Crosswind Calculator

This works out the crosswind and headwind components on a runway from the runway heading, the direction the wind is coming from and its speed. Crosswind is the wind speed times the sine of the angle between them and headwind is the speed times the cosine, so a tailwind simply shows up as a negative headwind and is labelled as one. Because runway designators and the winds ATC and ATIS pass are magnetic while a written METAR is true, the page asks which reference your wind figure is in and converts it with the local variation. A second mode runs it backwards, giving the strongest total wind that keeps the crosswind component inside a figure you supply. That figure has to come from your aircraft flight manual, because nothing here knows what any aeroplane can take.

Calculator Type
Runway 09 is about 090 and runway 27 is about 270. Use the true published heading from the chart where you have it, since designators are rounded to the nearest ten degrees.
Only used when the wind above is a true direction. Leave at zero otherwise.
Knots, because that is what ATIS and a METAR pass and what the crosswind figure in a flight manual is written in. If your METAR reports metres per second, one knot is 1.852 km/h exactly, so multiply m/s by 3.6 and divide by 1.852.
Optional, and in knots like the steady wind above. Leave at zero if the wind is steady.
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Runway 09 is about 090 and runway 27 is about 270. Use the true published heading from the chart where you have it, since designators are rounded to the nearest ten degrees.
Only used when the wind above is a true direction. Leave at zero otherwise.
The number from your aircraft flight manual, or a lower personal one, in knots as the manual states it. This page does not supply it.
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