Loan & Amortization Calculator

A loan and amortization calculator shows you the two numbers that matter most before you borrow: what your monthly payment will be, and how much interest you will pay over the life of the loan. Enter the amount, the interest rate, and the term above to see your payment instantly, plus a full month-by-month amortization schedule.

What Is a Loan & Amortization Calculator?

Amortization is the process of paying off a loan in equal, regular installments over a set period. Each payment is split between interest (the cost of borrowing) and principal (the amount you actually owe). Early in the loan, most of each payment goes toward interest; later, more goes toward principal. A loan amortization calculator does this math for you, turning a loan amount, rate, and term into a clear monthly payment and a schedule that shows exactly how the balance shrinks over time. It works for business loans, equipment financing, mortgages, auto loans, and personal loans alike.

How to Use This Calculator

1. Enter the loan amount — the total you plan to borrow.
2. Enter the annual interest rate as a percentage (for example, 6.5).
3. Enter the term and choose years or months.
4. Click Calculate to see your monthly payment, total interest, and total of all payments.
5. Click Show amortization schedule to see every payment broken into principal, interest, and remaining balance.

How the Payment Is Calculated

The calculator uses the standard amortization formula. Your monthly rate is the annual rate divided by twelve, and the number of payments is the term in months. The fixed monthly payment is the amount that pays the loan to zero over that many months while covering interest along the way. From there, each month’s interest is the current balance times the monthly rate, and the rest of the payment reduces the principal. Because the balance falls a little each month, the interest portion falls too, and the principal portion grows — which is why the early payments feel “interest-heavy” and the later ones knock down the balance quickly.

Why the Schedule Matters

The amortization schedule is more than a curiosity. It tells you how much equity you build at any point, how much interest you will have paid by a given date, and what your payoff balance would be if you wanted to settle the loan early. It also reveals the real cost of a longer term: stretching a loan from three years to five lowers the monthly payment but can add a surprising amount of total interest. Seeing both numbers side by side helps you choose a term that fits your budget without quietly costing thousands more than you expected.

Tips for Borrowing Smart

• Compare the total interest, not just the monthly payment — the cheapest payment is often the most expensive loan.
• Even small extra payments toward principal shorten the schedule and cut total interest significantly.
• Watch for fees, origination charges, and insurance that the headline rate doesn’t include.
• A lower rate on a longer term can still cost more overall — run both and compare.
• Make sure the payment fits comfortably alongside your other fixed costs before you commit.

Fixed vs. Variable Rates, APR, and Shopping Around

This calculator models a fixed-rate loan, where the interest rate — and therefore your payment — stays the same for the entire term. Many loans work this way, and the predictability makes budgeting simple. Variable-rate loans are different: the rate can rise or fall over time, usually tied to a benchmark index, which means your payment can change. A variable rate sometimes starts lower than a comparable fixed rate, but it carries the risk that payments climb later, so it’s worth running a few scenarios with higher rates to see whether you could still afford the loan if the rate increased. When you compare offers, pay close attention to the APR rather than just the interest rate. The APR folds in certain fees and costs, so it gives a more complete picture of what a loan actually costs than the headline rate alone. Two loans can advertise the same interest rate yet have very different APRs once origination fees, points, and other charges are counted. It also pays to shop around rather than accepting the first offer: even a fraction of a percentage point, multiplied across years of payments, can mean a meaningful difference in total interest, which you can see for yourself by entering different rates above. Watch the term as well — lenders love to advertise a low monthly payment, but that low payment often comes from stretching the loan over more years, which quietly increases the total interest you pay. The smarter comparison is to look at the total cost of each option side by side, then choose the shortest term whose payment still fits comfortably in your budget. Finally, remember that your credit profile, the loan type, and the lender all influence the rate you’re offered, so the rate you plug in here is an assumption until you have a real quote in hand. Use the calculator to understand the mechanics and narrow your options, then confirm the exact figures, fees, and rate type directly with each lender before you sign anything.

Frequently Asked Questions

What is amortization? It’s paying off a loan in equal periodic payments, each split between interest and principal, until the balance reaches zero.

Why is so much of my early payment interest? Interest is charged on the outstanding balance, which is highest at the start. As the balance falls, the interest portion of each payment falls and more goes to principal.

Does paying extra really help? Yes. Any amount above the scheduled payment goes straight to principal, which reduces the balance interest is charged on and shortens the loan.

Is this calculator accurate for my loan? It uses the standard fixed-rate amortization formula. Your lender may add fees or use slightly different rounding, so treat the result as a close estimate, not a quote.

Can I use it for a mortgage or car loan? Yes — any fixed-rate, fixed-term installment loan amortizes the same way.

This calculator is provided for general information only and is not financial advice or a loan offer. Confirm exact figures with your lender.