Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Range with reserve (nm)
514
Total endurance (hrs)
5.65
Hours after reserve
4.90
Ground speed (kts)
105
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter usable fuel (gal).
- 2Enter fuel burn (gph).
- 3Enter true airspeed (kts).
- 4Enter headwind (−) / tailwind (+) (kts).
- 5Enter reserve required (min).
- 6Read your range with reserve (nm) on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Enter usable fuel and burn rate to get endurance, still-air range, and whether you keep legal VFR reserves.
Worked example
Using the values the calculator loads with:
Inputs
- Usable fuel: 48 gal
- Fuel burn: 8.5 gph
- True airspeed: 115 kts
- Headwind (−) / tailwind (+): -10 kts
- Reserve required: 45 min
Results
- Range with reserve (nm): 514
- Total endurance (hrs): 5.65
- Hours after reserve: 4.9
- Ground speed (kts): 105
What each field means
Inputs
- Usable fuel (gal)
- The usable fuel used in the calculation, measured in gal. Starts at 48 gal so you have a working example on load.
- Fuel burn (gph)
- The fuel burn used in the calculation, measured in gph. Starts at 8.5 gph so you have a working example on load.
- True airspeed (kts)
- The true airspeed used in the calculation, measured in kts. Starts at 115 kts so you have a working example on load.
- Headwind (−) / tailwind (+) (kts)
- The headwind (−) / tailwind (+) used in the calculation, measured in kts. Starts at -10 kts so you have a working example on load.
- Reserve required (min)
- The reserve required used in the calculation, measured in min. Starts at 45 min so you have a working example on load.
Results
- Range with reserve (nm)
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total endurance (hrs)
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Hours after reserve
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Ground speed (kts)
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the aircraft fuel burn & endurance calculator work?
Enter usable fuel and burn rate to get endurance, still-air range, and whether you keep legal VFR reserves.
What do I need to enter?
5 values: usable fuel, fuel burn, true airspeed, headwind (−) / tailwind (+), and reserve required. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the range with reserve (nm) result mean?
It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary.
Who is this tool for?
It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Aircraft Fuel Burn & Endurance Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/aircraft-fuel-burn
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/aircraft-fuel-burn" target="_blank" rel="noopener">Aircraft Fuel Burn & Endurance Calculator — RevenueLab</a> (2026).</p>
Source: [Aircraft Fuel Burn & Endurance Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/aircraft-fuel-burn) (2026).