Drone Flight Time Calculator

How Drone Flight Time Is Estimated

Quadcopter flight time depends on battery capacity, safe discharge limit, average current draw, and total aircraft weight. Hovering uses less power than aggressive maneuvers or flying in wind.

Drone Flight Time Formulas

$$\text{Average amp draw (A)} = \frac{\text{AUW (kg)} \times P \text{ (W/kg)}}{V \text{ (V)}}$$ $$\text{Flight time (hours)} = \frac{\text{capacity (Ah)} \times \text{discharge fraction}}{A}$$

LiPo batteries should not be fully depleted. A typical safe discharge limit is 80%. For battery sizing, use the Battery Size Calculator.

Frequently Asked Questions

Why only use 80% of battery capacity?

Deep discharging LiPo cells damages them and raises fire risk. Most pilots land with about 20% charge remaining to extend battery life and stay safe.

What is all-up weight (AUW)?

AUW is total flying weight including frame, motors, battery, camera, and payload. Heavier drones need more current to hover, which shortens flight time.

What is a typical W/kg value?

170 W/kg is a conservative hover estimate for many consumer quadcopters. Efficient builds may use around 120 W/kg, while older or heavily loaded rigs can need more.

Why is real flight time shorter than hover estimate?

Wind, acceleration, climbing, and camera gimbal movement increase current draw. Racing or FPV flying can cut effective flight time to 25-30% of a hover estimate.

How do I extend drone flight time?

Reduce weight, use a higher-capacity battery within motor limits, fly in calm conditions, and avoid constant throttle changes. Larger propellers with efficient motors also help on some builds.

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How Drone Flight Time Is Estimated

Drone Flight Time Formulas

Frequently Asked Questions

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