Work out descent rate instantly with clear inputs, formula shown and shareable results.
Descent rate follows from the geometry: the required gradient is altitude divided by distance, and the rate in feet per minute is that gradient multiplied by ground speed in nautical miles per minute. The familiar 3 degree profile is about 318 ft per nautical mile, or roughly five times ground speed in knots.
Descent rate
ROD = (altitude / distance) x GS / 60; angle = atan(ft per nm / 6076.12)
Aviation results are planning estimates only. Always verify take-off, landing, fuel, weight and balance figures against the certified Aircraft Flight Manual, current performance charts and applicable aviation regulations before flight.
For a 3 degree path, rate of descent in ft/min is approximately ground speed in knots multiplied by five — 700 ft/min at 140 kt.
Yes. A tailwind raises ground speed, so the same 3 degree path needs a higher rate of descent in ft/min.