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How to calculate car insurance quote
First you should understand the basics of how insurance companies make money: In a simple scenario, assume 1,000 have car insurance. Assume that on average, 100 people have accidents per year, and that each accident costs $10,000. So, we can expect total costs to be $1,000,000 per year. Some of those costs will be paid by the drivers, who have some sort of 'deductible'. That is - the insurance company will only cover costs after the driver has themself paid some initial amount [something like, the first $1,000 of repairs is paid by the driver]. So now the insurance company expects to have to pay out $900,000 in total claims this year. If they want to pay those claims (and also pay their administrative costs, and earn a profit), they might want to have $1,250,000 in revenue. Across 1,000 people, that would be $1,250 / year in insurance premiums. Of course, the big question for the insurance company is: how much will they really need to pay out in insurance claims each year? The better they can predict that number, the more profitable they can be [because they can charge a much more accurate amount, which can earn them new customers and gives them insurance {pun} that each new customer is actually profitable to them on average]. So the insurance company spends a lot of time and money trying to predict your likelihood of a car accident. They use a lot of metrics to do this. Some might be statistical hogwash that they charge you because they feel they can [if every insurance company charges you extra for driving a 2-door instead of a 4-door, then they all will], and some might be based in reality. So they attempt to correlate all of the items in your list, to see if any of those items indicates that you should be charged more (or less) for your insurance. This is equal parts art and science, and a lot of it comes down to how they market themselves. ie: if an insurance company gives a discount for being in college, is that because college drivers are better drivers, or is it because they want to increase the number of young customers they have, so they can keep those customers for life? Therefore how each metric factors into your calculation will be based on the company using it. It would basically be impossible to 'come up with' the same answer as the insurance company by having the information you provided, because of how heavily dependant that answer is on statistics + marketing. As for how your state matters - some states may have different accident rates, and different payout systems. For example - is Hawaii driving more dangerous because of all the tourists driving rented cars faster than they should? Is New York less expensive to insure because better public health care means less cost is borne by the insurance company in the event of an accident [I have no idea if either of these things are the case, they are purely for hypothetical discussion purposes].  In short, make sure you get quotes from multiple providers, and understand that it isn't just the cost that changes. Check changes in coverage and deductibles as well [ie: if one company charges you $100 / month when everyone else charges $200 / month - make sure that the cheaper company doesn't limit its coverage in ways that matter to you].