Course Calculator

Enter true heading, TAS, and wind to get compass course and ground speed

Search for two cities or airports to automatically populate True Course and Description fields

Calculate True Airspeed from CAS, OAT, and altitude

Load sample data to see how the calculator works

Description (Optional)

Course & Speed

True Course

True Airspeed

Wind

Wind Direction

Wind Speed

Corrections

Magnetic Variation

Compass Deviation

Note: This calculator uses standard aviation wind triangle formulas. Wind direction is where the wind is coming FROM. Positive WCA means turn right, negative means turn left. ETAS (Effective True Air Speed) is shown when WCA exceeds 10° to account for the reduced effective forward speed when crabbing at large angles. For complete flight planning with fuel, time estimates, and waypoints, use the Leg Planner.