Mortgage Rates Calculator

A mortgage rates calculator shows how the interest rate you're offered translates into a monthly payment and a lifetime interest cost. By comparing several rates side by side, you can see in dollars exactly what a quarter- or half-point difference means — both for your monthly budget and for the total you'll pay over the life of the loan.

This tool is for borrowers shopping lenders or deciding whether to pay points to buy down their rate. Rates depend on your credit score, down payment, loan type, loan size and market conditions, and small differences compound enormously over 30 years. Loan size matters because, as of 2026, balances above the conforming limit — $832,750 on a one-unit home, up to $1,249,125 in high-cost areas — are jumbo loans that are often priced differently from conforming ones. Seeing the impact helps you judge whether a lower rate quote is worth higher fees.

Use the calculator to set a target: figure out which rate keeps your payment within budget, then shop multiple lenders to hit it. A practical tip — get quotes within a short window so rate-shopping inquiries count as a single credit pull, and always compare the APR, which folds in fees, not just the headline rate.