IFR Fuel Planning Calculator

Fuel requirements with alternate airport and reserve calculations per FAR 91.167.

Distance to destination (NM)

Groundspeed (kts)

Fuel burn (GPH)

Distance to alternate (NM)

Alternate groundspeed (kts)

Reserve time (min)

Taxi fuel (gal)

Contingency (%)

Usable fuel capacity (gal)

Fuel price ($/gal)

Tab to move between fields

Total fuel required (gal)

36.1

Enroute fuel (gal)20.8

Enroute time (min)125

Alternate fuel (gal)4.5

Reserve fuel (gal)7.5

Contingency fuel (gal)1.7

Fuel margin (gal)19.9

Max endurance (hrs)5.6

Fuel cost ($)$234.64

How to Use This Calculator

Enter distance to destination (NM), groundspeed (kts), and fuel burn (GPH) for the enroute segment.
Set distance to your filed alternate (NM) and alternate segment groundspeed.
Enter FAR-required reserve time (45 minutes for IFR Part 91) in minutes.
Review total fuel required, enroute fuel, alternate fuel, reserve fuel, and a contingency buffer.
Verify your fuel-on-board before departure exceeds the total required by a comfortable margin.

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