Drone Flight Time Calculator
Estimate how long your drone will fly on a single battery charge.
Enter battery capacity, voltage, and average power draw to calculate flight time.
Drone flight time depends on how much energy is stored in the battery and how fast the drone consumes that energy in the air. This calculator uses the battery capacity, voltage, and average power draw to estimate real-world flight time.
Formula:
Flight time (min) = (Battery capacity mAh × Voltage × Efficiency) / (Average power W × 1000) × 60
Which simplifies to:
Flight time (min) = (mAh × V × 0.001 × 60 × 0.80) / W
The 0.80 efficiency factor accounts for:
- Real-world flight (wind, maneuvering, altitude changes)
- Battery voltage sag under load
- Reserve capacity (landing with some battery remaining is important)
- Temperature effects (cold weather reduces battery performance)
Battery capacity explained:
- mAh (milliamp-hours) = how much charge the battery stores
- Wh (watt-hours) = actual energy stored = mAh × V / 1000
- A 5000 mAh, 11.1V battery stores 55.5 Wh of energy
Average power draw: This is the most variable factor. A drone uses far more power hovering at 90% throttle in a headwind than cruising slowly in calm air. Most DJI-style consumer drones average 50–120W during typical recreational flight.
Reference: Common consumer drones
| Drone | Battery | Voltage | Avg Power | Official flight time |
|---|---|---|---|---|
| DJI Mini 3 Pro | 2453 mAh | 7.38 V | ~18 W | 34 min |
| DJI Air 3 | 4241 mAh | 11.55 V | ~35 W | 46 min |
| DJI Mavic 3 | 5000 mAh | 15.4 V | ~55 W | 46 min |
| DJI FPV | 2000 mAh | 22.2 V | ~105 W | 20 min |
| DJI Phantom 4 | 5870 mAh | 15.2 V | ~80 W | 28 min |
Tips to maximize flight time:
- Fly in calm, windless conditions
- Keep altitude low (less battery fighting wind gradients)
- Use smooth, gentle control inputs — avoid aggressive maneuvers
- Keep the battery warm before flying in cold weather (below 10°C reduces capacity significantly)
- Land when the battery reaches 20–25% charge remaining, not lower
Note on official vs real-world flight times: Manufacturer specifications are measured under ideal lab conditions with no wind and constant speed. Real-world flight time is typically 15–25% shorter. This calculator applies an 80% real-world efficiency factor to give a more realistic estimate.