Torque is a measure of rotational or twisting force — how hard something is being turned around an axis or pivot, equal to the force applied multiplied by the distance from that pivot (the lever arm).

How do I convert lb-ft to Nm?

Multiply the lb-ft value by about 1.3558 to get Nm. For example, 35 lb-ft is about 47.45 Nm.

How do I convert Nm to lb-ft?

Divide the Nm value by about 1.3558 (or multiply by about 0.7376) to get lb-ft.

What's the difference between torque and horsepower?

Torque is the twisting force itself, while horsepower measures the rate of doing work. Power equals torque multiplied by rotational speed, so the same torque produces more horsepower at higher RPM.

Why is the unit for torque the same as the unit for energy?

Because both are defined as force multiplied by distance — a newton-meter of torque and a joule of energy are dimensionally identical. They're still kept as separate concepts: energy is a scalar amount of work done, while torque is a rotational force that doesn't by itself do any work.

How do I calculate the force needed with a torque wrench?

Divide the target torque by the length of your wrench, measured from the pivot to where you apply force: Force = Torque ÷ Length. The "Force from Torque" calculator on this page does this automatically.

How does a torque wrench extension affect the setting?

Adding an extension changes the effective lever arm, so the wrench's own dial needs to be set lower than the target torque at the fastener: Setting = Target × (Wrench length ÷ (Wrench length + Extension length)). The calculator on this page works this out automatically.

What is a typical lug nut torque spec?

Typical passenger vehicle lug nut torque specs range from about 80 to 140 Nm (roughly 60 to 100 lb-ft), but this varies by manufacturer — always check your specific vehicle's specification.

How many lb-in are in one lb-ft?

There are 12 lb-in in 1 lb-ft, the same relationship as 12 inches in a foot.

Is kgf-m the same as Nm?

No. Kilogram-force meter (kgf·m) is based on kilogram-force, which depends on standard gravity (9.80665 m/s²), so 1 kgf·m is about 9.80665 Nm, not exactly 1.

How do you calculate power from torque and RPM?

Multiply torque by angular velocity: Power (W) = Torque (Nm) × (2π × RPM ÷ 60). The "Power from Torque & RPM" calculator on this page converts the result into watts, kilowatts and horsepower automatically.

Is this torque converter free to use?

Yes, it is completely free, requires no registration, and runs entirely in your browser with no usage limits.

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Torque Conversions

8 units · 4 calculators

Torque Converter & Calculator

Convert newton-meters, pound-feet, pound-inches, kilogram-force meters and more, then work out torque from force and lever arm, power from torque and RPM, wrench force, or a torque wrench extension setting — all calculated instantly in your browser.

8Torque units

4Calculators

0msServer round-trips

Result / torque-field unit

150N·m

T = F × r = 500 × 0.3 = 150 N·m

From

lb·ft

To

N·m

47.4536N·m

N·m = lb·ft × 1.355818

Runs locally, no data sent Standard NIST/BIPM factors Free, no sign-up

How each calculation works

The formula behind each calculator above, with a short note on when you'd use it.

Quick conversion table

Common values for your selected units in the converter above, updated automatically.

lb·ft	N·m

Torque unit reference

What each unit means, where it's used, and how it relates to the newton-meter.

More converters from ConvertGPT

Torque is built from force and distance, and shares its unit with energy — these are the ones people pair with it most often.

Frequently asked questions

Straight answers to the questions people ask most about torque units and calculations.

All calculations and conversions run locally in your browser using standard NIST/BIPM conversion factors. No data is sent anywhere.

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