Crosswind Component Calculator

How to use this calculator

Enter three values: wind direction (where the wind is coming from), wind speed in knots, and runway heading (the runway number × 10, e.g. Runway 27 = 270°).

The calculator uses trigonometry to resolve the wind vector into two components relative to the runway centerline:

• Crosswind component — the wind acting perpendicular to the runway. This is the number your aircraft's crosswind limit applies to.
• Headwind component — the wind acting along the runway. Positive = headwind (helpful). Negative = tailwind (adds to ground speed on landing).

The math behind it

Let θ = angle between wind direction and runway heading:

Crosswind = Wind Speed × sin(θ)

Headwind = Wind Speed × cos(θ)

Common aircraft crosswind limits

Aircraft	Max demonstrated crosswind	Notes
Cessna 152	12 knots	Common primary trainer
Cessna 172 (all variants)	15 knots	Most common training aircraft
Piper Cherokee / Archer	17 knots	PA-28 series
Diamond DA40	20 knots	Good crosswind handling
Piper Seminole (multi)	17 knots	PA-44

⚠️ Always verify your specific aircraft's crosswind limit in the POH/AFM. "Maximum demonstrated crosswind" is not an absolute limit — it's the highest the test pilots evaluated during certification.

ATIS / METAR wind decoding

ATIS and METAR report winds as: DDDSSPGGG — direction (°), speed (kt), gusts if present. Example: 27015G22KT = wind from 270° at 15 knots, gusting to 22. For crosswind calculations, use the gust speed as the worst case.