How to use it
- Enter the loan amount you plan to borrow.
- Add the annual interest rate and the loan term in years.
- Click calculate to see monthly payment, total interest and total of payments.
What it does – The calculator takes your loan amount, interest rate and term, then shows the monthly payment you’ll owe, the total interest you’ll pay over the life of the loan, and the grand total of all payments. Why it matters – Knowing these numbers helps you budget, compare offers, and avoid surprises at closing. How to read – The monthly payment is what you’ll pay each month. The total interest is the extra cost of borrowing. The total of payments is the sum of all monthly payments, equal to loan amount plus interest. You can experiment with different rates or terms to see how a lower rate or shorter term reduces interest. The tool updates instantly, so you can test multiple scenarios without a spreadsheet. Use the results to negotiate with lenders, decide on extra payments, or determine if a refinance makes financial sense.
Pro tips
- Round the loan amount to the nearest thousand for quick mental checks.
- Add a small buffer (1‑2%) to the interest rate to account for rate changes.
- Run the calculator with a one‑year shorter term to see interest savings.
- Double‑check that the rate is entered as a percent, not a decimal.
Real-life examples
- First‑time buyer comparing two mortgage offers.
- Homeowner evaluating the cost of refinancing after a rate drop.
- Investor estimating cash flow for a rental property purchase.
Case study
Sarah entered a $250,000 loan at 4.5% for 30 years and saw a $2,274 monthly payment, $568,000 total payments and $318,000 interest. By testing a 3.5% rate, she discovered a $2,124 payment and $264,000 interest, convincing her to negotiate a lower rate and save over $50,000.