How to Use the Battery Cycle Life Calculator
Enter your battery's rated cycle life (check its spec sheet), how often you fully recharge it, and how many years you've owned it — the calculator estimates your battery's current remaining capacity and roughly how many years of useful life remain before reaching the rated 80% threshold.
The tool is built around a simple, transparent approximation rather than a black-box estimate, so it's worth understanding what it does and doesn't account for.
Finding your battery's actual rated cycle life
As covered in the how-long-do-they-last guide, check your specific model's spec sheet for its stated cycle-life rating rather than assuming the general 2,500-4,000 cycle range applies exactly to your unit.
Understanding what the estimate does and doesn't capture
As covered in the 80%-threshold guide, this estimate uses a simple straight-line approximation and doesn't model factors like heat exposure or long-term storage habits that can accelerate real-world wear beyond the estimate — treat it as a reasonable planning figure, not an exact prediction.