Battery Degradation Calculator
Compare current usable capacity with the original capacity, and calculate historical average loss.
Your results
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Review the example inputs, then calculate. We show the assumptions alongside your result.
Why is this an estimate?
Annual loss is a historical arithmetic average in percentage points per year, not a prediction of future degradation or a battery failure date.
Read our methodologyEVVerity estimates are informational and are not a substitute for a professional battery diagnostic or pre-purchase vehicle inspection.
See how the calculation works
Annual loss is a historical arithmetic average in percentage points per year, not a prediction of future degradation or a battery failure date.
Start with comparable information
Check the units, time period and vehicle configuration behind each number. Use battery-side driving consumption for capacity estimates. Energy billed by a charger also includes losses and may include thermal management.
Vehicle specifications describe a version when new. A user-supplied report describes a particular vehicle at a particular time. Our calculations keep those two kinds of information separate.
Methodology, assumptions & confidence →