Enter the output torque (N-m), the input torque (N-m), and the gear ratio into the calculator to determine the Gearbox Efficiency Calculator. 

Gearbox Efficiency Calculator Formula

The following formula is used to calculate the Gearbox Efficiency Calculator.

Egear = OT / (IT * GR) *100

  • Where Egear is the Gearbox Efficiency Calculator (%)
  • OT is the output torque (N-m) 
  • IT is the input torque (N-m) 
  • GR is the gear ratio 

How to Calculate Gearbox Efficiency Calculator?

The following example problems outline how to calculate the Gearbox Efficiency Calculator.

Example Problem #1

  1. First, determine the output torque (N-m). In this example, the output torque (N-m) is given as 100 .
  2. Next, determine the input torque (N-m). For this problem, the input torque (N-m) is given as  30 .
  3. Next, determine the gear ratio. In this case, the gear ratio is found to be 4.
  4. Finally, calculate the Gearbox Efficiency Calculator using the formula above: 

Egear = OT / (IT * GR) *100

Inserting the values from above and solving yields: 

Egear = 100 / (30 * 4) *100 = 83.33 (%)


Example Problem #2

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as:

output torque (N-m) = 150

input torque (N-m) = 50

gear ratio = 5

Enter these given values yields: 

Egear = 150 / (50 *5) *100 = 60 (%)