Aircraft Range & Endurance Calculator

Plan realistic legs: enter usable fuel, fuel burn, true airspeed and wind to see endurance and range after the reserve you choose.

Range & Endurance Calculator

Calculate your aircraft's range and endurance with fuel reserves.

Cruise Speed (knots)

Fuel Capacity (gallons)

Fuel Burn Rate (GPH)

Fuel Reserves

Headwind Component (knots)Use negative value for tailwind

Endurance

5.5 hrs

No-Wind Range

770 NM

Range w/ Wind

770 NM

Total Fuel

60 gal

Usable Fuel

55 gal

Reserve Fuel

5 gal

Ground Speed

140 kts

Important: These calculations are for planning purposes only. Always verify fuel quantities visually before flight and comply with FAR 91.151 (VFR) or FAR 91.167 (IFR) fuel reserve requirements.

How the calculation works

Endurance is usable fuel divided by fuel burn. The reserve is subtracted as time at cruise burn, and the remaining time is multiplied by groundspeed (true airspeed adjusted for wind). Always use your POH figures for the specific aircraft and conditions.

Frequently asked questions

What fuel reserve does the FAA require?

For airplanes under 14 CFR 91.151, VFR day flights need enough fuel to reach the first point of intended landing plus 30 minutes at normal cruise (45 minutes at night). IFR flights under 91.167 need fuel to the destination, the alternate if required, then 45 minutes at normal cruise.

How does wind affect range?

Range is endurance multiplied by groundspeed. A headwind reduces groundspeed and therefore range; a tailwind increases it. Endurance in hours does not change with wind.

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