Torque Unit Converter

Torque Unit Converter is evaluated from Torque Value and From Unit. The calculation reports lb-ft, lb-in and N-m.

Results

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About the Torque Unit Converter

Torque Unit Converter is treated here as a quantitative relation between Torque Value and From Unit and lb-ft, lb-in, N-m and kg-m.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
1 lb-ft = 1.35582 N-m (exact: 0.3048 m x 4.44822 N)
1 lb-in = lb-ft / 12 = 0.112985 N-m
1 kg-m = 9.80665 N-m

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

1 lb-ft = 1.35582 N-m (exact: 0.3048 m x 4.44822 N)
1 lb-in = lb-ft / 12 = 0.112985 N-m
1 kg-m = 9.80665 N-m

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Wheel Lug Nuts: 100 lb-ft

Inputs

value: 100 from_unit: lb-ft (foot-pounds)
lb-ft: 100 lb-ft. lb-in: 1,200 lb-in. N-m: 135.582 N-m. kg-m: 13.8255 kg-m

With Torque Value = 100 and From Unit = lb-ft (foot-pounds) as the stated inputs, the result is lb-ft = 100 lb-ft, lb-in = 1,200 lb-in and N-m = 135.582 N-m. Each value corresponds to the declared output fields.

Example 2: European Car Spec: 250 N-m

Inputs

value: 250 from_unit: N-m (Newton-meters)
lb-ft: 184.39 lb-ft. lb-in: 2,212.68 lb-in. N-m: 250 N-m. kg-m: 25.4929 kg-m

With Torque Value = 250 and From Unit = N-m (Newton-meters) as the stated inputs, the result is lb-ft = 184.39 lb-ft, lb-in = 2,212.68 lb-in and N-m = 250 N-m. Each value corresponds to the declared output fields.

Example 3: Spark Plug: 20 lb-ft in inch-pounds

Inputs

value: 20 from_unit: lb-ft (foot-pounds)
lb-ft: 20 lb-ft. lb-in: 240 lb-in. N-m: 27.116 N-m. kg-m: 2.7651 kg-m

With Torque Value = 20 and From Unit = lb-ft (foot-pounds) as the stated inputs, the result is lb-ft = 20 lb-ft, lb-in = 240 lb-in and N-m = 27.116 N-m. Each value corresponds to the declared output fields.

Example 4: Ford F-150 Axle Nut: 184 lb-ft

Inputs

value: 184 from_unit: lb-ft (foot-pounds)
lb-ft: 184 lb-ft. lb-in: 2,208 lb-in. N-m: 249.471 N-m. kg-m: 25.439 kg-m

With Torque Value = 184 and From Unit = lb-ft (foot-pounds) as the stated inputs, the result is lb-ft = 184 lb-ft, lb-in = 2,208 lb-in and N-m = 249.471 N-m. Each value corresponds to the declared output fields.

Common Use Cases

  • Convert torque spec from lb-ft to N-m for metric torque wrench
  • Convert engine torque from N-m to lb-ft
  • Convert lug nut torque spec to inch-pounds