Aircraft Fuel Consumption Calculator
Estimate the total fuel cost of a flight based on distance, aircraft class burn rate, wind, and fuel price. Useful for pilots and charter operators planning trip budgets and comparing route economics.
Last updated: May 2026
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About this calculator
Fuel burn is the aircraft-planning number that everything else lands on: how much fuel to load, whether the destination airport is reachable, how much reserve is left. This calculator turns aircraft-specific inputs — cruise speed, distance, SFC (specific fuel consumption) — into total fuel required in gallons, liters, or kilograms, plus a per-hour burn rate for cruise planning.
How to calculate fuel burn
Fuel required = distance × (SFC / cruise TAS). For a piston GA aircraft, SFC is typically quoted in gallons per hour at cruise power; for jets and turboprops it's pounds or kilograms per hour, sometimes per thrust unit. Standard planning practice is to compute the trip fuel, add climb fuel, add taxi fuel (typically 15-20 min at ground idle), and add reserves (30-45 min VFR, 45 min IFR + alternate).
Cruise fuel burn by aircraft class
Small piston single (Cessna 172): 7-9 GPH. High-performance piston (Cirrus SR22): 15-17 GPH. Turboprop (King Air 350): ~90 GPH per engine at cruise. Regional jet (E175): ~600 kg/hr per engine. Narrowbody airliner (737-800): ~2,500 kg/hr total burn at cruise. Widebody (777-300ER): ~7,500 kg/hr at cruise. Fuel efficiency per seat-km actually improves with aircraft size within a class.
The 1-2-3 fuel rule for GA pilots
FAR 91.151: 30 minutes reserve VFR day, 45 minutes VFR night, 45 minutes IFR + fuel to alternate. Practical planning almost always uses "1 hour reserve" as the floor regardless of the legal minimum, because weather and traffic delays eat 15-30 minutes routinely. This calculator returns both the legal minimum and the practical planning number.
Fuel burn vs range
Range = usable fuel × cruise TAS / SFC. Doubling the fuel doesn't double the range — you're now carrying that fuel too, which increases weight and drag and reduces speed. For piston aircraft the effect is modest (5-10% penalty at max fuel); for jets it's significant (25%+ penalty at max fuel), which is why long-range routings often refuel enroute despite the added time.
How to use
Example — 1,200 nm trip, 25-knot headwind, fuel at $5.85/gal, at optimal cruise altitude (×1.0). Wind factor = 1 + 25 × 0.015 = 1.375; fuel = (1,200 × gal-per-nm) / 1.375, then × $5.85 × 1.0. A non-optimal altitude raises burn — low altitude ×1.15, very high ×1.08. A headwind increases cost through the divisor; the simplification is most reliable for positive headwinds.
Frequently asked questions
How does headwind versus tailwind affect aircraft fuel burn per nautical mile?
Wind affects ground speed but not airspeed: a 400-kt airspeed aircraft with a 50-kt headwind has a 350-kt ground speed and takes longer to cover the same distance, burning more fuel for the trip. A tailwind of equal magnitude raises ground speed to 450 kts and reduces total fuel for the same route by approximately the same percentage. Rule of thumb: each knot of headwind on a 400-kt aircraft adds about 0.25% to trip fuel; each knot of tailwind subtracts roughly the same. So a 50-kt headwind on a transatlantic flight (typical at certain jet stream altitudes) can add 12–15% to fuel burn, while a strong tailwind can save 15–20%. Pilots plan routes and altitudes to take advantage of favorable winds — eastbound transatlantic flights typically fly higher in the jet stream, westbound flights fly lower to avoid it. The actual relationship is non-linear and depends on cruise mach number, which is why airline dispatch uses sophisticated wind-routing software.
What fuel burn rates apply to common aircraft categories, and where do I find precise figures?
