This is an estimate, not a diagnosis. EV battery degradation is influenced by chemistry, climate, charging habits, and manufacturer-specific thermal management — factors this calculator can’t measure directly. What it does provide is a rough, industry-average-based estimate of how much capacity your battery may have lost over time, based on vehicle age and typical usage patterns.
Enter your battery’s original capacity, vehicle age, typical usage pattern, and an assumed annual degradation rate (2.3% is a commonly cited industry average, though your actual rate may differ). For an accurate reading of your specific vehicle’s battery health, check your manufacturer’s app or request a certified battery diagnostic.
FAQ
How much does an EV battery degrade over time?
Industry studies commonly cite an average of around 2–3% capacity loss per year, though this varies significantly by battery chemistry, climate, and charging habits. Most modern EV batteries are designed to retain 70–80% of capacity even after 8–10 years or more.
Does fast charging damage EV batteries faster?
Frequent DC fast charging can contribute to slightly faster degradation compared to standard AC charging, primarily due to heat generation, though modern battery management systems are designed to mitigate this effect.
Can I check my actual battery health instead of estimating it?
Yes — most EV manufacturers provide a battery health percentage through the vehicle’s infotainment system or companion app. This is far more accurate than any general calculator, since it reflects your specific vehicle’s actual usage history.
Why does climate affect battery degradation?
Extreme heat accelerates chemical aging in lithium-ion batteries, while extreme cold temporarily reduces usable capacity (though this isn’t permanent degradation). Vehicles in consistently hot climates tend to show faster long-term capacity loss.
