Performance & Engine

Torque

Convert torque between Nm, lb-ft, and kg-m.

How to Convert Torque

Pound-feet (lb-ft)

Newton-meters (Nm)

Nm = lb-ft × 1.3558

lb-ft = Nm ÷ 1.3558

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About this tool

The BuildLockr torque converter translates rotational force specs across regional standards. Use this tool to instantly convert engine output and component torque specs between Pound-feet (lb-ft) and Newton-meters (Nm). Whether you are setting up engine head bolt torque sequences or comparing engine dyno sheets, this torque calculator ensures proper torque conversions. This helps builders prevent cross-threading, over-tightening, or misinterpreting manufacturer specifications.

Torque Reference

Common Torque Output Examples

• 100 lb-ft = 135.6 Nm (typical small car engine)
• 200 lb-ft = 271.2 Nm (typical midsize sedan)
• 300 lb-ft = 406.7 Nm (typical V6 engine)
• 400 lb-ft = 542.3 Nm (typical V8 engine)
• 500 lb-ft = 677.9 Nm (high-performance engine)
• 700 lb-ft = 948.8 Nm (heavy-duty truck/supercar)
• 1000+ lb-ft = 1355+ Nm (electric vehicles/hypercars)

Understanding Torque

Torque is a measure of rotational force that an engine can produce. It represents the twisting force that drives a vehicle forward and is particularly important for acceleration, towing, and climbing. Different regions use different units to measure torque, with pound-feet (lb-ft) common in the US and Newton-meters (Nm) used in most other countries.

Benefits

• Determines acceleration capability, especially from low RPM
• Critical for towing and heavy-load applications
• Provides better "seat-of-pants" feel during acceleration
• Important for off-road and climbing performance
• Key factor in drivetrain component selection

Important Considerations

• Peak torque typically available at lower RPMs than peak horsepower
• Diesel engines generally produce more torque than gasoline engines
• Turbocharged and supercharged engines can produce significantly more torque
• Torque at low RPMs is important for everyday drivability
• Electric motors produce maximum torque from 0 RPM

Common Torque Questions

How do you convert lb-ft to Nm?

To convert torque from pound-feet (lb-ft) to Newton-meters (Nm), multiply the value by 1.35582. To convert from Nm to lb-ft, divide the value by 1.35582 (or multiply by 0.73756).

What is the difference between torque and horsepower?

Torque is the rotational force or twisting force an engine produces, representing the capacity to do work. Horsepower is the rate at which the engine can do work (power). Horsepower is calculated using the formula: HP = (Torque × RPM) / 5252.

Why do electric vehicles produce instant torque?

Unlike internal combustion engines that must build RPMs to reach their powerband, electric motors use magnetic attraction and repulsion to deliver peak torque immediately from 0 RPM, resulting in extremely fast off-the-line acceleration.