Estimate how your EV battery degrades over time. Project range loss and remaining capacity at any year or mileage.
EV batteries gradually lose capacity over time, reducing maximum range. Most owners see about 2–3% degradation per year, reaching 80–90% of original capacity after 8–10 years. The rate depends on charging habits, climate, driving patterns, and battery chemistry.
This calculator projects your EV battery's health over time based on your usage patterns. Fast charging, extreme temperatures, and keeping the battery at very high or very low states of charge all accelerate degradation.
Understanding battery degradation helps with long-term ownership planning, resale value estimation, and deciding when battery replacement might be needed.
Whether you drive a compact sedan, a full-size SUV, or a pickup truck, accurate ev battery degradation figures help you plan smarter and avoid costly surprises at the pump or dealership. Use this tool regularly to track changes over time and adjust your transportation budget accordingly.
From daily commuters to long-distance road-trippers, knowing your precise ev battery degradation numbers empowers you to negotiate better deals, compare vehicles objectively, and optimize every dollar spent on transportation. Adjust the inputs above to match your unique driving profile and see how small changes create meaningful savings over months and years.
From daily commuters to long-distance road-trippers, knowing your precise ev battery degradation numbers empowers you to negotiate better deals, compare vehicles objectively, and optimize every dollar spent on transportation. Adjust the inputs above to match your unique driving profile and see how small changes create meaningful savings over months and years.
Battery degradation directly affects an EV's range and resale value. This calculator helps current and prospective owners understand what to expect over 5, 10, or 15 years of ownership, turning battery anxiety into informed planning. Results update instantly as you adjust inputs, making it easy to explore different scenarios and find the best option for your driving needs and budget.
Battery Health = 100% − (Annual Degradation Rate × Years) Typical Rate: 2–3%/year (linear approximation for first 10 years) Remaining Range = EPA Range × Battery Health %
Result: 87.5% health, 263 miles EPA range
After 5 years at 2.5%/year: 100% − 12.5% = 87.5% health. Remaining EPA range: 300 × 0.875 = 263 miles. Usable capacity: 75 × 0.875 = 65.6 kWh.
NCA (Tesla Long Range): ~2.5%/year typical. NMC (most non-Tesla EVs): ~2.5–3%/year. LFP (Tesla Standard Range, BYD): ~1.5–2%/year. Solid-state (future): projected <1%/year. Chemistry is evolving rapidly toward better longevity.
Heat: +0.5–1%/year in hot climates. DC fast charging (daily): +0.5–1%/year. High mileage (>20,000/year): +0.5%/year. Charged to 100% daily (NMC): +0.3–0.5%/year. Deep discharges (<5%): +0.2–0.5%/year.
Tesla fleet data shows average degradation of 12% at 200,000 miles (about 10–13 years). Hyundai Kona EV shows about 2% per year. Nissan Leaf (no active cooling) degrades faster at 4–5% per year in hot climates.
A 20% range loss (300 to 240 miles) typically reduces resale value by $2,000–$5,000. However, the reduced range is still adequate for most daily driving. Battery replacement economics only make sense for vehicles with more than a 30–40% loss.
Most EVs lose 2–3% capacity per year in temperate climates with normal use. High-mileage drivers may see slightly faster degradation. Early loss is slightly faster (3–5% in year 1), then stabilizes to 1.5–2.5% per year.
Frequent DC fast charging (daily) can accelerate degradation by 0.5–1% per year. Occasional DCFC (weekly or less) has minimal impact. Modern battery management systems limit charging speed to reduce heat and stress.
Yes, sustained heat (95°F+) is the biggest accelerator. EVs in Phoenix or Las Vegas may see 3–4% annual degradation vs. 2% in mild climates. Active thermal management (liquid cooling) helps, but can't fully compensate for extreme heat.
Most owners never need to replace. At 80% health (typically 8–12 years), the car still has 200–240 miles of range (from 300). Battery replacement costs $5,000–$15,000. It makes economic sense only if the car is otherwise in excellent condition.
Federal law requires 8-year / 100,000-mile EV battery warranty. Many manufacturers guarantee minimum 70% capacity. Tesla: 8 years/100,000–150,000 miles. Hyundai: 10 years/100,000 miles. Check your specific vehicle's warranty terms.
LFP (Lithium Iron Phosphate) batteries degrade 20–30% slower than NMC batteries and tolerate 100% charging with less stress. They have lower energy density but longer lifespan. Tesla Standard Range models and some Chinese EVs use LFP.