Mortgage & Housing Calculators
Whether you are a first-time home buyer estimating mortgage payments, a homeowner exploring refinancing options, or a renter weighing the long-term cost of buying versus renting, these calculators give you the clarity you need to make confident real estate decisions.
Use our mortgage calculator to see exactly how much you will pay each month, the home affordability calculator to find out what price range fits your budget, or the rent vs buy tool to compare the total cost of ownership against renting over time. We have also included the auto loan calculator here because vehicle financing is a key part of household budget planning for most homeowners.
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and amortization schedule for any home loan.
Home Affordability Calculator
Find out how much house you can afford based on your income, debts, and down payment.
Rent vs Buy Calculator
Compare the long-term financial impact of renting versus buying a home in your area.
Auto Loan Calculator
Calculate monthly car payments, total loan costs, and interest for any vehicle financing.
How to use these housing calculators together
Start with affordability, not with the payment
Most people open a mortgage calculator first, type in the price of a house they already like, and work backwards from there. That order hides the question that actually matters, which is how much house your income supports before you fall in love with a listing. Run the home affordability calculator first, using your gross annual income, your existing monthly debt payments, and the cash you can put down. It applies the two ratios lenders underwrite against: the front-end ratio, which caps housing costs at roughly 28 percent of gross monthly income, and the back-end ratio, which caps all recurring debt at roughly 36 to 43 percent depending on the loan program.
The number that comes out is a ceiling, not a target. Lenders qualify you on gross income, but you pay your mortgage out of net income, after tax, retirement contributions and health premiums have already been withheld. A borrower approved for a 600,000 dollar loan is frequently comfortable at 450,000. Take the affordability ceiling into the mortgage calculator, then step the price down until the monthly figure is one you would still be relaxed about during a year with a broken furnace and a lapse in bonus income.
The payment is more than principal and interest
A mortgage calculator that returns only principal and interest understates what leaves your account every month, often by 25 to 30 percent. The full monthly obligation, the figure lenders call PITI, adds property taxes and homeowners insurance, and adds private mortgage insurance whenever the down payment is under 20 percent of the purchase price. Property tax alone varies enormously by county, from well under 0.5 percent of assessed value to over 2 percent, so the same 400,000 dollar house can carry a difference of more than 500 dollars a month in tax depending only on where it sits.
Private mortgage insurance is worth modelling separately because it is temporary. It typically runs between 0.5 and 1.5 percent of the loan balance per year, and on a conventional loan it can be cancelled once you reach 20 percent equity. That makes a 10 percent down payment less punitive than it first appears, since the premium falls away after a few years of amortisation and appreciation rather than lasting the life of the loan. FHA loans behave differently, and on most current FHA terms the mortgage insurance premium runs for the full loan term unless you refinance out of it.
Where the rent versus buy comparison usually goes wrong
The common mistake is comparing rent against the mortgage payment. That comparison is not like for like, because a large share of an early mortgage payment is interest, which builds no equity, while ownership also carries costs a renter never sees. Maintenance is the item most often left out entirely. A reasonable planning figure is 1 to 2 percent of the home value per year, which on a 400,000 dollar house is 4,000 to 8,000 dollars annually, or 333 to 667 dollars a month, spent unevenly and usually at inconvenient moments.
The other omission is transaction cost. Buying costs roughly 2 to 5 percent of the price in closing costs, and selling costs another 6 to 10 percent once agent commission, transfer taxes and concessions are counted. Those are one-time costs, but they are large enough that they dominate the maths over short horizons. This is why the rent versus buy calculator reports a break-even period rather than a verdict: below the break-even, renting nearly always wins on pure numbers regardless of how the market moves, and above it, the equity and the fixed payment start to compound in the buyer's favour.
Rate changes move affordability more than price changes
It is worth running the mortgage calculator twice, once at the rate you are quoted and once a percentage point higher, because interest rate movement changes the monthly payment faster than list price movement does. On a 400,000 dollar 30-year loan, a move from 6 to 7 percent adds roughly 260 dollars a month, which is the same payment impact as raising the purchase price by about 40,000 dollars. A buyer watching for a 20,000 dollar price concession while rates drift up half a point is optimising the smaller variable.
The same asymmetry works in your favour on the term. Comparing a 30-year and a 15-year amortisation in the calculator shows a monthly payment that is meaningfully higher but a total interest cost that is often less than half. If the 15-year payment is out of reach, making one extra payment a year against a 30-year loan captures a useful fraction of the same benefit while leaving you the flexibility to stop in a bad year.