How do you figure auto loan payment?

First get the Total cost (Price +PDI +all Taxes say $15,000) Get the interest rate (say 5%) What is the term (say 3 years 36 months) So the calculation is as follows 5% interest is .05 Add it to one and multiply it by itself times the number of years (3 in this example) (1+.05) * (1+.05) * (1.05) * 15,000 / 36 so you get 1.1576 * 15000=17364.38 (actual cost of auto) /36 =482.34/month