EV Energy Needed Calculator

Energy to add to the battery to go from one state of charge to another, including charging losses.

Formula

Energy into the battery = Battery capacity (kWh) × (Target charge (%) − Starting charge (%)) / 100

Assumptions

Energy to add to the battery to go from one state of charge to another, including charging losses.

How to read it

The quoted capacity is often gross; usable capacity — what the gauge spans from 0 to 100% — is a little lower. To protect the battery, most manufacturers recommend staying between 20 and 80% for daily use.

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