Aircraft Range Calculator
Estimate how far you can fly with your available fuel. Accounts for taxi/climb fuel, reserve requirements, and wind effects on range.
Limitations
- This is an estimate based on constant fuel flow and groundspeed. Actual range varies with altitude, power setting, mixture, aircraft loading, and atmospheric conditions.
- Fuel density varies slightly with temperature. This calculator uses standard fuel weights (100LL: 6.0 lbs/US gal, Jet-A: 6.7 lbs/US gal). For precise weight-limited planning, use your aircraft's actual fuel density.
- This calculator does not account for climb fuel burn, which is typically higher than cruise fuel flow. Use the taxi/climb allowance field to account for this.
Why This Matters to Pilots
Understanding your aircraft's range is essential for flight planning, especially for cross-country flights. A headwind that reduces your groundspeed by 20% reduces your range by the same proportion — a fact that catches pilots off guard on long legs.
Always plan conservatively. The range shown here assumes constant cruise conditions. In practice, climb fuel burn, deviations, and holding all reduce your effective range. Carry more fuel than the minimum whenever possible.
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Frequently Asked Questions
This calculator is for educational and planning purposes only. Always refer to your aircraft's POH/AFM, current NOTAMs, and official weather briefings. No calculator is a substitute for pilot-in-command judgment or CFI guidance. Read our full Safety Disclaimer.
Last reviewed: July 2026
Aircraft Range in Depth
Range is the distance an aircraft can travel over the ground on its usable fuel, and unlike endurance it depends heavily on the wind. A given fuel load buys a fixed number of hours aloft, but how far those hours carry you depends on your groundspeed, which the wind can raise or lower substantially. This calculator combines fuel, burn rate, and speed into a realistic range figure you can compare against the distance you actually need to fly.
Understanding range is essential for route planning and fuel-stop decisions. The still-air range from the book is a useful reference, but the range that matters is the one corrected for the wind you will actually face, minus the distance sacrificed to reserves. Planning with the honest, wind-corrected number keeps a comfortable trip from quietly becoming a fuel-critical one.
Step-by-Step: How the Calculation Works
Range is endurance multiplied by groundspeed. First find usable endurance: usable fuel divided by burn rate, minus the reserve time. Then multiply that available time by the groundspeed you expect — true airspeed adjusted for the headwind or tailwind component. Forty gallons at 10 gallons per hour is four hours gross; holding back 45 minutes leaves 3.25 hours, and at a 130-knot groundspeed that is about 422 nautical miles.
Because groundspeed drives the result, the same aircraft and fuel produce very different ranges into a headwind versus with a tailwind. A 20-knot headwind on a 130-knot true airspeed cuts groundspeed to 110 knots and range in the example above to about 358 nautical miles — a 15 percent reduction from wind alone. The calculator lets you enter the groundspeed you expect so the range reflects reality.
More Worked Examples
Example 1 — Still-air range
Usable fuel 50 gallons, burn 11 gallons per hour, reserve 45 minutes. Gross endurance is about 4.5 hours; usable is 3.75 hours. At a 140-knot true airspeed in calm wind, range is roughly 525 nautical miles before a fuel stop is required.
Example 2 — Range into a headwind
The same aircraft flies into a 25-knot headwind, dropping groundspeed to 115 knots. The usable 3.75 hours now covers only about 431 nautical miles — nearly 100 miles less than the calm-wind figure, which may turn a nonstop plan into a two-leg trip with a fuel stop.
Pilot Decision-Making Context
Range planning is fundamentally about margins. A route that fits within your calm-air range but not your headwind range is a route that depends on the forecast being right, and forecasts are not guarantees. The safe practice is to plan fuel stops so that each leg fits comfortably inside your wind-corrected range with the reserve intact, leaving room for a diversion if the destination is unavailable.
Range also informs the speed-versus-economy choice. Flying at a maximum-range airspeed extracts the most distance per gallon, which can eliminate a fuel stop on a long trip, while a faster cruise trades some range for a shorter flight time. Computing range at both settings lets you decide whether the time saved is worth the extra stop.
More Questions Answered
Why is my real range shorter than the book range?
Book range figures typically assume calm wind, ideal leaning, and no reserve. Real range subtracts the reserve and corrects for headwinds, which together can reduce the usable figure substantially.
Does climbing to altitude help my range?
Often yes, because true airspeed rises and fuel burn can fall at altitude, but a strong headwind aloft can offset the gain. Compare groundspeed and burn at different altitudes to find the best trade.
Should range include the reserve fuel?
No. Usable range should be computed on fuel above the reserve, so that the reserve remains untouched when you reach the limit of your planned range.
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