Prop Slip Calculation

Prop Slip Calculator

Enter boat speed (knots):

Enter engine RPM (revolutions per minute):

Enter propeller pitch (inches):

Calculate Prop Slip

Save this calculator as a favorite and use it as often as you like: bookmark this calculator or press Ctrl+D.

This is how it works

Enter your boat speed in knots, engine RPM, and propeller pitch in inches. Click “Calculate Prop Slip” to determine the percentage of slip in your propeller’s efficiency. The tool instantly calculates how much power is lost due to slip.

Why use it?

Understanding propeller slip is essential for optimizing boat performance and fuel efficiency. A high slip percentage indicates that the propeller is not efficiently converting engine power into movement, potentially leading to increased fuel consumption and reduced speed. This tool helps captains and boaters assess whether they need a different propeller setup for better performance.