We assume your savings cover closing costs first, then up to 20% down (anything above stays as reserves). The comfortable maximum is the price whose payment plus your existing debts stays inside the ~36% total-debt guideline. The conservative target fits the housing payment alone inside the ~28% guideline.

What data does it use?

Standard amortization mathematics (public domain). Illustrative rates from the Freddie Mac Primary Mortgage Market Survey, dated on-screen.

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How Much House Can I Afford?: how it works

Finds the price range whose full monthly payment (principal, interest, tax, insurance, PMI when under 20% down) fits the widely published 28/36 debt-to-income guidelines for your income, debts, and savings.

Step by step

We assume your savings cover closing costs first, then up to 20% down (anything above stays as reserves).
The comfortable maximum is the price whose payment plus your existing debts stays inside the ~36% total-debt guideline.
The conservative target fits the housing payment alone inside the ~28% guideline.

The math

Monthly P&I = L·r/(1−(1+r)^−n) (public-domain amortization); 28/36 rule per consumer-finance references.

Sources

Standard amortization mathematics (public domain).
Illustrative rates from the Freddie Mac Primary Mortgage Market Survey, dated on-screen.