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Flight time calculator

Enter the battery capacity and the average current your model draws. No current figure? Enter cells and average power instead.

Average over a flight, not full throttle - from ESC telemetry or a wattmeter. Gentle flying is often a third to half of full-throttle current.
Landing with 20% left (80% used) keeps LiPos healthy.
Only if you left the current empty.

Result

Fill in the numbers above to see the result.

How it works

Flight time in minutes = capacity used (Ah) ÷ average current (A) × 60. With 80% used, a 2200 mAh pack at 18 A gives 1.76 ÷ 18 × 60 = 5.9 minutes.

If you only know power, current = watts ÷ (cells × 3.7 V).

The timer suggestion rounds down to the nearest 30 seconds. Check the pack's resting voltage after a few flights (about 3.8 V a cell means roughly 20% left) and adjust.

Keep every model's numbers in one place RC Flyer Pro is a free logbook and hangar for RC pilots: your models, batteries, flights and flying field, with GPS flight replays in 3D. Start free

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