Typical cruise fuel burn rates by category: light piston single (Cessna 172) ≈ 8–10 gal/hr at 110-kt cruise ≈ 0.08 gal/nm; light twin piston (Baron) ≈ 25–35 gal/hr at 180 kts ≈ 0.18 gal/nm; turboprop (King Air) ≈ 60–90 gal/hr at 280 kts ≈ 0.27 gal/nm; light jet (Citation CJ3) ≈ 150–200 gal/hr at 415 kts ≈ 0.43 gal/nm; midsize jet (Hawker 800XP) ≈ 280–360 gal/hr at 440 kts ≈ 0.74 gal/nm; super-midsize (Citation Sovereign) ≈ 320–400 gal/hr at 450 kts ≈ 0.81 gal/nm; heavy jet (Gulfstream G550) ≈ 450–600 gal/hr at 470 kts ≈ 1.13 gal/nm; narrow-body airliner (Boeing 737-800) ≈ 800–900 gal/hr at 450 kts ≈ 1.93 gal/nm; wide-body (Boeing 777) ≈ 1,800–2,200 gal/hr at 490 kts ≈ 4.1 gal/nm. For precise planning, always reference the specific aircraft's Pilot Operating Handbook (POH) for piston/turboprop aircraft, or Flight Planning charts for jets — these provide burn rates as functions of altitude, weight, ISA deviation, and Mach number. Manufacturer data is the authoritative source; parametric calculators are useful only for ballpark trip budgeting.
What is required reserve fuel for IFR flights and how does it affect total fuel load?
FAA Part 91 IFR (14 CFR 91.167) requires fuel to fly to the destination, then to the most distant alternate airport, then 45 minutes at normal cruise speed. Part 135 (charter) and Part 121 (airline) have stricter requirements: Part 121 domestic requires destination + alternate + 45 min reserve; international flights add holding fuel and contingency fuel of 10% of trip burn. EASA rules are similar. For a typical 2-hour trip in a midsize jet burning 320 gal/hr, total fuel uplift might be: trip fuel 640 gal + alternate 200 gal + reserve 240 gal = 1,080 gal — about 70% more than the raw trip burn. Long-range international flights often carry 30–40% more total fuel than trip-fuel-only calculation because of these requirements plus payload-range trade-offs. Some operators also carry 'tankering' fuel (extra fuel loaded at the origin because fuel is cheaper there than at the destination), which has its own economic break-even calculation considering the extra weight's fuel cost. Always include all reserves in fuel cost estimates for accurate trip budgeting.
What are common mistakes when estimating aircraft fuel cost?
The most common mistake is using cruise-only burn rates for the entire flight — climb burn is 2–3× cruise burn for the first 15–25 minutes, taxi burn is essentially wasted (no progress), and descent burn is near idle. For a 90-minute trip, the climb-cruise-descent profile actually burns 10–20% more total fuel than (cruise burn × flight time). Another error is using planning ground speed instead of actual ground speed (cruise speed minus headwind); a 50-kt headwind on a 400-kt jet adds 14% to trip time and 14% to fuel. Forgetting reserves (45 min + alternate + climb fuel) understates total fuel uplift by 30–60% for typical IFR trips. Using outdated fuel prices when Jet A prices have shifted 20% in 6 months understates current cost. Ignoring weight effects: a fully loaded jet burns 5–10% more than at light weight. Not accounting for taxi time at congested airports: at LaGuardia or Heathrow, taxi-out can be 30+ minutes, burning 200–400 gallons that don't move the aircraft. Finally, ignoring tankering economics on out-and-back trips where carrying enough fuel for both legs may be cheaper than buying expensive fuel at the destination.
When should I NOT use this calculator?
Skip this parametric formula for actual flight planning or fuel order decisions — use the aircraft's certified performance charts, a professional flight planning tool (ForeFlight, Jeppesen, SkyDemon, Lido), or your operator's dispatch software, which account for climb/descent profiles, weight, altitude, ISA temperature deviation, wind aloft forecasts, and required reserves. Do not use it for piston aircraft (Cessna, Piper) where the per-nm rate varies enormously with cruise power setting (45%, 65%, 75% power yield 30–60% burn rate differences); use the POH cruise tables instead. Avoid it for short flights under ~30 minutes where climb fuel dominates over cruise — the cruise-rate approximation badly understates total fuel. For very long international flights (4+ hours), the burn rate changes substantially as weight decreases over the flight — sophisticated planning software integrates this. Do not use it for fuel-cost-sensitive route economics decisions where 5–10% accuracy matters; the parametric model is reliable only to ±20–30%. Finally, for any actual aircraft fueling decision, consult dispatch or refer to certified performance data — relying on a calculator for fuel-load decisions creates serious safety risk if the formula understates needed fuel.
How do I calculate fuel burn for a flight?
Fuel required = distance × (fuel flow rate ÷ cruise true airspeed). For a Cessna 172 burning 8 GPH at 120 KTAS over a 300 nm trip: 300 × (8 / 120) = 20 gallons trip fuel, plus climb, taxi, and reserves.