Torque Conversion Calculator

Enter Calculation

Value

From unit Newton-meter (Nm) Pound-foot (lb-ft) Pound-inch (lb-in) Kilogram-force meter (kgf-m)

To unit Newton-meter (Nm) Pound-foot (lb-ft) Pound-inch (lb-in) Kilogram-force meter (kgf-m)

Results

Converted Torque

73.7562

in target unit

Equivalent in Newton-meters	100 Nm

What is the Torque Conversion Calculator?

Torque is a measure of rotational force — how strongly something twists around an axis. Different industries and regions use different units: the SI standard is the Newton-meter (Nm), while imperial engineering and automotive specs often use pound-foot (lb-ft) or pound-inch (lb-in). The kilogram-force meter (kgf-m) appears in older metric and some Japanese specifications. This calculator converts a torque value between all four units instantly.

Torque is the rotational effect of a force applied at a distance from a pivot.

How to use it

Enter the torque value, choose the unit you are converting from, and select the unit you want to convert to. The result shows the equivalent torque in your target unit, plus the value expressed in Newton-meters for reference.

The formula explained

Every conversion goes through a common base unit, the Newton-meter. Each unit has a factor equal to how many Newton-meters it represents: \(1\ \text{lb-ft} = 1.355818\ \text{Nm}\), \(1\ \text{lb-in} = 0.112985\ \text{Nm}\), and \(1\ \text{kgf-m} = 9.80665\ \text{Nm}\). First the input is multiplied by its from-factor to get Newton-meters, then divided by the to-factor to express it in the target unit:

$$\text{Result} = \text{Value} \times \frac{f_{\text{from}}}{f_{\text{to}}}$$

Each unit is converted to a common base using its factor, then to the target unit.

Worked example

Convert 100 lb-ft to Nm. Multiply

$$100 \times 1.355818 = 135.5818$$

and since the target is already Nm (factor 1) the result is 135.58 Nm. To go the other way, divide a Nm value by \(1.355818\) to get lb-ft.

FAQ

Is lb-ft the same as ft-lb? Yes — pound-foot and foot-pound describe the same torque unit; the order of words doesn't change the value.

How many lb-in are in 1 lb-ft? Exactly 12, since there are 12 inches in a foot.

Why use Newton-meters as the base? The Newton-meter is the SI unit of torque, making it the natural pivot for converting between any other units accurately.