Nm to in-lbs Converter

Convert torque between newton-meters and inch-pounds in both directions.

Supports 18 torque units with bidirectional conversion and selectable display units.

Updated August 8, 2026

CreatorFrank Zhao

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Introduction / overview

Nm to in-lbs Converter turns a single torque value into its equivalent across the units you actually see on torque wrenches, service manuals, and spec sheets — newton-meters and inch-pounds up front, plus foot-pounds, kilogram-force meters, and more under “More conversion options”.

Type a torque in any field and every other unit recalculates instantly. You can start from Nm and read in-lbs, or start from in-lbs and read Nm — the conversion works in both directions.

This is the tool for the common mismatch where a component's spec is written in newton-meters but the torque wrench in front of you is marked in inch-pounds (or the other way around). The extra field covers less frequent torque units, including $\mathrm{lbf\cdot ft}$ (foot-pounds), $\mathrm{kgf\cdot m}$ , and $\mathrm{J/rad}$ .

How to use / quick start

1Enter the torque in the field whose unit you already have — Newton-meters (Nm) or Inch-pounds (in-lbs).
2Read the equivalent value in the other field. Because the conversion is two-way, you can also type in in-lbs first and read Nm.
3Need a unit that isn't shown up front? Open More conversion options, pick a unit such as $\mathrm{lbf\cdot ft}$ or $\mathrm{kgf\cdot m}$ , and enter the value there.

Example: converting 10 N·m to inch-pounds

Type $10$ in the Newton-meters field. The calculator multiplies by the exact inch-pounds-per-newton-meter factor:

10\ \mathrm{N\cdot m}

\times

8.8507457913\ \frac{\mathrm{lbf\cdot in}}{\mathrm{N\cdot m}}

=

88.5075\ \mathrm{lbf\cdot in}

The same torque is shown at the same time as $88.5075\ \mathrm{in\text{-}lbs}$ , and as $7.37562\ \mathrm{lbf\cdot ft}$ if you switch the extra field, so you can read the exact value you need without re-entering anything.

Calculation method

Internally, every torque is carried in newton-meters, the SI unit for torque. The newton-meter is a derived SI unit combining the metre, kilogram, and second. If $T_s$ is the value you entered and $f_s$ is the number of newton-meters in one source unit, the shared torque is:

T_{\mathrm{N\cdot m}} = T_s \times f_s

T_t

=

T_{\mathrm{N\cdot m}} \div f_t

=

T_s \times f_s \div f_t

How to read the method:

$T_{\mathrm{N\cdot m}}$ is the shared torque expressed in newton-meters.
$f_s$ and $f_t$ are the exact newton-meters-per-unit factors, such as $0.1129848290276167\ \mathrm{N\cdot m / lbf\cdot in}$ or $1.3558179483314004\ \mathrm{N\cdot m / lbf\cdot ft}$ .
Because every editable field is a starting point, the same relationship works from in-lbs or any “other” unit back to Nm, not only from Nm outward.

Frequently asked questions

Why isn't 10 N·m exactly 88.5 in-lbs?

The familiar rule of thumb uses a rounded factor of $8.85$ . The exact value this calculator uses is $8.8507457913\ \mathrm{lbf\cdot in / N\cdot m}$ , so $10\ \mathrm{N\cdot m}$ is really $88.5075\ \mathrm{lbf\cdot in}$ . The difference is negligible for small torques, but it grows with the value, and for precision work the exact factor matters.

Can I convert foot-pounds with this calculator?

Yes. Open More conversion options and choose $\mathrm{lbf\cdot ft}$ (or its alias $\mathrm{ft\text{-}lbs}$ ). Entering a value there updates the newton-meter and inch-pound fields at the same time.

Limitations

•Torque has a direction, so negative values are meaningful (for example, counterclockwise vs. clockwise). This converter keeps the sign visible instead of treating negatives as errors.
•Gravity-based units such as $\mathrm{kgf\cdot m}$ and $\mathrm{lbf\cdot ft}$ are tied to the standard reference gravity of $9.80665\ \mathrm{m/s^2}$ and the international pound. They are exact to the precision shown, but they describe those reference definitions, not a local measurement.
•This tool converts torque units only. It does not estimate bolt clamp force, fastener strength, or whether a torque value is safe for a given part — those depend on material, thread, and application factors outside a unit converter.