Enter your loan amount, interest rate, and term to calculate your fixed monthly payment and see the full amortization schedule — principal and interest broken out month by month.
How to Use the Mortgage Calculator
Home price, down payment, term, and rate cover the core numbers; the optional fees section adds upfront costs and insurance into the total if your lender charges them, but leave those at zero to see the bare loan math first.
Every mortgage in the world runs on the same underlying math. What changes from country to country — the rate, the term, local closing costs — is exactly what this calculator refuses to guess at. Enter your own numbers and it works out the fixed monthly payment, the upfront cash you'll need, and the total cost over the life of the loan.
M = P × [r(1+r)ⁿ] ÷ [(1+r)ⁿ − 1]P is the loan principal, r is the monthly interest rate (annual rate ÷ 12), and n is the total number of monthly payments. That's it — one formula, repeated every month for the full term, producing a payment that never changes.
Except the payment not changing is the interesting part. Interest is charged each month on whatever balance is still outstanding, which is highest at the very start of the loan — so a bigger share of an early payment goes to interest than to principal. As the balance shrinks, that split flips: more principal, less interest, same total payment throughout. It's why a 30-year mortgage barely dents the principal in year one despite feeling like real progress on paper.
There's no default interest rate here on purpose. Rates depend on your country, your lender, your credit profile, and literally the day you lock — treating any single number as "the" mortgage rate for a global audience would just be wrong. Enter what your lender actually quoted.
What this tool doesn't do: property tax, homeowners insurance, PMI, and HOA fees aren't in the number it gives you. Lenders quote those separately too, for the same reason rates aren't defaulted — they vary by property and place far too much to bake into one formula. Add them on top for the full picture of what you'll actually owe each month.