Use this calculator for flight-planning study or a first-pass cross-check when all inputs describe the same aircraft, atmospheric condition, and phase of flight.

Gust (kt)

Peak reported gust.

Sustained wind (kt)

Sustained wind speed.

Compute the gust spread (peak gust minus sustained wind) for runway crosswind assessment. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Gust spread (kt)

Difference between peak gust and sustained wind; larger spreads indicate unstable conditions.

• Do not use a generic calculator in place of the current aircraft flight manual, approved performance data, operating limitations, NOTAMs, weather, or regulations. Real performance changes with configuration, runway condition, altitude, temperature, wind, loading, and technique.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Cross-check the result against the aircraft flight manual or approved planning system, then apply the required safety margins. Keep signed wind, heading, altitude, speed, and fuel conventions explicit.

• Crosswind Gust Component Calculator

  Compute the crosswind component of a peak gust at a given angle to the runway.

• Crosswind Component Calculator

  Compute the magnitude of the crosswind component of a wind at an angle to the runway or course.

• Crosswind Takeoff Check

  Resolve wind speed into an absolute crosswind component relative to runway heading and compare it with a user-supplied aircraft or pilot limit. This checks only the wind component, not runway condition or takeoff performance.