Verify before flight. Check the POH/AFM for aircraft-specific limits and performance.
Flight Planning
Time / Speed / Distance Calculator
Solve flight time, distance, and groundspeed together for quick cross-country planning and time-speed-distance checks.
NM
kt
hr
Time from distance/speed—
Distance from speed/time—
Speed from distance/time—
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180 NM at 120 knots
180 NM at 120 kt takes 180 / 120 = 1.5 hours, or 1 hour 30 minutes. At 100 kt, the same distance takes 1.8 hours.
The distance, speed and time entries generate separate rearrangements of the formula. They need not describe one consistent trip unless you make the inputs agree.
Formula and method
Distance = speed × time. Rearranging the same relationship gives time = distance ÷ speed and speed = distance ÷ time.