Fill ground speeds from winds aloft
Uses the NOAA winds and temps aloft forecast near an airport along your route: your TAS and true course become start and end ground speeds.
Start down
28 NM out
Time in descent
14 min
Altitude to lose
7,000 ft
Path angle
2.4 °
Quick cross checks: the 3 to 1 rule says about 21 NM; a 3° profile would take 22 NM at 637 ft/min (ground speed × 5). Distances are over the ground, so plan with ground speed, not airspeed, and start down earlier with a tailwind.