Your monthly loan payment depends on three main things: the amount borrowed, the APR, and the number of monthly payments. Change any one of those, and the payment changes.
APR is annual, but payments are monthly
To estimate a monthly payment, convert the APR into a monthly rate by dividing by 12. That monthly rate gets applied to the outstanding balance inside the standard amortization formula.
A 6% APR becomes 0.5% per month. On a $10,000 loan, that monthly rate is what drives the payment formula.
Why longer terms can feel easier but cost more
A longer term spreads the balance across more payments, so the monthly number comes down. But the tradeoff is that interest keeps accumulating for more months. Lower payment often means higher total cost.
What total paid tells you
Monthly payment answers affordability. Total paid answers cost. Looking at only the monthly payment can make an expensive loan feel cheaper than it really is.
When a zero-interest estimate behaves differently
If APR is 0%, the math becomes much simpler. You just divide principal by the number of months. That is why promotional financing feels very different from a normal loan.
Use the calculator next
Try changing only one variable at a time. Compare what happens when you shorten the term versus lower the APR. That usually teaches more than reading a table of offers.