Mortgage, by the task in front of you

A mortgage is the biggest number most people ever sign their name to — so it's worth seeing the whole picture, not just the monthly figure a lender leads with. This hub pulls together every mortgage tool on CalcNotebook and points you to the right one for the question you're actually asking.

You can estimate your monthly payment and total interest, see how much sooner you'd be free — and how many thousands you'd save — by paying a little extra each month, and work backwards from your income to a comfortable borrowing amount. Alongside those sit the specifics: PMI (private mortgage insurance) and when it falls away, and your down payment with the real trade-offs of the "20% question".

Here's the part banks tend to skip. A lower monthly payment usually means a longer term and more interest paid overall; a lender approving you for a number isn't the same as that number being comfortable to live on; and small extras — insurance, fees, a floating rate — quietly change the total. So our tools show a DTI (debt-to-income) traffic light and the costs behind the headline, because you deserve the full story before you commit.

Everything runs privately in your browser — your income and loan details never leave your device. These tools are information to help you decide, not financial advice; for your specific situation, talk to a qualified adviser.

Mortgages are five different math problems wearing one word. Start from your actual question — every tool below states its formula, its assumptions and its sources, and none of them will ask for your email.

What will the monthly payment be?Mortgage Calculator
P&I, total interest, DTI zones — plus the full PITI payment with your taxes and insurance.

How much do I need up front?Down Payment Calculator
Amount at any %, your saving timeline, and what stretching to 20% changes.

What does less than 20% down cost?PMI Calculator
Monthly PMI, LTV, and the scheduled 80% / 78% cancellation milestones.

How fast can extra payments finish the loan?Mortgage Calculator — payoff mode
Years saved and interest avoided by paying extra principal.

Comparing two offers?Loan Calculator (A/B)
Two loans side by side: payment, total cost, the honest winner.

Guides for the paperwork side

How we verify these calculators: our methodology.