Split any wind into crosswind and headwind components for a runway heading, in knots, mph or km/h.
Result
How to use this tool
Enter the wind speed and choose knots, mph or km/h.
Enter the direction the wind comes from in degrees.
Enter the runway heading in degrees.
Read the crosswind, headwind or tailwind, angle, and converted speeds.
Formula & worked example
A 20-knot wind at 90° to the runway gives a 20-knot crosswind and no headwind; at 45° it gives 14.14 knots of each.
Limitations — read this before you rely on it
Steady wind only; it does not model gusts, wind shear, or runway slope, and it is not a substitute for an aircraft operating limit.
Frequently asked questions
From, as in aviation reports: a 090 wind blows from the east toward the west.
The part of the wind blowing across the runway: speed x sin(angle between wind and runway).
A tailwind: the wind is pushing from behind rather than into the aircraft nose.
Angles above 180° are the same crosswind geometry mirrored, so the difference is folded to 0–180°.
No. Compare the crosswind component with the aircraft or operator limit yourself; this tool only computes the component.