EV Battery Health Estimator
Turn your range and consumption into an estimated usable-capacity band. See what the numbers can—and cannot—tell you.
Your results
Transparent by designA clearer picture starts here.
Review the example inputs, then calculate. We show the assumptions alongside your result.
Why is this an estimate?
Age, mileage and charging habits provide context. They are not enough to establish the condition of an individual battery.
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
Age, mileage and charging habits provide context. They are not enough to establish the condition of an individual battery.
Example: infer usable energy, then test the assumptions
With a 320 km full-charge range estimate and matching consumption of 16.5 kWh/100 km, inferred usable energy is 52.8 kWh. A chosen ±10% input sensitivity gives approximately 47.5–58.1 kWh. Compared with an original usable 60 kWh, this corresponds to about 3.2–20.8% degradation. These are example inputs, not a measured vehicle result.
Where to get useful inputs
- Find the original usable (net) capacity in documentation for the exact battery version. A gross pack figure is a different denominator.
- Use the car’s recent driving-consumption display. Record the averaging period and conditions; do not use a charger bill.
- Enter a matching full-charge range estimate. Mixing a city-based range prediction with motorway consumption can invalidate the inference.
- Keep the report date, method and vehicle details with any BMS SoH value. An evidence-confidence label does not authenticate the report.
Is this a battery health test?
No. It is a transparent estimate based on inputs you provide. The sensitivity band is chosen by you, not a statistically calibrated confidence interval. Age and mileage alone do not produce a health percentage.
Which battery evidence do you have?
Choose the closest description for a useful next step. This does not diagnose the car.
I have a diagnostic report
Check the vehicle match, date, method and capacity reference. Enter any reported BMS SoH separately. If the report contains a different kind of derived health score, keep its original label and ask the provider how to interpret it.
Read the report checklist →The vehicle offers an onboard health test
Use the current owner’s manual for the exact vehicle. Confirm availability, preparation and duration with the seller. A test may not be practical during a short viewing; do not improvise a full discharge or change service settings.
Compare the test methods →I only have range and consumption
Use figures from matching conditions for an initial usable-energy estimate. Confirm the original usable baseline before calculating degradation. This does not measure SoH or establish whether a warranty claim qualifies.
Estimate with a visible sensitivity band →I do not have usable battery evidence yet
Age, mileage and VIN do not establish actual battery health. Request a recent report or discuss a suitable test with a qualified provider. Ask about supported vehicles, measurement method, scope and the final price.
See UK test-price examples and booking questions →