Best Mortgage CalculatorsFree Online Tools
From monthly payment estimates to refinance break-even analysis — run the numbers on every mortgage decision before you sign anything.
Mortgage Calculator Tools
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Mortgage Calculator
Calculate your monthly P&I payment, view the full amortization schedule, and compare 15-year vs 30-year total interest costs.
Open calculatorHome Affordability Calculator
Answer the #1 question before you start shopping: how much house can you actually afford based on your income and debts?
Open calculatorMortgage Refinance Calculator
See exactly how much you'd save by refinancing and calculate the break-even point before paying closing costs.
Open calculatorRent vs Buy Calculator
Is buying actually cheaper than renting right now? This tool accounts for appreciation, opportunity cost, and tax benefits.
Open calculatorHELOC Calculator
Already own a home? Calculate how much equity you can tap, your draw-period payment, and the full repayment schedule.
Open calculatorMortgage Guides & Articles
Understand the concepts behind the numbers
How a Mortgage Works: A Simple Explanation of Every Component
Most people sign a 30-year mortgage without fully understanding how their payments are split between interest and principal — or why they barely build equity in the first decade. Here's what's actually happening.
7 min readPMI Explained: What It Is, What It Costs, and How to Avoid Paying It
Private mortgage insurance protects your lender — not you — yet you're the one who pays for it. Here's what PMI costs, when you're required to carry it, and the smartest ways to eliminate it.
6 min read15 vs 30-Year Mortgage: The Math That Actually Decides It
Everyone says the 15-year mortgage saves more money. That's true — but the real question is whether the extra payment is better invested than paid into your mortgage. The answer surprises most people.
7 min readFirst-Time Home Buyer Guide: The Complete 2025 Walkthrough
Buying a home is the largest financial decision most people ever make — and the process is confusing by design. This guide walks every step from credit check to closing day, with numbers.
10 min readShould I Refinance My Mortgage? Complete Break-Even Guide
The question is not whether refinancing lowers your rate — it is whether you will stay long enough to break even on the closing costs. Here is the math.
6 min readWhat Do Mortgage Calculators Help You Estimate?
A mortgage calculator does far more than tell you a monthly payment. The right tools map your entire home purchase journey — from setting a realistic budget before you start shopping, to comparing loan products at the closing table.
Specifically, these calculators help you estimate: your monthly principal and interest payment at various rates and loan terms; the total interest paid over the life of the loan (which can easily exceed the home's purchase price on a 30-year mortgage); how extra monthly payments dramatically shorten your payoff timeline; and the precise break-even date when refinancing actually begins saving you money.
The tools work best together. Start with the Home Affordability Calculator to set a price ceiling based on your income and debts, then use the Mortgage Calculator to compare 15-year vs 30-year payments side by side, and finish with the Rent vs Buy Calculator to make sure you're making the right move for your situation.
How to Choose the Right Mortgage Calculator
The calculator you need depends entirely on where you are in the homebuying process. If you're still browsing listings, the Home Affordability Calculator tells you your maximum purchase price before you waste time falling in love with homes you can't afford. Once you have a specific property in mind, the Mortgage Calculator lets you model the exact monthly payment for any combination of price, down payment, rate, and term.
Already own a home? The Mortgage Refinance Calculator tells you how much you'd save at current rates and how long it takes to recoup closing costs. The HELOC Calculator shows how much equity you can access and what the draw-period payment looks like.
If you're on the fence between renting and buying, the Rent vs Buy Calculator is the most important tool here. It factors in price appreciation, the opportunity cost of your down payment, tax deductions, and maintenance costs — and gives you the honest financial answer rather than the conventional wisdom.