We don't mess around when it comes to figuring out what your car is worth. Car and Driver utilizes data from our sister company, Black Book, an auto industry leader in vehicle-value data analysis for car dealers. Black Book's extensive database enables us to calculate what your vehicle is worth based on its age, mileage, condition, options, and accident history—and also adjusts for the going price of similar vehicles in your area. Our calculator will tell you two things: what you can expect to be paid for your vehicle if you sell it privately and what you should get if you trade it in at the dealership.