Loan Amortization Calculator
See exactly how your loan gets paid off — right in your browser. This free loan amortization calculator breaks down every payment into principal and interest, showing how your balance shrinks month by month over the life of the loan. Enter your loan amount, interest rate, and term to get your monthly payment plus a full amortization schedule and total interest paid. Adjust any value and watch the numbers update instantly. It's ideal for mortgages, auto loans, and personal loans. Everything runs locally on your device — nothing you enter is uploaded or stored.
About Loan Amortization
- Amortization is the process of paying off a loan through regular, equal payments over a set term. Each fixed payment covers both interest and principal, but the split changes over time: early payments are mostly interest, while later payments are mostly principal, because interest is charged on the shrinking balance. An amortization schedule lays this out payment by payment, showing the interest, principal, and remaining balance for each installment. Understanding it reveals the real cost of a loan and why extra payments early can save so much interest. We built this calculator to make that schedule clear and instant, computed entirely in your browser.
How to Calculate Loan Amortization
It's simple. Enter your loan amount, annual interest rate, and term in years or months. The calculator applies the standard amortization formula to find your fixed monthly payment, then builds a full schedule showing how each payment splits between principal and interest and how the balance declines. You'll also see the total interest paid over the loan's life. Change any value to compare scenarios in real time. Every calculation happens in your browser, so nothing you enter is sent to a server.
Common Mistakes to Avoid
Looking only at the monthly payment
Solution:
Two loans can share a monthly payment but differ hugely in total interest. Check the full schedule and total interest, not just the monthly figure, to understand what the loan really costs.
Underestimating early interest
Solution:
In the early years, most of your payment goes to interest, not principal, so your balance drops slowly at first. Expect this from the schedule rather than being surprised by how little principal you've paid down.
Ignoring the impact of extra payments
Solution:
Paying extra toward principal early can dramatically cut total interest and shorten the term. If your loan allows it, factor extra payments in to see how much you could save.
Confusing loan term with total cost
Solution:
A longer term lowers each payment but raises total interest substantially. Compare terms in the schedule to weigh lower monthly cost against a higher lifetime cost.
Forgetting fees and insurance aren't in the schedule
Solution:
Amortization covers principal and interest only. Real loans may add taxes, insurance, or fees to your payment. Account for these separately so your budget reflects the full amount due.
Frequently Asked Questions
It's a payment-by-payment table showing how a loan is repaid over its term. For each installment, it lists how much goes to interest, how much goes to principal, and the remaining balance. This lets you see exactly how your debt shrinks over time and how much interest you pay in total.
Interest is charged on your outstanding balance, which is highest at the start. So early payments are mostly interest with little principal. As the balance falls, the interest portion shrinks and more of each payment goes toward principal, until the loan is fully paid off.
Choosing a shorter term, securing a lower rate, or making extra payments toward principal all reduce total interest. Even small additional principal payments early in the loan can save a significant amount, because they shrink the balance that interest is calculated on.
Yes, significantly. A longer term lowers your monthly payment but increases total interest, since you're borrowing for longer. A shorter term raises the monthly payment but cuts total interest. The amortization schedule shows this trade-off clearly.
No. All calculations run locally in your browser — nothing you enter is uploaded, logged, or stored on any server. That makes the tool private and safe to use, since your loan figures never leave your device.
Loan Amortization Calculator — Free Online Tool to Build a Full Payment Schedule with Principal & Interest Breakdown
A loan amortization calculator that shows the complete story of how a loan is repaid. Enter your loan amount, interest rate, and term, and it calculates your fixed monthly payment along with a full amortization schedule — a payment-by-payment table showing how much of each installment goes to interest versus principal, and how your remaining balance falls over time. Early on, most of your payment goes toward interest; as the balance drops, more goes toward principal. Seeing this breakdown helps you understand the true cost of borrowing and the impact of rate and term. The calculator also totals the interest you'll pay over the life of the loan, and updates instantly when you change any input, so you can compare scenarios like a shorter term or lower rate. Because every calculation runs locally in your browser, nothing you enter is uploaded, logged, or stored. It's a private, dependable tool for anyone planning a mortgage, auto loan, or personal loan.