How accurate is the flight time estimate?

It is a planning estimate. Real flight time varies with wind, temperature, prop efficiency, aggressive maneuvers, and battery age. Use it as a baseline and validate with real logs.

Why do you use only part of the battery capacity?

Most pilots keep a safety reserve to avoid deep discharges. This calculator applies a usable-capacity percentage so the estimate is closer to real-world practice.

What is “average current draw”?

It is the typical current your drone pulls during the type of flight you care about (hover, cruise, mixed). You can approximate it from flight logs or an inline wattmeter.

Drone Flight Time Calculator – Estimate Drone Battery Life

Calculate your drone’s maximum flight time instantly with our free drone flight time calculator. Whether you’re planning aerial photography, surveying projects, or recreational flights, knowing your exact flight duration is crucial for mission success and battery safety.

Our calculator uses precise formulas accounting for battery capacity (mAh), voltage, total weight, and average current draw to deliver accurate flight time estimates. Simply input your drone specifications to get instant results in minutes, helping you plan battery rotations and avoid mid-air power failures.

Drone Flight Time Calculator

Estimate runtime from battery capacity, voltage, and average current draw. Default usable capacity: 80%.

Model presets (optional)

These are best-guess templates to prefill values. Always verify with your drone specs or flight logs.

Battery capacity (mAh)

Tip: use the value printed on your battery label.

Battery voltage (V)

Examples: 3S ≈ 11.1V, 4S ≈ 14.8V, 6S ≈ 22.2V (nominal).

Average current draw (A)

Use hover / cruise average from logs for best accuracy.

Usable battery (%)

Keeps a reserve to avoid deep discharge.

Estimated flight time

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Usable capacity: —

Estimated energy: —

Enter values to see results.

FAQ

Accuracy: This is a planning estimate—wind, temperature, props, payload and battery age can change runtime.

Reserve: Using ~80% usable capacity is common to avoid deep discharges.

Safety note: always land with a reserve and follow your battery manufacturer guidelines.

Perfect for hobbyists, professional pilots, and drone enthusiasts, this tool eliminates guesswork from flight planning. Get reliable predictions before takeoff, optimize your drone’s payload weight, and maximize every flight session with confidence.

Planning longer flights? Use our Drone Battery Charging Time Calculator to see how fast your batteries recharge, or check your drone’s lifting limits with our Drone Payload Calculator.