Torque unit converter
Convert torque between SI, imperial and gravitational units, with factors derived from SI definitions.
Torque · unit conversion
v0.1.0 · NIST SP 811Converted value1.3558179 N·m1 ft·lbf = 1.3558179483314003 N·m · 1 N·m = 1 N·m
value_to = value_from × factor_from ÷ factor_to · factors from SI definitions
Test vectors for this tool
The reference cases this calculator is tested against on every change. Use them to check your own software. All test vectors · Download JSON
| ID | Inputs | Expected | Tolerance | Source |
|---|---|---|---|---|
| TRQ-01 | value = 1, from = ftlb, to = Nm | 1.3558179483 N·m | ± 5e-11 | 0.453 592 37 kg × 9.806 65 m/s² × 0.3048 m (NIST SP 811) |
| TRQ-02 | value = 1, from = Nm, to = inlb | 8.850745791 in·lbf | ± 5e-10 | 1 ÷ 0.112 984 829 N·m (NIST SP 811) |
| TRQ-03 | value = 1, from = inoz, to = cNm | 0.7061551814 cN·m | ± 5e-11 | (0.453 592 37 ÷ 16) kg × 9.806 65 m/s² × 0.0254 m |
| TRQ-04 | value = 12, from = inlb, to = ftlb | 1 ft·lbf | ± 1e-12 | Definition: 12 in = 1 ft |
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