Convert torque and RPM to shaft power in kW or HP, or calculate missing torque in Nm or lb-ft or RPM from any two entered shaft values.

Nm to kW Converter

Switch to kW to Nm

Enter any 2 values to calculate the missing one

Nm to kW Formula

Use the relationship between torque, speed, and power to convert Newton-meters to kilowatts.

P = (T ร— 2 ฯ€ ร— RPM) / (60 ร— 1000) (kW)

Variables:

  • P is power in kilowatts (kW)
  • T is torque in Newton-meters (Nm)
  • RPM is rotational speed in revolutions per minute

Tip: A handy shortcut is kW โ‰ˆ T ร— RPM / 9550 (because 9550 โ‰ˆ 60ร—1000 / 2ฯ€).

Newton-meters to kilowatts (at 1500 RPM)
Torque (Nm) Power (kW)
50.785
101.571
152.356
203.142
304.713
406.284
507.854
7511.781
10015.707
12519.634
15023.561
20031.415
25039.268
30047.122
* Rounded to 3 decimals. Uses kW = Nm ร— RPM รท 9550. Assumed RPM: 1500. At 1500 RPM: 1 Nm โ‰ˆ 0.157 kW.

How to Calculate kW from Nm

  1. Note the torque T in Newton-meters and the speed RPM.
  2. Apply kW = (T ร— 2ฯ€ ร— RPM) / (60 ร— 1000) or the shortcut kW โ‰ˆ T ร— RPM / 9550.
  3. Compute power in kilowatts and verify with the calculator above.

Example: With T = 120 Nm at 1500 RPM, power โ‰ˆ 120 ร— 1500 / 9550 = 18.85 kW.