RC Battery Runtime Calculator

Estimate run time and check whether your pack can supply the current. Example values are a 2S drift pack.

Pack

Current draw

Don't know your draw?

Run a timed pack, then check how many mAh your charger puts back. That gives your real average draw, which replaces the value above.

Results

0min estimated runtime
Average draw used
Nominal voltage
Energy
Usable capacity
Max continuous (C × Ah)
Peak headroom

Stop around 80% used (about 3.7–3.75 V per cell resting) for LiPo life. Manufacturer C ratings are usually optimistic, so leave margin.

Built for the track

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