VMG to Wind Calculator

Windex Setup

NOTE: Zero or blank entries will be replaced with default values.

Click Here for Calibration Method

Flag spacing:deg
Enter flag width: deg
Enter tail width: deg


Enter angle of the wind:deg True Apparent
Wind Speed:knots True Apparent
Boat Speedknots


VMG to wind 3.54
T Wind Direction 53.8°
T Wind Speed 7.4
Apparent Wind Speed 12
Boat Speed 6
Apparent Wind Direction 30
TWS = AWS - BS * 0.76
Boat speed as % of true wind speed 80.7
VMG as % of true wind speed 47.7

masthead fly

Click on graph to print out larger paper that you can plot other points on.

NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE