15-Year vs. 30-Year Mortgage Calculator: The Real Cost Difference
Compare 15-year vs 30-year mortgage payments, total interest, and the break-even math — so you can choose the term that actually fits your financial life.
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All articles about Mortgage Math & Affordability Calculator Toolkit.
The 28/36 Rule for Mortgages: How Lenders Calculate What You Can Afford
The 28/36 rule explained: how front-end and back-end ratios determine your mortgage approval and why the bank's maximum isn't your real budget.
How to Pay Off Your Mortgage Early: Extra Payment Strategies That Work
Extra mortgage payments can cut years off your loan and save tens of thousands in interest. Here's how to calculate the savings and which strategies work best.
Adjustable-Rate Mortgage Calculator: 5/1 ARM vs. Fixed — When the Lower Rate Is Worth the Risk
Understand how a 5/1 ARM calculator works, what your payment looks like after the initial period, and when an adjustable-rate mortgage beats a fixed one.
Alternatives to the Zillow Mortgage Calculator for First-Time Buyers
Zillow's calculator defaults to 20% down, skips PMI, and uses outdated tax data. Here are the alternatives that show you what you'll actually pay each month.
Best Mortgage Calculator for Buyers Who Just Got Pre-Approved
Pre-approval tells you the bank's maximum, not your comfortable budget. Here's how to run the calculations that actually matter before you make an offer.
Escrow Payment Calculator: How Much Goes to Taxes and Insurance Each Month
Your escrow payment is the portion of your mortgage covering property taxes and homeowners insurance. Here's how lenders calculate it and why it can change.
Extra Mortgage Payment Calculator: How Much Do Extra Payments Really Save?
See exactly how extra mortgage payments reduce your loan term and total interest — with real math, biweekly strategies, and payoff timelines.
How Much Income Do You Need to Afford a $400k or $500k House?
How much income you need to afford a $400k or $500k house depends on your down payment, rate, and existing debts. Here are the real numbers by scenario.
How Much Mortgage Can I Qualify For? DTI, Stress Tests, and Lender Rules Explained
Calculate how much mortgage you can qualify for using DTI ratios, income multiples, and stress test rules — including US, UK, Canada, and Australia.
How to Calculate Your PMI Cancellation Date — and Eliminate It Years Earlier
PMI cancels at 78% LTV automatically, or you can request it at 80%. Here's how to calculate the exact month — and how extra payments accelerate the timeline.
How to Calculate Your True Monthly Mortgage Cost: PITI, PMI, Taxes, and Insurance
Most calculators show only principal and interest. Here's the complete formula for calculating what you'll actually pay each month — PITI, PMI, HOA, and maintenance.
Interest-Only Mortgage Calculator: What You Actually Pay (and What You Don't Build)
Calculate interest-only mortgage payments and understand the true risks: no equity buildup, payment shock when the IO period ends, and negative amortization risk.
LTV Ratio Calculator: What Loan-to-Value Means for Your Mortgage
Calculate your LTV ratio and understand how loan-to-value affects your mortgage rate, PMI requirements, and approval odds.
Lump Sum Mortgage Payment Calculator: How Much Does One Extra Payment Save?
Making a lump sum mortgage payment can save tens of thousands in interest. Here's exactly how to calculate the savings and decide when it's worth doing.
Mortgage Amortization Schedule Calculator: How to Read (and Use) Your Loan Table
Understand your mortgage amortization schedule: how payments split between interest and principal, and how to use it to save thousands.
Mortgage Comparison Spreadsheet: How to Compare Loan Offers Side by Side
Comparing mortgage offers on monthly payment alone is a mistake. Here's how to build a proper side-by-side comparison — including total cost, break-even, and APR.
Mortgage Discount Points Break-Even Calculator: When Buying Down Your Rate Makes Sense
Calculate the break-even point for mortgage discount points before paying them. Real math on when buying down your rate saves money — and when it costs you.
Mortgage Insurance Premium Calculator: FHA MIP Costs Explained
FHA MIP costs more than most buyers expect. Here's how to calculate upfront and annual MIP, when you're stuck paying it forever, and how to escape it.
Mortgage Math Toolkit vs. Free Online Calculator: Which One Actually Tells You the Truth?
Free mortgage calculators are built to generate leads, not give you accurate numbers. Here's when a paid toolkit gives you a materially better answer.
Mortgage Payment on a $300K, $400K, and $500K House: What You'll Actually Pay
Real monthly mortgage payments on $300K, $400K, and $500K homes — including taxes, insurance, and PMI at different down payment levels and rates.
New Zealand Mortgage Calculator: Repayments, LVR Rules, and True Costs
How to calculate your NZ mortgage repayments, understand LVR restrictions, LEM/LEP charges, and the real monthly cost of buying in New Zealand's 2026 market.
PITI Calculator: What Your True Monthly Mortgage Payment Actually Costs
PITI calculator explained: why principal and interest is never your real mortgage payment, and how to calculate what you'll actually owe each month.
Price-to-Rent Ratio Calculator: How to Read Your Local Market
The price-to-rent ratio reveals whether buying or renting makes more financial sense in any market. Here's how to calculate it and what the number means.
Should I Buy Mortgage Points? The Break-Even Math Explained
Buying mortgage points costs 1% of your loan per point. Whether it's worth it depends entirely on how long you'll keep the loan. Here's the calculation.
How Much Interest Do You Pay on a Mortgage Over 30 Years?
The total interest on a 30-year mortgage often exceeds the original loan amount. Here's what you'll actually pay at different rates and loan sizes.
Variable Rate Mortgage Calculator: How Payments Change When Rates Move
A variable rate mortgage starts cheaper but carries rate risk. Here's how to calculate your payment at different rates and determine when fixed beats variable.
When Does PMI Go Away? PMI Cost Per Month and How to Remove It
Find out when PMI goes away, how much PMI costs per month on a conventional loan, and the fastest legal ways to eliminate it.