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Geometric Propeller Pitch Calculator — result sheet
Estimate theoretical propeller pitch from blade angle and the reference radius of the blade section.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Geometric pitch = 2πR tan(β), using radius at the selected reference blade station.
Geometric pitch is the ideal no-slip advance per revolution at the entered blade section; actual advance can be lower because of propeller slip.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Reference radius — in; minimum 1.0E-6; maximum 1000000
- Blade angle — °; minimum 1.0E-6; maximum 89.999999
Worked example
| Input | Value |
|---|---|
| Reference radius | 12 |
| Blade angle | 20 |
Geometric pitch is about 27.44 in.
Assumptions and limits
- The blade angle is measured from the plane of rotation and the radius and pitch share one length unit.
- The blade section is treated as a helical geometry with no slip at the reference station.
- Thrust, torque, air or water density, blade twist, inflow, efficiency, and structural limits are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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