Enter the maximum rotational speed (RPM) and the maximum horsepower (hp) into the calculator to determine the Maximum Torque. 

Maximum Torque Formula

The following formula is used to calculate the Maximum Torque. 

Tmax = 5252 / RS * HP
  • Where Tmax is the Maximum Torque (lb-ft)
  • RS is the maximum rotational speed (RPM) 
  • HP is the maximum horsepower (hp) 

To calculate the maximum torque, divide 5252 by the max rotational speed, then multiply by the maximum horsepower.

How to Calculate Maximum Torque?

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

Example Problem #1:

  1. First, determine the maximum rotational speed (RPM). In this example, the maximum rotational speed (RPM) is measured to be 40.
  2. Next, determine the maximum horsepower (hp). For this problem, the maximum horsepower (hp) is calculated to be 30.
  3. Finally, calculate the Maximum Torque using the formula above: 

Tmax = 5252 / RS * HP

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

Tmax = 5252 / 40 * 30 = 3939 (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:

maximum rotational speed (RPM) = 15

maximum horsepower (hp) = 29

Entering these values yields:

Tmax = 5252 / 15 * 29 = 10153.866 (lb-ft)