PORT CALCULATOR
Sailing Polar Diagram Calculator
Calculate your sailboat’s speed using the Sailing Polar Diagram Calculator based on wind speed and angle.
What is the Sailing Polar Diagram Calculator & How does it work?
A sailboat polar diagram is a graphical representation of a sailboat’s performance in various wind conditions. It shows how the boat’s speed varies with different wind speeds and angles relative to the wind direction.
The relationship between the sailboat’s speed, wind speed, and angle can be described by the formula:
V = V_{\text{max}} \cdot \sin(\theta) \cdot \left(1 – \frac{\sin^3(\theta)}{2}\right)
V = Boat speed, Vmax = Maximum boat speed, θ = Angle of sail relative to the wind direction
This formula accounts for the effects of drag and lift on the sails, providing a more accurate prediction of the boat’s performance.
Parameters
Wind Speed (knots)
Angle of Sail (degrees)
Maximum Boat Speed (knots)
Results are for informational purposes only and do not constitute professional advice.