Enter the total power (kW) and the total rotational speed (RPM) into the calculator to determine the Torque From Power. 

Power To Torque Calculator

Enter any 2 values to calculate the missing variable

Torque From Power Formula

The following formula is used to calculate the Torque From Power. 

T = P * 60 / (2*pi*RPM)
  • Where T is the Torque From Power (N-m)
  • p is the total power (W) 
  • RPM is the total rotational speed (RPM) 

To calculate torque from power, multiply the power by 60, then divide by the result of 2 times pi times the RPM.

Power to Torque Conversion Table (n = 1800 RPM)
Power (kW) Speed (RPM) Torque (Nm)
0.2518001.326
0.3718001.962
0.5518002.918
0.7518003.979
1.118005.836
1.518007.958
2.2180011.672
3180015.917
4180021.222
5.5180029.181
7.5180039.792
11180058.361
15180079.583
18.5180098.153
221800116.722
301800159.167
371800196.306
451800238.750
551800291.806
751800397.917
* Rounded to 3 decimals. Formula: T (Nm) = 9550 × P (kW) ÷ n (RPM). Speed held constant at 1800 RPM.

How to Calculate Torque From Power?

The following two example problems outline how to calculate the Torque From Power.

Example Problem #1:

  1. First, determine the total power (kW). In this example, the total power (kW) is measured to be 500.
  2. Next, determine the total rotational speed (RPM). For this problem, the total rotational speed (RPM) is calculated to be 30.
  3. Finally, calculate the Torque From Power using the formula above: 

T = P * 60 / (2*pi*RPM)

Inserting the values from above and solving the equation with the imputed values gives: 

T = 500 * 60 / (2*3.14159*30) = 159.155 N-m

Example Problem #2: 

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

total power (kW) = 780

total rotational speed (RPM) = 210

Entering these values into the formula or calculator above gives us:: 

T = 780 * 60 / (2*3.14159*210) = 35.468 (N-m)