Prop Slip Calculator

Here is the formula for figuring your theoretical speed.

(Pitch x RPM) / (Gear Ratio x 1056 = Theoretical Speed

Here is the formula to calculate your Prop Slip.

theoretical speed - Actual Speed / theoretical speed = Prop Slip

Use this calculator to figure out just about anything in regard to propeller, ratio, RPM and speed. You can change one parameter and recalculate the rest.