Foot-pounds to Joules Converter (ft·lbf to J)

1 ft·lbf = 1.35582 J

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Formula

To convert foot-pounds to joules, multiply the value by 1.35581795.

J = ft·lbf × 1.35581795

Example calculation

Convert 5 ft·lbf to J:

5 ft·lbf × 1.35581795 = 6.77909 J

Conversion table

foot-pounds → joules
ft·lbfJ
11.3558
22.7116
34.0675
45.4233
56.7791
68.1349
79.4907
810.8465
912.2024
1013.5582
1520.3373
2027.1164
2533.8954
3040.6745
3547.4536
4054.2327
4561.0118
5067.7909
5574.5700
6081.3491
6588.1282
7094.9073
75101.6863
80108.4654
85115.2445
90122.0236
95128.8027
100135.5818
200271.1636
500677.9090
10001355.8179
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About the units

Foot-pound (ft·lbf)
Used for torque and work in US engineering. About 1.3558179 joules.
Joule (J)
The SI unit of energy, one newton-metre, named after James Prescott Joule.

Frequently asked questions

How do I convert foot-pounds to joules?
To convert foot-pounds to joules, multiply the value by 1.35581795.
How many joules are in 1 foot-pound?
1 foot-pound equals 1.35582 J.
How many joules are in 10 foot-pounds?
10 ft·lbf equals 13.5582 J.
How do I convert joules back to foot-pounds?
Use the reverse converter: 1 joule equals 0.737562 ft·lbf.
Is this converter accurate?
Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

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