·lbf

Litre of petrol (2.5e+7× your value)2.52e+7 ft·lbf

Other Foot-Pound to Millijoule conversions

2 ft·lbf to mJ 3 ft·lbf to mJ 4 ft·lbf to mJ 5 ft·lbf to mJ 6 ft·lbf to mJ 7 ft·lbf to mJ 8 ft·lbf to mJ

Foot-Pound to Millijoule Conversion Table

Foot-Pound (ft·lbf)	Millijoule (mJ)
0.5	677.908974
1	1,355.817948
2	2,711.635897
5	6,779.089742
10	13,558.179483
15	20,337.269225
20	27,116.358966
25	33,895.448707
50	67,790.897415
100	135,581.79483
250	338,954.487075
500	677,908.97415
1000	1,355,817.9483

Millijoule to Foot-Pound Conversion Table

Millijoule (mJ)	Foot-Pound (ft·lbf)
0.5	0.000369
1	0.000738
2	0.001475
5	0.003688
10	0.007376
15	0.011063
20	0.014751
25	0.018439
50	0.036878
100	0.073756
250	0.184391
500	0.368781
1000	0.737562

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Foot-Pound (ft·lbf)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Millijoule (mJ)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Foot-Pound to Millijoule

To convert from Foot-Pound (ft·lbf) to Millijoule (mJ), multiply the value by 1,355.8179483.

Formula: mJ = ft·lbf × 1,355.8179483

Reverse: ft·lbf = mJ × 0.0007375621

Step-by-Step Example

Start with your value in Foot-Pound. For example: 5 ft·lbf
Multiply by the conversion factor: 5 x 1,355.8179483
The result is: 6,779.089742 mJ

About Foot-Pound

The foot-pound (ft·lbf) is a unit of energy and work. One foot-pound equals 1.355817948 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

About Millijoule

The millijoule (mJ) is a unit of energy and work. One millijoule equals 0.001 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many Millijoule are in 1 Foot-Pound?

There are exactly 1,355.8179483 Millijoule in 1 Foot-Pound. This means the conversion factor from Foot-Pound to Millijoule is 1,355.8179483.

What is the formula to convert Foot-Pound to Millijoule?

The formula to convert Foot-Pound to Millijoule is: mJ = ft·lbf × 1,355.8179483. For example, to convert 10 Foot-Pound to Millijoule, you would multiply 10 by 1,355.8179483.

What is a Foot-Pound?