What is torque and how is it measured?

Torque is the rotational equivalent of force - it measures the twisting force that causes rotation. SI unit: Newton-meters (N*m). US: pound-feet (lb-ft) or pound-inches (lb-in). Formula: torque = force x distance from pivot. Example: pushing a 10N force at 0.5m from a bolt = 5 N*m.

How do I convert lb-ft to N-m?

Multiply pound-feet by 1.35582 to get Newton-meters. Examples: 100 lb-ft = 135.58 N*m, 200 lb-ft = 271.16 N*m, 400 lb-ft = 542.32 N*m. Reverse: N*m x 0.7376 = lb-ft.

What is typical engine torque for different vehicles?

Engine torque ranges: Economy cars = 100-200 N*m (74-148 lb-ft), Sedans = 200-350 N*m, Sports cars = 350-600 N*m, Trucks = 400-700 N*m, Electric vehicles: Tesla Model S Plaid = 1,420 N*m (1,047 lb-ft) at the wheels, Semi trucks = 1,000-2,000 N*m.

What is the difference between torque and horsepower?

Torque measures rotational force (lb-ft or N*m). Horsepower measures the rate of doing work (power). They are related: HP = (torque lb-ft x RPM) / 5,252. At 5,252 RPM, torque in lb-ft equals horsepower. Diesel engines make high torque at low RPM; gasoline sports engines make high HP at high RPM.

Torque Converter

Convert between N·m, lbf·ft, kgf·m, ozf·in and more torque units.

About Torque Units

Torque is a rotational force, the product of force and the perpendicular distance from the axis. The SI unit is the Newton-meter (N·m). In automotive engineering, pound-force foot (lbf·ft) is common in the US. Kilogram-force meter (kgf·m) is used in older engineering texts.

Quick Reference Table

Unit	In N·m
1 lbf·ft	1.35582 N·m
1 lbf·in	0.11298 N·m
1 kgf·m	9.80665 N·m
1 kgf·cm	0.09807 N·m
1 ozf·in	0.00706 N·m

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