Question 1

How do I convert lb-ft to N·m?

Accepted Answer

Multiply pound-feet by 1.35582 to get newton-meters. To reverse the conversion, divide by the same factor.

Question 2

What is the difference between torque and horsepower?

Accepted Answer

Torque measures twisting force, while horsepower measures the rate of doing work. Engine performance discussions often use both because they describe different aspects of output.

Question 3

What torque unit is used for engine specs?

Accepted Answer

Engine torque is often shown in lb-ft in the US and N·m in many other markets. Service manuals may also use in-lb for smaller fasteners.

Question 4

How much torque is 400 lb-ft in newton-meters?

Accepted Answer

400 lb-ft is about 542 N·m. That is a common performance-engine reference point.

From	To
1 Pound-force·Foot	1.355818 Newton-meter
1 Newton-meter	0.7375621 Pound-force·Foot
1 Pound-force·Inch	0.1129848 Newton-meter
400 Pound-force·Foot	542.3272 Newton-meter
20 Newton-meter	177.0149 Pound-force·Inch
1 Kilogram-force·Meter	9.80665 Newton-meter
100 Newton-meter	73.75621 Pound-force·Foot
250 Pound-force·Inch	28.24621 Newton-meter

Torque

Common conversions

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