Buying a home is one of the biggest financial decisions you'll make, and understanding your monthly mortgage payment is essential for budgeting accurately. This mortgage calculator uses the standard amortization formula trusted by lenders to compute your monthly principal and interest payment based on home price, down payment, interest rate, and loan term. It also shows your total interest paid over the life of the loan, helping you compare 15-year vs. 30-year terms or evaluate how a larger down payment reduces long-term costs. Whether you're a first-time buyer or refinancing, this free tool gives you instant, accurate estimates without needing a mortgage broker.