Estimate the fair market value of a used car based on age, mileage, and condition.
Used car value depends on four core factors: age, mileage, condition, and market demand. These variables interact with each other — a 4-year-old car with 85,000 miles is very different from a 4-year-old car with 30,000 miles, even if everything else is identical. Understanding how each factor affects value helps you negotiate more effectively whether you're buying or selling.
The most accurate values come from checking multiple sources: Kelley Blue Book, Edmunds, and CarGurus all use real transaction data to estimate value. The spread between the lowest and highest estimates tells you the range you're working in. Our calculator provides a baseline estimate using standard depreciation models.
New cars lose 15–25% of their value in the first year alone — much of that the moment you drive off the lot. After the first year, depreciation slows to roughly 10–15% per year for most vehicles. A $35,000 car is typically worth around $21,000–$24,000 after 3 years and $15,000–$18,000 after 5 years under average driving conditions.
Mileage matters in relation to the vehicle's age. The US average is about 13,500–15,000 miles per year. A car with significantly more miles than average for its age will be worth less; a low-mileage example commands a premium. As a rough rule, each 10,000 miles above the age-adjusted average reduces value by $500–$1,500 depending on the vehicle's price range.
Condition is graded on a scale: Excellent, Good, Fair, and Poor. Most used cars honestly fall into "Good" condition — minor cosmetic wear, well-maintained mechanically. Excellent condition requires nearly flawless paint and interior with full service records. Fair and Poor conditions reflect deferred maintenance, significant cosmetic damage, or mechanical issues that need attention.
Moving from Good to Excellent condition can add 5–10% to a car's value. Moving from Good to Fair can reduce it by 15–20%. If you're selling, deep cleaning and minor detailing before listing is almost always worth the cost — a $200 detail can recover $500–$1,500 in perceived value.
Dealerships pay wholesale prices for trade-ins — typically 10–20% less than what the car would sell for at retail. They need that margin to recondition the vehicle, cover carrying costs, and make a profit on resale. Private sales typically return 10–15% more than dealer trade-ins because you're selling directly at retail without the middleman.
For a $15,000 car, the difference between trade-in and private sale can be $1,500–$3,000. The trade-off is convenience and time. Private sales require listing, showing, negotiating, and handling paperwork — and in some states, you may be liable if the buyer claims you misrepresented the vehicle.
A single accident on a vehicle's Carfax history can reduce its value by 10–25%, even if the repair was done perfectly. Insurance companies and savvy buyers discount accident-history vehicles because of uncertainty about hidden structural damage and the perception of higher risk. Minor fender-benders reported to insurance have less impact than airbag deployments or frame damage — the latter can reduce value by 30–50% regardless of how good the repair looks.
Always pull a Carfax or AutoCheck report before buying a used car. The $40–$50 cost is trivial compared to unknowingly paying full price for a car with a significant accident history.
Not all cars depreciate at the same rate. Toyota, Honda, and Subaru vehicles are known for strong resale values — a 3-year-old Toyota Tacoma or 4Runner holds 70–80% of its original MSRP in many markets. Luxury brands like BMW, Audi, and Mercedes depreciate much faster — often retaining only 40–50% of value after 3 years — due to higher maintenance costs, shorter warranty periods in the used market, and lower demand from budget-conscious used car buyers.
Electric vehicles currently show wide variance in depreciation. Teslas have shown better-than-average retention compared to other EVs, but non-Tesla EVs have depreciated significantly as the market has expanded and new models with better range have launched.
This calculator provides estimated used car values based on general depreciation models. Results are estimates only and do not reflect actual market conditions, regional pricing, vehicle history, or specific condition. Actual used car values should be verified through licensed appraisers, dealer quotes, or established services such as Kelley Blue Book or Edmunds. This tool is for informational and educational purposes only.