Our Mission
Buying a home is one of the biggest financial decisions most people will ever make. Yet many buyers feel overwhelmed by the numbers — interest rates, amortization, PMI, DTI ratios — and end up making decisions without fully understanding the long-term costs.
MortgageTools.app was built to change that. We believe everyone deserves access to the same powerful financial tools that mortgage professionals use, presented in a simple and approachable way — completely free of charge.
Whether you're a first-time homebuyer trying to figure out what you can afford, a current homeowner evaluating a refinance, or someone just exploring your options, our calculators give you clear, accurate answers in seconds.
Why MortgageTools.app?
Accurate Calculations
Our calculators use the same formulas that banks and lenders use, giving you reliable estimates you can trust when planning your home purchase.
Instant Results
No waiting, no sign-ups. Every calculation updates in real time as you type. Get answers in seconds, not minutes.
Private & Secure
All calculations happen directly in your browser. We never store your financial information — not even temporarily.
Always Free
Every tool on MortgageTools.app is completely free to use, with no hidden fees, no paywalls, and no account required.
Our Free Tools
Mortgage Calculator
Estimate your monthly payment with full amortization schedule.
Refinance Break-Even Calculator
Find the month a refinance pays for itself, counting the interest it saves.
Mortgage Points Calculator
See the cost, monthly savings, and break-even month of buying mortgage points.
FHA Loan Calculator
Calculate FHA payments including MIP with 3.5% down.
Affordability Calculator
Find out how much house you can afford based on your income.
Rent vs. Buy
Compare the long-term cost of renting versus owning a home.
Arizona Property Tax Calculator
Estimate Arizona property tax by county with 2025 Census data.
Mortgage Blog
Expert guides and tips to help you make smarter mortgage decisions.
How Our Calculators Work
Every calculator on MortgageTools.app uses the same mathematical formulas that licensed mortgage professionals and bank underwriting systems use. Our mortgage payment calculator applies the standard amortization formula — M = P × [r(1+r)^n] / [(1+r)^n − 1] — where P is the principal, r is the monthly interest rate, and n is the total number of payments. This produces the same P&I figure you will see on any lender's quote sheet.
Beyond the basic payment, our tools model the full picture: property taxes, homeowners insurance, PMI (entered as a flat monthly amount that applies for the full loan term, so it does not model cancellation), HOA fees, and escrow. In practice, you can request PMI cancellation at 80% of the original home value, and your lender must cancel it automatically at 78%. The FHA calculator applies the current 1.75% upfront MIP and the accurate annual MIP rates based on your loan-to-value ratio and term. The Refinance Break-Even Calculator finds the month a refinance pays for itself by comparing what each loan costs you, closing costs plus interest paid, month by month.
All calculations run entirely in your browser using JavaScript. Calculator inputs are processed entirely in your browser and never sent to a server. We use Google Analytics and Google AdSense, which use cookies; see our Privacy Policy. The results update in real time as you adjust inputs, so you can explore scenarios — different rates, terms, down payments — instantly, without waiting for a page reload or submitting a form.
Our Content Standards
Every article and educational resource on MortgageTools.app is written specifically for this site. We do not republish or paraphrase content from other sites. Our goal is to provide information that goes beyond generic definitions — we include specific dollar figures, real-world examples, and direct links to the calculators you can use to apply each concept to your own numbers.
We focus on topics where the nuance matters: the difference between gross and net income in affordability calculations, the break-even math for buying mortgage points, the permanent vs. cancelable nature of FHA vs. conventional mortgage insurance. These distinctions are rarely explained clearly elsewhere, and they can affect your financial outcome by tens of thousands of dollars.
We do not sell leads, collect personally identifying information from calculator inputs, or partner with lenders. This site exists to help people understand mortgages better — not to funnel them toward a specific product or lender. Read our full methodology and editorial standards.
How We're Funded
MortgageTools.app is an independent, self-funded website supported by advertising. We're not a lender, broker or financial advisor. We don't collect leads or pass your information to lenders, and no lender pays to influence our calculators or articles. Calculator inputs are processed in your browser. Ads are served by Google, which uses cookies as described in our Privacy Policy.
Disclaimer
The calculators and content on MortgageTools.app are intended for informational and educational purposes only. Results are estimates based on the information you provide and standard mortgage formulas — they do not constitute financial, legal, or tax advice.
Actual loan terms, interest rates, and payments will vary based on your lender, credit profile, property details, and market conditions. Always consult with a licensed mortgage professional before making any financial decisions related to a home purchase or refinance.
Contact Us
Have a question, found a bug, or want to suggest a new tool? We'd love to hear from you.