Boat Speed Calculator

By completing the following fields you can determine the theoretical maximum speed of your boat / boat engine.
If the GPS-measured speed indicates a greater difference than 15%, you should replace the propeller.

Engine RPM: Usually between 5000 - 6000
Gear ratio : Usually 2.08
Prop. pitch: Pitch is the second number listed in the propeller description, usually between 7 -17

theoretical maximum speed : km/h