Wind Correction Angle Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

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Fluid calculations are especially sensitive to density, viscosity, geometry, pressure conventions, and unit systems. Wind Correction Angle Calculator narrows that problem to the relationship used on this page, making the displayed wind correction angle easier to audit against the inputs and the governing equation.

What this calculator does

The Wind Correction Angle Calculator uses True airspeed, Wind speed, Course, Wind direction to estimate the page’s Wind correction angle from the fluid-mechanics relationship below. It is meant for a defined geometry and property set, so the useful part is not just the headline number but also whether your density, viscosity, dimensions, pressure reference, and flow convention match the model.

How to use it

Start with the fields that actually drive this result: True airspeed, Wind speed, Course, Wind direction. Keep units consistent with the menus beside the fields and avoid mixing values measured under different conditions. After calculating, change one input at a time if you are comparing scenarios; that makes cause-and-effect much easier to see.

How the calculation works

The page resolves wind relative to desired course, computes wind-correction angle with an arcsine crosswind relation, then estimates heading and ground speed from true airspeed and wind components.

Example

Using the page’s default example (True airspeed = 100 kn; Wind speed = 20 kn; Course = 90 deg; Wind direction = 120 deg), the calculator reports Wind correction angle of 5.73917 deg. Change one driving input at a time and confirm the result moves in the direction predicted by the equation; that is a quick way to catch a unit or mode mistake.

How to interpret the result

Use the wind-correction angle to offset the desired course into a heading, and read the ground-speed value as the along-track speed predicted by the same wind triangle. A positive or negative correction only makes sense after confirming the page’s wind-direction convention and angle reference.

Limitations and notes

Wind-direction conventions matter: aviation reports often state the direction wind comes from, while vector formulas can use direction toward. Make sure the page’s direction convention matches your source data, especially before flight planning.