Enter the equipment speed (RPM) and the engine speed (RPM) into the PTO Ratio Calculator. The calculator will evaluate and display the PTO Ratio. 

PTO Ratio Formula

The following formula is used to calculate the PTO Ratio. 

PTOR = EQ / ES * 100

  • Where PTOR is the PTO Ratio (%)
  • EQ is the equipment speed (RPM) 
  • ES is the engine speed (RPM) 

How to Calculate PTO Ratio?

The following example problems outline how to calculate PTO Ratio.

Example Problem #1:

  1. First, determine the equipment speed (RPM). 
    • The equipment speed (RPM) is given as: 500.
  2. Next, determine the engine speed (RPM). 
    • The engine speed (RPM) is provided as: 8000.
  3. Finally, calculate the PTO Ratio using the equation above: 

PTOR = EQ / ES * 100

The values given above are inserted into the equation below and the solution is calculated:

PTOR = 500 / 8000 * 100 = 6.25 (%)


Example Problem #2: 

For this problem, the variables required are provided below:

equipment speed (RPM) = 600

engine speed (RPM) = 1000

Test your knowledge using the equation and check your answer with the calculator above.

PTOR = EQ / ES * 100 = ?