Mortgage Well

Mortgage calculators for every home financing question

Simple on the surface, powerful when you need it. Transparent assumptions, mobile friendly, printable, and shareable.

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Plain-English mortgage guides

Each calculator is paired with a short, plain-English guide that explains the math, the trade-offs, and when to use it. Skim a guide, then run the numbers.

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Common mortgage questions

Quick answers to the questions most people start with — each links to the calculator that runs the numbers for your situation.

How much house can I afford?
Affordability is set by your debt-to-income ratio (DTI). Your housing payment plus other monthly debts should stay under your DTI cap. Run the affordability calculator to estimate a price range with conservative, moderate, and stretch tiers. Open the calculator →
What will my monthly mortgage payment be?
A full monthly mortgage payment usually includes principal & interest, property taxes, homeowners insurance, mortgage insurance when loan-to-value is above 80%, and any HOA dues. The mortgage payment calculator shows every piece with transparent assumptions. Open the calculator →
How much can I save by paying extra on my mortgage?
Extra principal payments shrink the balance you pay interest on every month afterward. Even a small monthly extra can shave years off the term and save tens of thousands of dollars in lifetime interest. The extra-payment calculator models monthly, annual, and lump-sum extras side by side. Open the calculator →
Is a 15-year or 30-year mortgage better?
A 15-year typically offers a lower rate and saves the most lifetime interest, but at a much higher monthly payment. A 30-year frees up cash flow at the cost of more total interest. The 15 vs. 30 calculator compares both — and the hybrid case where you pay a 30-year like a 15-year. Open the calculator →
When does PMI go away?
On a conventional loan, PMI is generally cancellable when your scheduled balance reaches 80% of the original home value, and the servicer is generally required to terminate it automatically at 78% LTV. The PMI calculator projects both milestones from your inputs. Open the calculator →
Should I refinance or recast my mortgage?
Refinancing replaces your loan with a new one — it can change the rate and term but has closing costs. Recasting keeps your rate and term but lowers the monthly payment after a lump-sum principal payment. Compare both against your goals using the refinance and recast calculators. Open the calculator →
Educational estimates only. Mortgage Well is not a lender and does not produce official Loan Estimates or Closing Disclosures. Numbers are illustrative and depend on the assumptions you choose.