Enter the stall current (amps) and the motor’s torque constant (N-m/amp) into the calculator to determine the Stall Torque. 

Stall Torque Formula

The following formula is used to calculate the Stall Torque. 

Tstall = Is * K

  • Where Tstall is the Stall Torque (N-m)
  • Is is the stall current (amps) 
  • K is the motor’s torque constant (N-m/amp) 

How to Calculate Stall Torque?

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

Example Problem #1:

  1. First, determine the stall current (amps). In this example, the stall current (amps) is measured to be 120.
  2. Next, determine the motor’s torque constant (N-m/amp). For this problem, the motor’s torque constant (N-m/amp) is calculated to be 50.
  3. Finally, calculate the Stall Torque using the formula above: 

Tstall = Is * K

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

Tstall = 120*50 = 6,000 (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:

stall current (amps) = 60

motor’s torque constant (N-m/amp) = 20

Entering these values yields:

Tstall = 60 * 20 = 1200 (N-m)