Simple Loan Calculator
Quickly calculate any loan payment from amount, rate, and term — the simplest loan calculator online.
Loan Details
Enter loan details above to see your payment breakdown.
About the Simple Loan Calculator
A simple loan calculator does one thing well: turn a loan amount, interest rate, and term into a monthly payment and total cost. This one is built for speed — enter three numbers, get your answer immediately. No frills, no accounts, no waiting.
The monthly payment formula is the same for any fixed-rate loan: the standard amortization calculation that lenders use. Whether it is a personal loan, a student loan, a home improvement loan, or any fixed installment debt, the math is identical and this calculator handles it. You get the monthly payment, total of payments, and total interest so you see the full picture, not just the monthly number.
Because simplicity is the point, there is nothing to distract from the numbers. Enter what you know, read the result, and decide. It runs in your browser so it is instant and completely private.
Looking for more options? Open the full Loan Calculator — it’s the same tool with every feature.
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Frequently Asked Questions
What is the formula for calculating a loan payment?
The formula is: payment = P × (r(1+r)^n) / ((1+r)^n − 1), where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the number of months. This is the standard amortization formula that ensures the loan reaches zero at the final payment with equal monthly installments.
How do I calculate total interest on a loan?
Multiply the monthly payment by the number of months to get total of payments, then subtract the original loan amount. For example, a $10,000 loan at 8% for 5 years has a monthly payment of $202.76, total payments of $12,165.60, and total interest of $2,165.60.
Does a lower rate or shorter term save more?
Both save interest, but through different mechanisms. A lower rate reduces the interest charged per month. A shorter term reduces the number of months interest accrues. In practice, shortening the term often saves more total interest than a modest rate reduction, because you eliminate years of compounding — though it raises the monthly payment.
Understanding Loan Payments
How fixed payments work
A fixed monthly payment is engineered so the loan reaches exactly zero on the final payment date. Early on, most of each payment covers the month's interest because the balance is large; the principal portion is small. As the balance falls through each principal payment, interest charges shrink and more of each payment goes to principal. The total payment stays constant; only the split shifts.
The real cost of interest
Interest makes the total you repay significantly more than what you borrowed. On a $10,000 loan at 10% over 5 years, you repay nearly $12,750 — $2,750 more than you borrowed. This is not a fee; it is the cost of using the lender's money over time. Understanding total interest, not just monthly payment, is what makes borrowing decisions informed rather than emotional.
Comparing loan offers
When comparing loans, total interest paid is more informative than monthly payment alone. A lower payment from a longer term may mean paying more in total. A higher rate from a shorter term may mean paying less. Always calculate total of payments for each option and compare those alongside the monthly amounts before choosing a loan offer.