Finding your car's value starts with three free online tools: Kelley Blue Book, NADA Guides, and Edmunds

You can find what your car is worth in about 15 minutes using free websites that pull data from actual sales. The three most widely used are Kelley Blue Book (kbb.com), NADA Guides (nadaguides.com), and Edmunds (edmunds.com). Each one asks you the same basic questions — year, make, model, mileage, and condition — and shows you a range rather than a single number. The range exists because a car's value depends on where you sell it, who you sell it to, and small differences in wear that are hard to measure online.

You will get three different values from these sites, and that is normal. They use different data sources and update at different times. The real value of your car sits somewhere in the middle of all three ranges. If you are selling to a dealer, expect to receive less than the "trade-in" value these sites show. If you are selling privately to another person, you can ask closer to the "private party" value.

Key Takeaways

  • Kelley Blue Book, NADA Guides, and Edmunds are free and show you a range based on your car's year, make, model, mileage, and condition.
  • The three sites often show different values because they use different sales data, so check all three and look for the overlap.
  • Dealer trade-in value is always lower than private party value, and both are lower than what a dealer charges a buyer.
  • Your car's condition — whether the engine runs smoothly, the interior is clean, and the paint is intact — affects the final value more than mileage alone.
  • Recent repairs, accident history, and service records can raise or lower the value, so gather these details before you get your estimate.

What information you need before you start

Gather these details before you open any valuation website. You will need your car's year, make, model, and trim level — all of which appear on your registration or title. You will also need the current mileage on your odometer. If you do not know your trim level (for example, whether you have a Honda Civic LX or EX), check your registration or look at the badge on the back of your car.

Have your service records handy if you have them. Major repairs — a new transmission, a replaced engine, new brakes, or a new roof — can change the value by hundreds of dollars. The same goes for accident history. If your car has been in an accident, even a minor one that was repaired, the sites will ask about it, and you should answer honestly. A car with a clean history is worth more than an identical car that has been in a wreck.

How condition ratings work and why they matter

All three sites ask you to rate your car's condition on a scale. Kelley Blue Book uses "Excellent," "Good," "Fair," and "Poor." NADA uses numbers from 1 to 5. Edmunds uses similar categories. These ratings are not about whether your car is clean — they are about whether it runs, whether the major systems work, and whether the body and interior show normal wear or serious damage.

"Excellent" or "5" means the car looks and runs like it just came off the lot. "Good" or "4" means it runs well and looks presentable, but has minor cosmetic wear — a small dent, worn seat fabric, or faded paint. "Fair" or "3" means it runs but has visible wear inside and out — dents, stains, worn tires, or a check-engine light. "Poor" or "1 or 2" means it has major mechanical problems or serious body damage. Most used cars fall into the "Good" or "Fair" range.

The condition rating can swing your car's value by $2,000 or more. If you rate your car as "Excellent" when it actually has a dent in the door and worn tires, your estimate will be too high. Be honest about what you see when you look at your car, because the person buying it will notice the same things.

Understanding trade-in value versus private party value

The websites show you two prices: trade-in value and private party value. Trade-in value is what a dealer will give you if you trade your car in toward a new one. Private party value is what you can expect if you sell the car yourself to another person. Private party value is always higher — sometimes by $1,000 or more — because the dealer needs to make money when they resell the car.

There is also a third number that the sites do not always show clearly: the dealer retail value, which is what a dealer charges a buyer for the same car. That number is higher than both trade-in and private party value. You will see this price on dealer websites and in classified ads when dealers are selling used cars.

If you are trading your car in, use the trade-in value as your starting point for negotiation. If you are selling privately, use the private party value. If you are buying a used car from a dealer, expect to pay closer to the dealer retail value, and use the private party value to know whether the dealer's price is reasonable.

How mileage affects value and when it stops mattering as much

Mileage is one of the first things the valuation sites ask for, and it matters — a car with 50,000 miles is worth more than the same car with 100,000 miles. But mileage is not the only thing that matters. A well-maintained car with 150,000 miles can be worth more than a neglected car with 80,000 miles, especially if the high-mileage car has service records showing regular oil changes and repairs.

The relationship between mileage and value is not linear. The first 50,000 miles drop the value more sharply than the next 50,000 miles. Once a car passes 100,000 miles, each additional 10,000 miles has less impact on the value than it did when the car was newer. A car with 200,000 miles loses value more slowly per mile than a car with 50,000 miles.

If your car has higher mileage than average for its year, the valuation sites will show a lower value. You can offset this by highlighting maintenance records, recent repairs, or a clean accident history. These details do not change the online estimate, but they matter when you are negotiating with a buyer or dealer.

Getting a more accurate estimate with a pre-purchase inspection

The online estimates are a starting point, not a final answer. If you want to know your car's value more precisely — especially if you are selling it — consider paying for a pre-purchase inspection. A mechanic will spend 30 to 60 minutes checking the engine, transmission, brakes, suspension, and electrical systems. The inspection usually costs $100 to $200 and produces a written report of any problems found.

This report is valuable in two ways. First, it tells you whether your car has hidden problems that would lower its value. Second, it gives you something to show a buyer or dealer, which builds confidence and can help you negotiate a better price. A car with a clean inspection report is worth more than the same car without one, because the buyer knows exactly what they are getting.

You do not need an inspection to get an online estimate, but if you are selling a car worth more than $5,000 or if you are buying one, the inspection pays for itself by preventing surprises.

Checking local market prices to see if your estimate is realistic

The online valuation sites use national data, but your car's actual value depends partly on your local market. A truck is worth more in a rural area than in a city where most people use public transit. A convertible is worth more in a warm climate than in a cold one. A four-wheel-drive vehicle is worth more in a snowy region.

After you get your estimates from Kelley Blue Book, NADA, and Edmunds, spend 15 minutes looking at classified ads in your area — Craigslist, Facebook Marketplace, Autotrader, or Cars.com. Search for your exact year, make, and model with similar mileage and condition. Look at what sellers are asking and what similar cars have sold for recently. If most cars like yours are listed at $15,000 but the valuation sites say $17,000, your local market is softer than the national average, and you should adjust your expectations downward.

Frequently Asked Questions

Do I need to pay for a more detailed valuation?

No. Kelley Blue Book, NADA Guides, and Edmunds are free and give you the same information that paid services use. Some dealers offer free in-person appraisals, but these are sales tools — the dealer is trying to get you to trade your car in. The online tools are more objective because they have no stake in the transaction.

What if the three websites show very different values?

This is common and normal. Each site uses different sales data and updates at different times. Look at the ranges they show and find the overlap — that middle ground is closest to your car's real value. If one site is far outside the range of the other two, double-check that you entered the same information (year, mileage, condition) on all three.

Does the color of my car affect its value?

Yes, but the online tools do not always ask about it. Popular colors like white, black, and silver hold value better than unusual colors. If your car is an uncommon color, you might see a slightly lower value when you sell it privately, though dealers factor this in less than individual buyers do.

How often should I check my car's value?

If you are thinking about selling, check once and then again a few weeks before you list it. Values change slowly for most cars — a few hundred dollars per month — so checking weekly will not give you useful information. If you are buying, check the value of the specific car you are interested in, not just the model, because individual cars vary based on mileage and condition.

Can I use these estimates to negotiate with a dealer?

Yes. Print out the private party value from at least two of the sites and bring it with you. Dealers know these sites exist and expect buyers to have done this research. The estimate gives you a reasonable starting point for negotiation, though the dealer may offer less if they find mechanical problems during their inspection.