Convert Foot Pounds (ft·lb) to Joules (J)

1 foot pound equals 1.35582 Joules.

Formula: J = ft·lb × 1.35582

Foot Pound to Joule Converter

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How to Convert Foot Pound to Joule

1 foot pound = 1.35582 Joules

Joule = Foot Pound × 1.35582

Example: 1 ft·lb × 1.35582 = 1.35582 J

Reverse Conversion

To convert Joules back to foot pounds:

  • Remember, 1 joule equals 0.737562 foot pounds.
  • To convert 1.35582 J to ft·lb, multiply 1.35582 x 0.737562, resulting in 1 ft·lb.

Common Foot Pound to Joule Conversions

Foot Pound to Joule (Part 1)
Foot Pound Joule Actions
1 foot pound 1.35582 Joules
5 foot pounds 6.77909 Joules
10 foot pounds 13.5582 Joules
25 foot pounds 33.8954 Joules
Foot Pound to Joule (Part 2)
Foot Pound Joule Actions
50 foot pounds 67.7909 Joules
100 foot pounds 135.582 Joules
500 foot pounds 677.909 Joules
1000 foot pounds 1355.82 Joules

Foot pounds to Joules Conversion Table

Reference table with common foot pounds to joules conversions. All values calculated with high precision.

Foot Pounds to Joules Table
0.0001 to 12

Foot pounds Joules Actions
0.0001 ft·lb 0.000135582 J
0.00025 ft·lb 0.000338954 J
0.0005 ft·lb 0.000677909 J
0.001 ft·lb 0.00135582 J
0.0025 ft·lb 0.00338954 J
0.005 ft·lb 0.00677909 J
0.01 ft·lb 0.0135582 J
0.025 ft·lb 0.0338954 J
0.05 ft·lb 0.0677909 J
0.1 ft·lb 0.135582 J
14 ft·lb 0.338954 J
12 ft·lb 0.677909 J

Foot Pounds to Joules Table
1 to 100000

Foot pounds Joules Actions
1 ft·lb 1.35582 J
2 12 ft·lb 3.38954 J
5 ft·lb 6.77909 J
10 ft·lb 13.5582 J
25 ft·lb 33.8954 J
50 ft·lb 67.7909 J
100 ft·lb 135.582 J
250 ft·lb 338.954 J
500 ft·lb 677.909 J
1000 ft·lb 1355.82 J
2500 ft·lb 3389.54 J
5000 ft·lb 6779.09 J
10000 ft·lb 13558.2 J
25000 ft·lb 33895.4 J
50000 ft·lb 67790.9 J
100000 ft·lb 135582 J

Joules to Foot Pounds Table
0.001 to 5

Joules Foot pounds Actions
0.001 J 0.000737562 ft·lb
0.0025 J 0.00184391 ft·lb
0.005 J 0.00368781 ft·lb
0.01 J 0.00737562 ft·lb
0.025 J 0.0184391 ft·lb
0.05 J 0.0368781 ft·lb
0.1 J 0.0737562 ft·lb
14 J 0.184391 ft·lb
12 J 0.368781 ft·lb
1 J 0.737562 ft·lb
2 12 J 1.84391 ft·lb
5 J 3.68781 ft·lb

Joules to Foot Pounds Table
10 to 1000000

Joules Foot pounds Actions
10 J 7.37562 ft·lb
25 J 18.4391 ft·lb
50 J 36.8781 ft·lb
100 J 73.7562 ft·lb
250 J 184.391 ft·lb
500 J 368.781 ft·lb
1000 J 737.562 ft·lb
2500 J 1843.91 ft·lb
5000 J 3687.81 ft·lb
10000 J 7375.62 ft·lb
25000 J 18439.1 ft·lb
50000 J 36878.1 ft·lb
100000 J 73756.2 ft·lb
250000 J 184391 ft·lb
500000 J 368781 ft·lb
1000000 J 737562 ft·lb

Definition of Joule

Definition
SI unit of energy: 1 J = 1 N·m = 1 kg·m²·s⁻².
Notes
Used universally in physics, chemistry, and engineering.
Sources
BIPM — SI Brochure

About the Joule

Facts & Uses

  • SI unit of energy: 1 J = 1 N·m = 1 W·s = 1 C·V = 1 Pa·m³; ubiquitous in mechanics, thermodynamics, electromagnetism, and chemistry.
  • Common engineering scales: kJ, MJ, GJ for fuels, heating/cooling loads, and process energy.
  • Everyday intuition: lifting ~1 N through 1 m ≈ 1 J; a 10 Wh battery stores ≈ 36,000 J for devices/IoT.
  • Key links: 1 kWh = 3.6 × 10⁶ J; 1 eV = 1.602176634×10⁻¹⁹ J (exact) via the fixed elementary charge.

Curiosities

  • Joule heating (I²R) connects electrical losses to thermal energy in conductors and electronics.
  • Although both use N·m, torque (vector, moment) and energy (scalar, work) are physically distinct.
  • Compression/expansion work in gases is often expressed as Pa·m³ (= J), linking pressure–volume integrals to energy.
  • Named for James P. Joule, who quantified the mechanical equivalent of heat, bridging thermal and mechanical domains.

Sources

Frequently Asked Questions

How many Joules are in one foot pound?

One foot pound equals 1.35582 Joules. To convert, multiply the foot pound value by 1.35582. For the reverse, divide the joule value by 1.35582 (or multiply by 0.737562).

What is 10 foot pounds in Joules?

10 foot pounds = 13.558 Joules. This is one of the most commonly searched conversions for this pair.

How precise is the foot pound-to-joule conversion?

The factor 1.35582 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.

Looking for the reverse? Convert Joule to Foot Pound

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Conversion factors verified against NIST, BIPM, ISO 80000-4 1 cal_IT = 4.1868 J by definition (BIPM/ITS-90). Last reviewed: April 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.