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Work out your monthly mortgage payment, total interest, and full payment schedule, plus the often-ignored real cost of the loan once inflation shrinks your fixed payment.
Default inflation rate for Other: 3.0% per year, based on long-run global CPI averages data (2026). You can override it in each calculator’s advanced options. See data sources for full citations.
The level monthly payment for a fully-amortizing fixed-rate loan is:
Where: P = loan amount (price − down payment), r = monthly rate (annual ÷ 12), n = total payments (years × 12), and i = annual inflation used to work out what future payments are worth in today's money.
Borrowing $320,000 (a $400,000 home with 20% down) at 6.5% for 30 years means a monthly payment of about $2,023 and roughly $408,000 in total interest, more than the amount borrowed. At 2.5% inflation, the real lifetime cost of those payments is about $514,000 in today's money, rather than the $728,000 headline total.
On that same $320,000 loan, adding $200 a month to every payment clears the mortgage about 4.5 years early and saves roughly $86,000 in interest.
Compare the Avalanche and Snowball methods across all your debts at once. See exactly when you'll be debt-free and how much interest each plan costs.
See how your savings grow with compound interest. Pick daily, monthly, quarterly, or annual compounding, add regular deposits, and see what it's worth today after inflation.
See how the value of money drops over time and what today's goods will cost in the future.