Free Mortgage Calculator – Monthly Home Loan Payment

What a Mortgage Calculator Does and How It Works

A mortgage calculator works out the monthly payment on a home loan and shows what that loan will cost you in total. You supply three things — the loan amount, the annual interest rate, and the term in years — and it returns your fixed monthly payment, the total interest you will pay over the life of the loan, and the total amount repaid. Seeing the total, not just the monthly figure, is the whole point: a home loan is usually the biggest debt a person takes on, and small differences in rate or term add up to lakhs or thousands over two or three decades. Home buyers, people weighing a refinance, and anyone budgeting before house-hunting use it to make that decision with real numbers. It uses the standard amortizing-loan formula, the same reducing-balance math behind any EMI: M = P × r × (1+r)^n ÷ ((1+r)^n − 1), where P is the principal, r is the monthly interest rate (annual rate ÷ 12 ÷ 100), and n is the number of monthly payments (term in years × 12). Each fixed payment covers the interest due that month plus a slice of the principal. Because interest is charged on the outstanding balance, early payments are mostly interest and later ones mostly principal — which is why shortening the term or shaving the rate can cut total interest far more than it changes the monthly figure. A concrete example shows the scale. Borrow ₹30,00,000 at 9% annual interest over 20 years. The monthly rate r is 0.09 ÷ 12 = 0.0075, and n is 20 × 12 = 240 payments. The formula gives a monthly payment of about ₹26,992. Across all 240 months you repay roughly ₹64,78,027, of which about ₹34,78,027 is interest — more than the original loan itself. That single figure is often what convinces a buyer to consider a shorter term or a larger down payment. Buyers use the tool in several ways. They check whether a given loan's monthly payment fits their income before applying, keeping the payment within a comfortable share of take-home pay. They compare a 15-year and a 20-year term to weigh a higher monthly payment against a much lower total interest. They line up offers from different lenders by entering each rate in turn, since even a quarter-percent difference compounds into a large sum over decades. They test how a bigger down payment shrinks both the monthly figure and the lifetime interest. And for a refinance, they enter the new rate, the remaining balance, and a proposed term to see whether switching actually saves money once you account for the interest already paid on the old loan. A few caveats matter. The result covers principal and interest only; property tax, home insurance, and any society or association fees are extra and vary by location, so add them separately when budgeting the true monthly cost. Adjustable-rate loans change over time as benchmark rates move, so a fixed-rate estimate is a snapshot for a variable loan. The common mistake is judging affordability on the monthly payment alone while ignoring the total interest and the extra ownership costs. Two comparisons make that concrete on the same ₹30,00,000 loan: cutting the term from 20 years to 15 raises the payment to about ₹30,428 but drops total interest to ₹24,77,040, saving roughly ₹10 lakh. Negotiating the rate from 9% down to 8.75% barely moves the monthly figure — ₹26,511 instead of ₹26,992 — yet still saves about ₹1.15 lakh over the full term. Treat the output as a strong planning estimate, not a loan offer, and confirm exact terms with your lender. The calculator runs entirely in your browser and never stores your numbers.

Mortgage Calculator Formula & Method

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