Generally, there are two ways to figure out the total interest on a car loan
: using an online loan calculator or doing some old-fashioned math. Whichever route you choose, you will need the following information:
Your principal loan amount (represented by P in the formula below)
The interest rate on your loan—not to be confused with the APR
(represented by r) The overall length of your loan (represented by t)
To use an online loan calculator, you’ll just plug in these values and click calculate. You can find calculators on websites like Carvana and Edmunds. Bonus: they’re free to use!
If you’re doing the math yourself, the formula will look like: A = P(1 + rt). You’ll take the principal loan amount times the result of one plus your interest rate times your loan length.
Confused? Me too! That’s why I’d opt for the online calculator all day.
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MORE: Does refinancing a car hurt your credit score?