Enter the tip speed (mph/knots) and the wind speed (mph/knots) into the Tip Speed Ratio Calculator. The calculator will evaluate and display the Tip Speed Ratio. 

Tip Speed Ratio Formula

The following formula is used to calculate the Tip Speed Ratio. 


  • Where TSR is the Tip Speed Ratio ( )
  • TS is the tip speed (mph/knots) 
  • WS is the wind speed (mph/knots) 

How to Calculate Tip Speed Ratio?

The following example problems outline how to calculate Tip Speed Ratio.

Example Problem #1:

  1. First, determine the tip speed (mph/knots). 
    • The tip speed (mph/knots) is given as: 15.
  2. Next, determine the wind speed (mph/knots). 
    • The wind speed (mph/knots) is provided as: 30.
  3. Finally, calculate the Tip Speed Ratio using the equation above: 


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

TSR = 15 / 30 = .500

Example Problem #2: 

For this problem, the variables required are provided below:

tip speed (mph/knots) = 16

wind speed (mph/knots) = 40

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

TSR = TS / WS = ?