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
Course & Speed
°
Wind
°
KT
Corrections
°
Intermediate Values
Course Calculation Flow
TC
247°
VAR
9.9°W
MC
257°
WCA
-3°
MH
254°
Dev
0°
CC
254°
TC: True Course
MC: Magnetic Course
MH: Magnetic Heading(aka “True Heading”)
CC: Compass Course
VAR: Magnetic Variation
WCA: Wind Correction Angle
Dev: Compass Deviation
WCA
-3°
MH
254°
Crosswind
5 KT
from left
Tailwind
8 KT
ETAS
—
WCA ≤ 10°
Results
Ground Speed
108
KT
Compass Course
254°
= magnetic heading
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.