Regenerative Braking Energy Calculator

Calculate energy recovered through regenerative braking from speed, vehicle mass, and regen efficiency.

Input Parameters

Results

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Kinetic Energy Available
Wh
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Energy Recovered
Wh
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Energy Lost as Heat
Wh
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Range Recovered
miles
Note: Regen efficiency typically ranges 60-80% depending on motor type, power electronics, and braking intensity. Most energy is recovered in moderate braking. Emergency/hard braking still uses friction brakes.

Reference

KE = ½ × m × (V₁² − V₂²) KE (Wh) = KE (Joules) / 3600 Energy Recovered = KE × Regen Efficiency Heat Loss = KE − Recovered Energy Range Recovered = Recovered Wh / Wh_per_mile