Ground Speed Calculator

Enter your true course, true airspeed, and the wind to instantly compute ground speed, wind correction angle, true heading, and headwind/crosswind components.

Wind Triangle

Enter your true course and true airspeed, then the wind direction (FROM) and wind speed.

Speed unit

True course (°)

True airspeed (kt)

Wind direction FROM (°)

Wind speed (kt)

Result

Ground speed, wind correction angle, and the heading you need to hold the course.

Ground speed

Wind correction angle

-11.5°

correct left

True heading

348°

course + WCA

Headwind / tailwind

0 kt

headwind

Crosswind

20 kt

from left

Course 360°, TAS 100 kt, wind 270/20 computes to: ground speed 98.0 kt, WCA −11.5° (correct left), true heading 349°, no head/tailwind, 20 kt crosswind from the left.