Battery Degradation
Estimate EV battery capacity loss and range over years of use.
About Battery Degradation
Batteries fade roughly linearly over the first years, so multiplying the annual degradation by ownership years gives the remaining capacity, which scales the range directly. Capacity loss reduces both driving range and resale value, so knowing the trajectory helps buyers budget for replacement or trade-in timing.
Formula
Battery Degradation
Capacity % = 100 - years x annual degradation%
- annual degradation
- Percentage capacity lost per year of typical use
Worked example
With the default values below, Battery Degradation returns Capacity Remaining of 90.00%. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Initial rangeminimum 1 mi
- 250 mi
- Annual degradationaccepts 0–10 %
- 2 %
- Years ownedminimum 0
- 5
- Charge cycles per yearminimum 0
- 150
Results
- Capacity Remaining
- 90.00%
- Range After Years
- 225 mi
- Range Lost
- 25 mi
Step by step
- 1Values used
- 2Battery Degradation
- 3Capacity Remaining= 90.00
- 4Range After Years= 225 mi
- 5Range Lost= 25 mi
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation or tax into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Battery Degradation calculated?
Capacity % = 100 - years x annual degradation% Batteries fade roughly linearly over the first years, so multiplying the annual degradation by ownership years gives the remaining capacity, which scales the range directly.
Why does Battery Degradation matter?
Capacity loss reduces both driving range and resale value, so knowing the trajectory helps buyers budget for replacement or trade-in timing.
What values do I need to enter?
This calculator takes 4 inputs: Initial range, Annual degradation, Years owned, Charge cycles per year. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.