Free Propeller Slip Calculator

How to use our free propeller slip calculator:
With known propeller pitch, (maximum) boat speed, gear ratio and engine speed in rpm just fill in the values on the ‘Propeller Slip’ tab. If you wish to calculate your propeller’s pitch with known the slip percentage, just click on the ‘Propeller Pitch’ tab. You can enter the boat’s speed in both knots and mph.