Mortgage Calculator

Calculate your monthly mortgage payment, total interest, and full amortization schedule for any home loan. Free, instant, no signup.

%
years
Formula: PMT = P × r / (1 − (1 + r)^−n)
  • P = loan principal
  • r = monthly interest rate (annual rate ÷ 12)
  • n = total number of payments (years × 12)

How to use the Mortgage Calculator

  1. Enter your values. Fill in the fields with your numbers.
  2. Calculate. Press Calculate to run the mortgage calculator.
  3. Use the result. Copy the result or try a related tool next.

Why use our Mortgage Calculator

Instant results. Enter your figures and the mortgage calculator returns an answer in seconds.
Free & private. Runs in your browser — no signup, and nothing is sent to a server.
Accurate. Uses standard formulas so you can rely on the numbers.

Free to use — premium coming soon

FREE
  • Unlimited calculations
  • Instant results
  • No signup
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About the Mortgage Calculator

The Mortgage Calculator estimates the fixed monthly principal-and-interest payment on a home loan, then projects the total interest you will pay across the full term and how the balance shrinks over time. You enter the loan amount (purchase price minus down payment), the annual interest rate, and the term in years. Because most mortgages are amortizing loans, the payment stays the same every month while the split between interest and principal shifts. This tool is built for buyers comparing offers, homeowners weighing a refinance, or anyone trying to learn how much house a given monthly budget can support.

Reach for this calculator before you make an offer, before you lock a rate, and whenever a lender quotes you a number you want to sanity-check. It is genuinely useful for testing scenarios: bumping the down payment to see how the payment drops, comparing a 15-year term against a 30-year term, or watching how even a half-point change in rate moves your total interest by thousands of dollars. Because it isolates principal and interest, it gives you a clean baseline you can then layer taxes, insurance, and PMI on top of for a fuller picture of your true monthly cost.

Under the hood it uses the standard amortization formula, A = P x i(1+i)^n / ((1+i)^n - 1), where P is the principal, i is the monthly rate (the annual rate divided by 12), and n is the total number of payments (years multiplied by 12). To build the amortization schedule, each month's interest equals the remaining balance times the monthly rate; whatever is left of the fixed payment reduces the principal, and the new balance carries to the next month. Early on, most of your payment is interest because the balance is large, but the principal portion grows steadily until the loan reaches zero.

The figures here are estimates for planning, not a loan offer or an official amortization statement. The calculation covers principal and interest only, so it excludes property taxes, homeowners insurance, private mortgage insurance, and HOA dues that a lender bundles into your real payment. It also assumes a fixed rate and equal monthly payments, so adjustable-rate or interest-only products will differ. Everything runs in your browser: your loan amount, rate, and term are never uploaded, stored, or sent to a server, so you can model sensitive numbers privately.

Frequently asked questions

What does this mortgage calculator include in the monthly payment?

It calculates only principal and interest, the core of an amortizing loan. It does not include property taxes, homeowners insurance, private mortgage insurance (PMI), or HOA fees, so your actual lender payment (often called PITI) will be higher.

How is the monthly mortgage payment calculated?

It uses the standard amortization formula: A = P x i(1+i)^n / ((1+i)^n - 1), where P is the loan principal, i is the annual rate divided by 12, and n is the number of years multiplied by 12. This produces one fixed payment that fully pays off the loan over the term.

Why does so much of my early payment go to interest?

Each month's interest is charged on the remaining balance, which is largest at the start, so most of an early payment covers interest and only a little reduces principal. As the balance falls, the interest portion shrinks and more of every payment goes to principal.

Should I choose a 15-year or 30-year term?

A 15-year term has higher monthly payments but far less total interest because you borrow for half the time. A 30-year term lowers the monthly payment but costs much more interest overall; run both in the calculator to see the trade-off for your numbers.

What is PMI and when does it apply?

Private mortgage insurance is typically required on a conventional loan when your down payment is under 20 percent, and it protects the lender, not you. You can usually request cancellation once the balance reaches 80 percent of the home's value, and lenders must remove it automatically at 78 percent.

From our blog

How to Set a Savings Goal You'll Actually Hit

By the Super Simple Digital Tools Team · Updated June 2026

Most savings advice tells you to save more, but rarely tells you exactly how much. A savings goal calculator closes that gap by converting a target and a deadline into a single monthly figure. The hardest part is being honest about the inputs: a real goal amount, a realistic date, your true current balance, and an interest rate you can actually earn rather than a hopeful one. Get those right and the output becomes a number you can build a budget around instead of an aspiration that drifts.

Start with the goal and the deadline, because together they set the pace. The same $30,000 target needs roughly $1,250 a month over two years but only about $500 a month over five, before any interest. This is why the timeline is the most powerful lever you control: stretching the deadline by even a year can drop the monthly commitment to something sustainable, while a tight deadline forces a higher, less forgiving contribution that is easy to abandon after a rough month.

Your starting balance matters more than people expect. Because any money already saved keeps earning interest for the whole period, the calculator grows it forward and subtracts it from the goal before working out your payments. A modest head start therefore does double duty: it shrinks the gap directly and it compounds. If you have a windfall, a tax refund, or a bonus, applying it as the initial deposit usually lowers your monthly number by more than the lump sum itself, thanks to that extra time in the market.

Interest is the quiet helper, but only if the money is in the right place. In a near-zero current account, the calculator essentially just divides your goal by the months remaining. Move the same plan to a high-yield savings account or a CD and a meaningful share of the goal can be funded by interest rather than your paycheck. Try entering a couple of realistic rates to see the difference; for longer goals especially, the choice of account can change the required monthly deposit noticeably.

Finally, treat the plan as a living document. Recalculate whenever your income changes, when you add a windfall, or when the goal cost shifts. If the monthly figure ever feels unaffordable, do not quietly give up on the goal, adjust the inputs instead: push the date, trim the target, or split one big goal into stages. The point of the calculator is not a perfect prediction but a clear, adjustable target that keeps you saving consistently.

  • Run the numbers at 0% interest first to see the worst-case monthly amount, then add a realistic rate to see how much an account upgrade saves you.
  • Enter any bonus or refund as your starting balance before calculating; it lowers the monthly figure by more than its face value over time.
  • If the monthly number tops 20% of your take-home pay, lengthen the deadline rather than abandoning the goal so it stays within a healthy savings rate.
  • For goals more than a couple of years out, pad the target by a few percent to absorb inflation, since the calculator works in today's dollars.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.

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