Crosswind Calculator

Adjust the calculator values below

Relative wind angle 60° from right
Steady crosswind component 17.32 kn
Crosswind direction From right
Steady headwind component 10 kn
Steady tailwind component 0 kn
Gust crosswind component 21.65 kn
Gust headwind component 12.5 kn
Gust tailwind component 0 kn
Entered crosswind comparison Not entered
Crosswind margin Not entered
Entered tailwind comparison Not entered
Tailwind margin Not entered
Comparison status No comparison values entered
17.32 kn from right
Steady crosswind component Absolute lateral wind component; direction is relative to the selected runway direction
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Crosswind Calculator

Use this crosswind with wind speed, runway direction of travel, and wind from direction to get fast results, understand the formula behind the...

How wind components are calculated

The calculator normalizes the angular difference between the wind-from direction and runway direction to the shortest signed angle. Crosswind is wind speed multiplied by the sine of that angle; the along-runway component is wind speed multiplied by its cosine. A positive along-runway value is reported as headwind and a negative value as tailwind.

Use matching directions and units

Use the runway direction for the actual takeoff or landing direction, not the reciprocal end. Wind-from direction and runway heading must use the same north reference. Tower-reported wind in the United States is magnetic, while other weather sources may report true direction. Runway designators approximate magnetic azimuth rounded to the nearest ten degrees, so a published runway heading can be more precise. All wind, gust, and comparison speeds must use the selected speed unit.

Do not treat this as an operating approval

The trigonometry does not decide whether an operation is safe or permitted. Aircraft capability, demonstrated crosswind information, approved limitations, operator procedures, pilot proficiency, runway contamination and braking, gusts, wind variability, obstacles, and current airport conditions all matter. The optional comparison fields accept user-entered values only; verify them against the applicable aircraft documents and operating rules, and use official current weather and airport information.

Frequently asked questions

Common questions about crosswind, useful assumptions, result interpretation, and mistakes to avoid.

What does crosswind mean?

Crosswind describes a specific relationship between the values you enter, especially Wind speed and Runway direction of travel. The result is useful when those values describe the same real-world case.

When is crosswind useful?

Crosswind is useful when you need a quick estimate before comparing options, checking a document, planning a task, or explaining a number to someone else.

Which assumptions matter most for crosswind?

The most important assumptions are the ones behind Wind speed, Runway direction of travel, units, timing, and scope. If those assumptions are wrong, relative wind angle can look precise but still be misleading.

How should I interpret crosswind?

Read relative wind angle with the inputs beside it. A high or low answer only makes sense after you know the unit, time period, comparison point, and any limits of the calculation.

Why might crosswind look different somewhere else?

Another tool may use different rounding, units, default assumptions, formulas, or boundaries. Compare the inputs before assuming either answer is wrong.

What mistake should I avoid with crosswind?

Avoid mixing values from different people, projects, dates, unit systems, or scenarios. The calculation works best when every input belongs to the same case.

What should I compare with crosswind?

Age Calculator can help with a nearby question when you want a second view of the same decision, measurement, or planning problem.