You can calculate your interest costs using the formula I P X R X T where. N Total of. To accomplish this divide your APR by 12 the number of months in a year.
C Monthly Payment.
Free payment calculator to find monthly payment amount or time period to pay off a loan using a fixed term or a fixed payment. The second calculator helps you figure out what vehicle price you can afford for a given monthly loan payment. Free payment calculator to find monthly payment amount or time period to pay off a loan using a fixed term or a fixed payment. R Monthly Interest Rate in Decimal Form Yearly Interest Rate100 12.