Flight Planning Tool

Descent Time & Distance Calculator

Enter the cruising altitude, level-off altitude, descent speed, and descent rate your aircraft will use, and this tool will calculate how long the descent will take and how much ground distance it will cover.
FT
FT
KTS
FPM
Time Required
--min
Distance Covered
--NM
Level-off altitude must be lower than cruising altitude, and descent rate must be greater than zero.
Time = (Cruising Altitude − Level Off Altitude) ÷ Descent Rate. Distance = (Time ÷ 60) × Descent Speed. For flight planning reference only — always verify against your aircraft's POH and current conditions.