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Drone Flight Time & Coverage Calculator

Battery endurance, batteries needed, and acreage per flight.

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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

Usable flight time per battery (min)

13.1

Total airtime with your batteries (min)

52.4

Acres covered per flight

32.7

Batteries needed for the job

2

Total flight minutes for the job

16.0

Endurance penalty from wind & payload

14.5%

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How to use this

  1. 1Enter battery capacity (mAh).
  2. 2Enter average current draw (A).
  3. 3Enter reserve you won't use (%).
  4. 4Enter extra payload (g).
  5. 5Enter wind speed (mph).
  6. 6Enter acres to cover.
  7. 7Enter mapping rate (acres/min).
  8. 8Enter batteries on hand.
  9. 9Read your usable flight time per battery (min) on the right — it updates as you type.
  10. 10Hit Share to keep the scenario or send it to someone.

About this calculator

Real drone endurance is well below the spec sheet once you account for the reserve you should never dip into, wind, and payload. This estimates usable flight time and how many batteries a mapping or inspection job actually needs.

FormulaFlight min = (battery mAh ÷ 1000) × usable ÷ average draw (A) × 60, derated for wind and payload.

Worked example

Using the values the calculator loads with:

Inputs

  • Battery capacity: 5000 mAh
  • Average current draw: 15 A
  • Reserve you won't use: 25 %
  • Extra payload: 0 g
  • Wind speed: 8 mph
  • Acres to cover: 40
  • Mapping rate: 2.5 acres/min
  • Batteries on hand: 4

Results

  • Usable flight time per battery (min): 13.1
  • Total airtime with your batteries (min): 52.4
  • Acres covered per flight: 32.7
  • Batteries needed for the job: 2
  • Total flight minutes for the job: 16
  • Endurance penalty from wind & payload: 14.5%

What each field means

Inputs

Battery capacity (mAh)
The battery capacity used in the calculation, measured in mAh. Starts at 5000 mAh so you have a working example on load.
Average current draw (A)
The average current draw used in the calculation, measured in A. Starts at 15 A so you have a working example on load.
Reserve you won't use (%)
The reserve you won't use used in the calculation, measured in %. Starts at 25 % so you have a working example on load. Accepted range: 0–60 %.
Extra payload (g)
The extra payload used in the calculation, measured in g. Starts at 0 g so you have a working example on load.
Wind speed (mph)
The wind speed used in the calculation, measured in mph. Starts at 8 mph so you have a working example on load. Accepted range: 0–40 mph.
Acres to cover
The acres to cover used in the calculation. Starts at 40 so you have a working example on load.
Mapping rate (acres/min)
The mapping rate used in the calculation, measured in acres/min. Starts at 2.5 acres/min so you have a working example on load.
Batteries on hand
The batteries on hand used in the calculation. Starts at 4 so you have a working example on load.

Results

Usable flight time per battery (min)
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 airtime with your batteries (min)
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Acres covered per flight
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Batteries needed for the job
Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Total flight minutes for the job
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Endurance penalty from wind & payload
Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

Why keep a 25% reserve?

LiPo voltage sags hard at the bottom of the pack, and headwind on the return leg costs more than the outbound saved. Landing at 25% is what keeps batteries healthy and aircraft recoverable.

How much does wind cut endurance?

Roughly 10–20% at 10 mph and up to 40% near the aircraft's rated limit, because the drone tilts and burns extra current just to hold position.

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.

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Cite this calculator

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APA
RevenueLab. (2026). Drone Flight Time Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/drone-flight-time
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<p>Source: <a href="https://www.revenuelab.fyi/toolbox/drone-flight-time" target="_blank" rel="noopener">Drone Flight Time Calculator — RevenueLab</a> (2026).</p>
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Source: [Drone Flight Time Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/drone-flight-time) (2026).
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