RC Battery Runtime Calculator
Estimate how long your LiPo will last by class and driving style — based on typical pit-stop benchmarks.
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Printed on the battery label. Common: 3500, 5000, 5800, 6500.
Estimated runtime
7.5–10.0minutes
Based on typical 30–40 A average current draw for this class at race pace.
Actual runtime depends on gearing, motor wind, weight, surface, and outside temperature. Treat this as a planning estimate — don't run your battery flat for the sake of "more time." LiPos hate full discharge.
How this estimate is calculated
- • Runtime (minutes) = capacity (mAh) ÷ 1000 ÷ average current (A) × 60.
- • The current ranges come from typical pit-stop observations for each class — race pace draws more than practice; bashing draws less than racing.
- • For race classes that don't appear here (e.g. specific stock/modified categories), pick the closest match.
- • Drag racing is its own beast — pulls 100+ amps for short bursts. Runtime estimates assume continuous run.
- • A safe rule: target 60–70% of estimated runtime so you finish with reserve. LiPo battery life degrades fast at low voltage.
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Free app
Track real runtime — and 6 more racing calculators — on your phone
Pit Calc Pro for iOS & Android.
