Prop Pitch Calculator

Theoretical Propeller Pitch Speed

A propeller’s pitch is the theoretical forward distance it would travel in one revolution if it moved through a solid like a screw through wood, with zero slip. The theoretical (100% efficient) speed is Speed (mph) = (Pitch in inches × RPM) ÷ 1056, where 1056 converts inches per minute into miles per hour.

In practice, propellers always experience some slip because they move through a fluid (air or water) rather than a solid, so actual speed is always somewhat lower than this theoretical figure — see the related Prop Slip Calculator to quantify that difference.