How to use it
- Enter the loan amount you plan to borrow.
- Type the annual interest rate as a percent.
- Set the loan term in years.
- View monthly payment, total interest and total of payments.
What it does – The calculator takes your loan amount, annual interest rate and term, then instantly shows three numbers: 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 the monthly cash outflow helps you budget, while the total interest figure reveals the true cost of borrowing. How to read it – The monthly payment is the amount you’ll transfer each month. The total interest is the extra you pay beyond the principal. The total of payments is simply principal + interest, giving you a clear picture of the overall expense. You can adjust any input to see how a lower rate or shorter term instantly improves your savings.
Pro tips
- Round the loan amount to the nearest thousand for a quick sanity check.
- Add a small buffer (5‑10%) to your budget for unexpected rate changes.
- Compare two scenarios side‑by‑side to see the impact of a few extra years.
- Remember that the monthly payment includes principal and interest only; taxes and insurance are separate.
Real-life examples
- First‑time homebuyer estimating monthly cash flow before making an offer.
- Refinance candidate checking how a lower rate reduces total interest.
- Investor evaluating the cost of a rental property mortgage.
Case study
After entering a $250,000 loan at 4.5% for 30 years, Maria saw a monthly payment of $1,266, total interest of $206,000 and total payments of $456,000. By adjusting the term to 15 years, her payment rose to $1,903 but total interest dropped to $84,000, saving $122,000 overall.