Tesla Battery Health Calculator
Instantly estimate your Tesla's remaining battery capacity using real figures from the Energy app — no diagnostics or third-party apps required.
100%
Free
All
Tesla models
8yr
Warranty check
Battery degradation curves
Fleet average capacity retention by model
Want to check your Tesla's warranty?
See exactly how many months and miles remain on your battery & drive unit warranty.
How healthy is your Tesla battery?
Better than average for the age and mileage. No action needed.
Normal, healthy degradation. The vast majority of Teslas in regular use sit in this range.
Typical for higher-mileage or older vehicles. Worth monitoring; no cause for concern.
Above-average degradation. Review your charging habits and check whether a warranty claim applies.
Tesla's warranty guarantees 70% retention. If you're under this threshold within the warranty period, contact Tesla Service.
Results are estimates based on in-car display data. For a definitive measurement, request a battery diagnostic from Tesla Service.
What does normal Tesla battery degradation look like?
0 – 25,000 mi
~3–5%
A small 'settling' drop soon after purchase. Normal and expected.
25,000 – 100,000 mi
~5–10%
Degradation slows significantly. Most owners see very little month-to-month change.
100,000 – 200,000 mi
~10–15%
A long, gentle plateau. Tesla's fleet data puts the average at ~85–90% retention at this point.
The biggest factor is how you charge. Frequent DC fast charging (Supercharger), storing at 100% for days at a time, and extreme heat all speed up the process. Keeping daily charge limits at 80–90% and using AC charging as your primary source makes a measurable difference over time.
For a full breakdown, see our guide to maximising Tesla battery life.
Tesla battery warranty — what's covered?
Every Tesla comes with a battery warranty that guarantees a minimum of 70% capacity retention. If your battery falls below this within the period, Tesla will repair or replace it. Use our warranty checker to see exactly where you stand.
| Model | Trim | Duration | Mileage limit | Min. retention |
|---|---|---|---|---|
| Model 3 | Standard Range / RWD | 8 years | 100,000 mi | 70% |
| Model 3 | Long Range / Performance | 8 years | 120,000 mi | 70% |
| Model Y | All trims | 8 years | 120,000 mi | 70% |
| Model S | All trims | 8 years | 150,000 mi | 70% |
| Model X | All trims | 8 years | 150,000 mi | 70% |
| Cybertruck | All trims | 8 years | 150,000 mi | 70% |
Whichever limit comes first — years or miles. Warranty is transferable to subsequent owners. US figures; regional terms may vary.
Five habits that slow battery degradation
Charge to 80–90% daily
Tesla recommends 80% for everyday use. The lower your regular top-of-charge, the less stress on the cells over thousands of cycles.
Limit Supercharger use
DC fast charging is convenient but generates more heat inside the cells. Reserve it for road trips rather than routine top-ups.
Avoid storing at 100%
If the car sits unused for days, set the charge limit to 50–70%. High-SOC storage is one of the main drivers of long-term capacity loss.
Don't drain below 10% regularly
Occasional deep discharges are fine. Doing it habitually adds cumulative stress — the last 10% is harder on the chemistry.
Park in the shade in hot climates
Heat is the number-one accelerant of battery ageing. Passive cooling between drives helps more than most owners realise.
How this battery health calculator works
Enter three figures from your Tesla's Energy screen — the calculator does the rest.
① Energy consumption
Wh/mi or Wh/km
Your average energy use per mile or km, shown on the Energy screen. Use the 30-mile average for the most stable reading.
② Projected range
Miles or km
The range Tesla projects based on your recent driving. Found next to the consumption figure on the same screen.
③ Battery percentage
% state of charge
Your current battery level shown in the top-right corner of the Tesla screen. Take a reading above 50% for better accuracy.
What is Tesla battery degradation?
Battery degradation is the gradual reduction in a battery's ability to hold a full charge. It happens to every lithium-ion battery — the result is that an older Tesla will show a lower projected range at 100% than it did when new.
The good news: Tesla's fleet data shows batteries retain around 90% of their original capacity after 200,000 miles. Most owners never notice a meaningful impact on day-to-day driving.
What matters is the pattern. A small early drop followed by a long, slow plateau is completely normal. Continued rapid decline after the first year, or a sudden large loss, is worth investigating.
Tesla battery specs & facts
Full capacity tables by model and year, cell chemistry, and key degradation stats
Frequently Asked Questions
How does the Tesla battery health calculator work?
Enter the Wh/mi or Wh/km figure from your Tesla's Energy app, the projected range shown at your current charge level, and the battery percentage. The calculator derives your current usable capacity and — if you select your model — compares it to the factory spec.
Where do I find Wh/mi or Wh/km on my Tesla?
Open the Energy app on your Tesla's touchscreen. Select a 30-mile or 50 km window. The average consumption figure (shown in the middle-left of the screen) is the Wh/mi or Wh/km value you need.
What is a healthy battery capacity percentage?
90% or above is excellent and typical for newer vehicles. 80–90% is normal for vehicles with moderate mileage. Below 80% may indicate above-average degradation; Tesla's warranty covers batteries down to 70% capacity within the warranty period.
Does this tool check Tesla warranty by VIN?
Our calculator works without a VIN — just select your model, year, and variant to look up the factory capacity. For warranty status, use our Warranty Checker, which decodes your VIN and calculates remaining time and mileage.
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