Free Tesla Tools
Calculators and checkers for Tesla owners and used Tesla buyers. No sign-up, no paywall — just answers.
Ownership
Battery, warranty, maintenance, charging and total running costs — plus California registration and lemon law.
Battery Replacement Cost Estimator
Estimate what a Tesla battery pack costs to replace out of warranty, check whether your warranty should cover it, and see cheaper options.
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Battery Warranty Checker
Enter your Tesla, delivery date and mileage to see how much Battery and Drive Unit cover and basic warranty is left, when each expires, and what they pay for.
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Maintenance Cost Calculator
Build an itemized Tesla maintenance budget by model and mileage — tires, rotations, cabin filters, brake fluid and wiper blades, with yearly and 5-year totals.
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Cost of Ownership Calculator
Add up the true cost of owning a Tesla: depreciation, charging, insurance, maintenance, tires and registration, as a monthly figure and a total over your years.
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Supercharger Cost Calculator
Estimate what Supercharging costs per session, per mile and per month for your Tesla — with peak and off-peak California rates, home charging and gas compared.
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Home Charging Cost Calculator
Enter your electricity rate to see what charging your Tesla at home costs per charge, per mile and per month, and the gas price that would cost you the same.
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California Registration Fee Calculator
Itemized estimate of your California Tesla registration: VLF, Transportation Improvement Fee, the $121 EV Road Improvement Fee, CHP and DMV fees.
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California Lemon Law Checker
Answer seven questions to see whether your Tesla meets California's lemon law presumption (18 months / 18,000 miles) and what to do next.
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Buying & selling
Used Tesla checks, trade-in value, depreciation and lease vs buy.
Used Tesla Buying Checklist
A 20-point checklist for buying a used Tesla: title and history, FSD and hardware, battery health, body and tires, and the test drive. Save progress and print it.
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Trade-In Value Calculator
Estimate what Tesla or a dealer will offer for your car. Enter the model, year, mileage and condition to see a trade-in range and likely private-sale value.
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Lease vs Buy Calculator
Compare leasing and buying the same Tesla over your term — monthly payment, total cash out, equity left at the end, and which one costs less for your mileage.
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Depreciation Calculator
See what a Tesla is worth after 1 to 10 years. Enter the model, price and age for a projected resale value, yearly loss and how it compares with rivals.
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Insurance
Estimate premiums and see whether Lemonade's FSD discount works for you.
Tesla Insurance Cost Estimator
Estimate monthly insurance for a Model 3, Model Y, Model S or Model X in your state and compare Tesla Insurance, Lemonade, State Farm and GEICO.
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Lemonade vs Tesla Insurance Calculator
Compare Lemonade and Tesla Insurance side by side for your Tesla, state and driving record, with the FSD safe-driving discount and yearly savings included.
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Is Lemonade Right for Me? Quiz
A one-minute quiz that checks your state, hardware and driving habits to tell you whether Lemonade Car is worth a quote for your Tesla.
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FSD
Check transfer rules, hardware and whether the FSD subscription is worth it.
FSD Transfer Checker
Find out in seconds whether Full Self-Driving transfers with a used Tesla. Answer three questions about the car and how FSD was paid for to get a clear verdict.
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FSD Buy vs Subscribe Calculator
Compare the total cost of the $99/month FSD subscription with the old one-time purchase price over the years you plan to own the car.
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Hardware Version Checker
Find out whether a Tesla has HW3 or HW4 from its model and build year, how to confirm it on the car, and what it means for FSD and insurance discounts.
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