How to use it
- Enter loan amount.
- Enter annual interest rate.
- Enter term in years.
- Click Calculate to see results.
Your mortgage calculator turns three numbers—loan amount, annual interest rate, and term—into three key figures: the monthly payment you’ll actually owe, the total interest you’ll pay over the life of the loan, and the grand total of all payments. Knowing the monthly payment helps you budget each paycheck, while the total interest shows the cost of borrowing and can guide decisions like refinancing. The total of payments simply adds the principal and interest, giving a clear picture of the loan’s overall expense. The tool updates instantly as you adjust any input, so you can experiment with different rates or terms and see how each change impacts your finances. Read the results: the payment column is what you’ll write a check for, the interest column is the extra cost, and the total column is the sum you’ll have paid by the end.
Pro tips
- Add a small buffer (5‑10%) to your payment estimate to cover rounding differences.
- Round the loan amount to the nearest thousand for quick mental checks.
- Enter the term in whole years; fractional years can distort the monthly figure.
- Avoid entering APR instead of the nominal rate—use the exact annual interest rate the lender quotes.
Real-life examples
- First‑time homebuyer comparing monthly costs of two loan offers.
- Refinance candidate testing how a lower rate changes their payment.
- Investor evaluating cash flow for a rental property mortgage.
Case study
Sarah saw a $250,000 loan at 4.5% for 30 years show a $1,267 monthly payment and $207,000 total interest. After adjusting the term to 15 years, the calculator revealed a $1,904 payment but only $85,000 interest, helping her choose a shorter, cheaper loan.