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

Torque From RPM Formula

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

T = 5252.08 * P / S
  • Where T is the Torque From RPM (lb-ft)
  • P is the total power (HP) 
  • S is the rotational speed (RPM) 

To calculate the torque from RPM, multiply the the horsepower by 5252.08, then divide the rotational speed.

How to Calculate Torque From RPM?

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

Example Problem #1:

  1. First, determine the total power (HP). In this example, the total power (HP) is measured to be 500.
  2. Next, determine the rotational speed (RPM). For this problem, the rotational speed (RPM) is calculated to be 1000.
  3. Finally, calculate the Torque From RPM using the formula above: 

T = 5252.08 * P / S

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

T = 5252.08 * 500 / 1000 = 2626.04 (lb-ft)

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 (HP) = 600

rotational speed (RPM) = 2000

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

T = 5252.08 * 600 / 2000 = 1575.62 (lb-ft)