Mortgage & Real Estate

Buying a home is one of the largest financial decisions most people ever make. Our free mortgage and real estate calculators are designed to give you the precise numbers you need — from your first estimate to closing day and beyond. Whether you're a first-time home buyer trying to understand what you can afford, a homeowner exploring refinancing options, or someone weighing the rent vs buy decision, these tools provide instant, accurate results with no sign-up required.

All calculations are performed locally in your browser using standard industry formulas. Your data is never transmitted to any server.

Use the House Affordability Calculator to set a realistic budget, then the Mortgage Payment Calculator to compare loan scenarios. The Down Payment Calculator helps you understand PMI and plan your savings target.

The Refinance Calculator shows whether a new rate is worth the closing costs and how many months until you break even. The Amortization Schedule lets you see exactly how extra payments reduce your total interest.

The Rent vs Buy Calculator projects the total cost of each path over 5, 10, 20, or 30 years — factoring in rent increases, home appreciation, property taxes, and the opportunity cost of your down payment.

All monthly payment calculations use the standard amortization formula: M = P × [r(1+r)^n] / [(1+r)^n − 1], where P is the loan principal, r is the monthly interest rate, and n is the total number of payments. This formula calculates a fixed monthly payment that covers both principal and interest, with the balance reaching exactly zero at the end of the term.

Early payments in an amortization schedule are weighted heavily toward interest because the outstanding balance is highest. Over time, as the principal decreases, more of each payment goes toward reducing the balance. This is why extra payments made early in the loan term have an outsized impact on total interest paid.

Principal is the original amount borrowed. Interest is the lender's fee for providing the loan, expressed as an annual percentage rate (APR). Amortization is the gradual payoff of the loan through regular payments. Down payment is the upfront cash you pay, reducing the amount you need to borrow. PMI (Private Mortgage Insurance) is required by most lenders when your down payment is below 20%, and typically costs 0.5%–1.5% of the loan annually.

Debt-to-Income Ratio (DTI) is a key qualification metric. Your front-end DTI (housing costs ÷ gross income) should ideally be under 28%, and your back-end DTI (all debts ÷ gross income) under 36% for conventional loans. FHA loans may allow up to 43%.