M MoneyMatrixs

Mortgage Calculator

Monthly payment, total interest and a full amortization schedule — instantly.

100% private — your numbers never leave your browser.

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How it works

Your monthly payment is computed with the standard amortization formula: M = P·r(1+r)ⁿ / ((1+r)ⁿ−1), where P is the loan amount, r the monthly rate and n the number of payments. Early payments are mostly interest; later payments go mostly to principal.

Mortgage FAQ

How much house can I afford?

Follow the 28/36 rule: keep housing under 28% of gross monthly income and all debt under 36%. On $6,000/month income, aim for a payment under $1,680.

15-year or 30-year?

A 15-year loan has higher payments but saves a fortune in interest — the comparison card above shows exactly how much on your numbers.

What is PMI?

Private Mortgage Insurance applies when your down payment is under 20%. It typically costs 0.5–1.5% of the loan per year and drops off once you reach 20% equity.