Calculate theoretical speed and required pitch for boat and aircraft propellers.
Propeller Stats
Calculation Results
Enter prop and engine data
About this calculator
Overview
Propeller pitch is the distance a propeller would move forward in one rotation if it were moving through a soft solid (like a screw in wood). In water or air, there is always some 'slip'.
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Pro Tips
Pitch is usually measured in inches per revolution.
Theoretical speed is calculated assuming 0% slip.
Practical slip for boats is usually between 10% and 25%.
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Fun Facts
"A 'square' wheel or prop has a pitch equal to its diameter."
"Variable pitch propellers can adjust their angle during flight or cruise for better efficiency."
"The formula v = (Pitch * RPM) / 1056 converts inches per minute to miles per hour."
