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

- All Efficiency Calculators
- Gear Torque Calculator
- Gear Reduction Calculator
- Pulley 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**

- First, determine the output torque (N-m). In this example, the output torque (N-m) is given as 100 .
- Next, determine the input torque (N-m). For this problem, the input torque (N-m) is given as 30 .
- Next, determine the gear ratio. In this case, the gear ratio is found to be 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** **(%)