The formula

lb-ft = Nm × 0.7376 and Nm = lb-ft × 1.3558. Torque is the twisting force an engine or motor produces. It's what you feel pulling away and towing, while horsepower decides top speed and acceleration at higher revs.

Nm to lb-ft table

Nm	lb-ft	kgf·m
50 Nm	36.9 lb-ft	5.1 kgf·m
100 Nm	73.8 lb-ft	10.2 kgf·m
150 Nm	110.6 lb-ft	15.3 kgf·m
200 Nm	147.5 lb-ft	20.4 kgf·m
250 Nm	184.4 lb-ft	25.5 kgf·m
300 Nm	221.3 lb-ft	30.6 kgf·m
350 Nm	258.1 lb-ft	35.7 kgf·m
400 Nm	295 lb-ft	40.8 kgf·m
450 Nm	331.9 lb-ft	45.9 kgf·m
500 Nm	368.8 lb-ft	51 kgf·m
600 Nm	442.5 lb-ft	61.2 kgf·m
800 Nm	590 lb-ft	81.6 kgf·m
1,000 Nm	737.6 lb-ft	102 kgf·m

lb-ft to Nm table

lb-ft	Nm
50 lb-ft	68 Nm
100 lb-ft	136 Nm
150 lb-ft	203 Nm
200 lb-ft	271 Nm
250 lb-ft	339 Nm
300 lb-ft	407 Nm
350 lb-ft	475 Nm
400 lb-ft	542 Nm
500 lb-ft	678 Nm
650 lb-ft	881 Nm
750 lb-ft	1,017 Nm

Torque and horsepower

Power is torque multiplied by engine speed: hp = lb-ft × rpm ÷ 5,252, or kW = Nm × rpm ÷ 9,549. That's why torque and horsepower curves always cross at 5,252 rpm on a chart in imperial units. Use the horsepower to kW converter for the power side.

Questions

How do I convert Nm to lb-ft?

Divide newton metres by 1.3558, or multiply by 0.7376. 400 Nm is 295 lb-ft.

How do I convert lb-ft to Nm?

Multiply pound-feet by 1.3558. 300 lb-ft is 406.7 Nm.

What is kgf·m (kgm)?

Kilogram-force metres, an older metric unit still seen in Japanese and Korean brochures. 1 kgf·m = 9.80665 Nm, so 25 kgf·m is 245.2 Nm.

Is lb-ft the same as ft-lb?

Yes, for torque they are used interchangeably, though engineers prefer lb-ft (pound-feet) for torque and ft-lb for energy or work.

How is torque related to horsepower?

Power = torque × engine speed. In imperial units, hp = lb-ft × rpm ÷ 5,252; in metric, kW = Nm × rpm ÷ 9,549. That is why a diesel with lots of torque at low rpm can have less peak power than a high-revving petrol engine.