EV Weight Penalty Calculator

Calculate the energy consumption penalty from EV battery weight and its effect on range and efficiency.

Input Parameters

Results

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Total Vehicle Weight
lbs
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Weight Increase
%
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Actual Efficiency
Wh/mi
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Range Loss from Weight
miles
Note: EV batteries add 800-1,400 lbs to a vehicle. Each 10% weight increase costs ~3% efficiency. The relationship is partially offset by regen braking recovering energy during deceleration. Lighter batteries (higher energy density) directly improve range.

Reference

Weight Increase % = Battery Weight / Base Weight × 100 Efficiency Penalty = 1 + (Weight Increase % × 0.003) Actual Wh/mi = Base Wh/mi × Efficiency Penalty Ideal Range = Usable kWh × 1000 / Base Wh/mi Range Loss = Ideal Range − Actual Range