Propeller Pitch Calculator
Free calculate propeller pitch, advance ratio, and theoretical speed for boat propellers. Get instant, accurate results with our easy-to-use calculator.
Input Parameters
Propeller RPM = Engine RPM / Gear Ratio
Results
Enter parameters to calculate
Propeller Pitch Formulas
Theoretical Speed
Speed (mph) = (Pitch × RPM) / (Gear Ratio × 1056)
Pitch Calculation
Pitch = (Speed × Gear Ratio × 1056) / RPM
Advance Ratio
J = V / (n × D)
Where:
- • V = vessel speed (m/s)
- • n = propeller RPM (rev/s)
- • D = propeller diameter (m)