Amortization Calculator: How It Works and How to Use It
See the complete month-by-month breakdown of principal and interest for any loan, from first payment to payoff.
Like every tool on UltimateTools, it runs instantly in your browser, updates as you type, and doesn't require an account or sign-up to use.
What it calculates
See the full principal-and-interest schedule for any loan.
Whether you think of it as a "amortization calculator" tool, a "amortization schedule or loan schedule" tool, or simply the Amortization Calculator, this page covers the same calculation.
You can find it at any time on the Amortization Calculator page, where the calculator sits above a full explanation of the method it uses.
Tips for an accurate result
Run the numbers with a slightly worse interest rate or a slightly lower income than you expect, so you understand your margin for error.
Inflation and rate changes compound over years, not months — for anything long-term, re-run the calculation at least once a year.
Double-check whether a figure you're entering is monthly or annual — mixing the two up is the most common source of a wildly wrong result.
Revisit the calculation whenever your income, rate, or balance changes materially — a one-time calculation goes stale fast.
Related tools worth trying
If you found the Amortization Calculator useful, Currency Converter, Home Affordability Calculator, Retirement Calculator cover closely related ground and are worth a look next.