True Wind Calculator

Calculate true wind speed and direction from apparent wind and vessel data.

Vessel Course (°T)

Vessel Speed (knots)

Apparent Wind Speed (knots)

Apparent Wind Angle (°, 0–360 clockwise from bow) 000 = ahead · 090 = starboard beam · 180 = astern · 270 = port beam

True Wind Speed

—kts

True Wind Direction—