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Drone Flight Time Estimate — result sheet
Estimate usable drone flight time from battery voltage, capacity, average power draw, efficiency, and reserve percentage.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Usable flight time = voltage × amp-hours × efficiency × (1 − reserve) / average power.
The estimate converts nominal battery energy into hours of operation after applying explicit efficiency and reserve allowances.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Battery voltage — V; minimum 1.0E-6; maximum 1000
- Battery capacity — Ah; minimum 1.0E-6; maximum 10000
- Average power draw — W; minimum 1.0E-6; maximum 1000000
- Usable energy efficiency — %; minimum 1.0E-6; maximum 100
- Reserved battery — %; minimum 0; maximum 99.999999
Worked example
| Input | Value |
|---|---|
| Battery voltage | 22.2 |
| Battery capacity | 5 |
| Average power draw | 250 |
| Usable energy efficiency | 85 |
| Reserved battery | 20 |
Estimated usable time ≈ 0.302 hours, or 18.14 minutes.
Assumptions and limits
- Voltage, capacity, and power use compatible electrical units.
- Efficiency and reserve are constant planning percentages.
- Wind, payload, temperature, battery aging, discharge limits, and flight-controller behavior are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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