Mortgage planner

Estimate principal, monthly principal & interest, plus escrow add-ons.

Total purchase price.

Leave blank for zero down.

Annual percentage rate.

Mortgage maths explained

Payment formula

Monthly principal & interest use M = P × r × (1 + r)n ÷ ((1 + r)n − 1) where r is monthly rate and n is total months.

Escrow add-ons

Yearly tax and insurance amounts are divided by 12 and added to each monthly payment for an at-a-glance affordability estimate.

Exporting schedules

Need a full amortisation table? Check the download box and submit—the page will post and deliver a CSV you can open in Excel.

What is Mortgage Calculator?

Mortgage Calculator is a free utility calculator from WizardOfAZ. Use it to calculate age values with instant results as part of your planning and decision making, without installing extra software.

Because everything happens locally in your browser, your numbers stay under your control while you calculate age values with instant results.

Popular ways to use Mortgage Calculator

  • Streamline planning and decision making by using Mortgage Calculator to calculate age values with instant results.
  • Share deliverables faster—processed values are ready for download in seconds.
  • Combine Mortgage Calculator with other WizardOfAZ tools to keep complex workflows in one browser tab.

Examples and workflow tips

  • Upload a sample file, cast the spell to calculate age values with instant results, and download the processed result instantly.
  • Bookmark the Mortgage Calculator in your browser so recurring tasks stay only one click away.
  • Share the spell with teammates who need a quick, no-install way to calculate age values with instant results.

Frequently asked questions

Is the Mortgage Calculator secure?

Yes. The Mortgage Calculator runs entirely in your browser, which means your numbers never leave your device.

What can I do with the Mortgage Calculator?

You can planning and decision making by processing values without uploading them to an external service.

Can I use Mortgage Calculator on mobile?

Yes. WizardOfAZ tools are responsive, so you can launch the spell on desktops, tablets, or phones without installing extra apps.

Related tools to explore

Expand your toolkit with other WizardOfAZ spells that complement Mortgage Calculator: