Mortgage Calculator
See your monthly payment, total interest, and amortization at a glance.
Principal and interest only — excludes property tax, insurance, PMI, and HOA dues. Estimates only, not financial advice.
About Mortgage Calculator
Mortgage Calculator estimates your monthly mortgage payment from the loan amount, interest rate, and term, and shows the full amortization schedule. It is the quick first-pass tool for comparing house prices, down-payment scenarios, and 15-year against 30-year terms — the back-of-envelope math you do before starting a serious affordability conversation with a lender.
Worked example: a $400,000 loan at 6.5% for 30 years gives a monthly principal-and-interest payment of about $2,528. Total paid over the life of the loan is around $910,000 — meaning roughly $510,000 in interest. Drop the term to 15 years and the monthly payment jumps to about $3,485, but total interest falls to about $227,000. Seeing both scenarios side by side is the point: the same loan, very different total cost.
The calculator covers principal and interest only. It does not include property tax, homeowners insurance, mortgage insurance (PMI or MIP), or HOA dues — together those can add 20–40% to the actual monthly cost (the full PITI figure), and they vary so widely by location that a single estimate would be misleading. It also assumes a fixed rate throughout; an adjustable-rate mortgage would change the schedule once the rate resets. Treat the output as an early planning estimate, not a lender quote.
All math runs in your browser. Your loan size, rate, and term assumptions are never uploaded or logged.