Tools

Calculators and converters that run entirely in your browser. There is no server to send anything to.

Every tool here is built the same way. It shows the arithmetic it used rather than only the answer, it says plainly what it does not account for, and it never invents a number it cannot actually derive from what you typed. Where a figure depends on something the page cannot know, such as your lender’s rate card or your county’s assessor, the tool asks for it instead of guessing on your behalf.

Published

• Calculator Mortgage Calculator The monthly payment, the formula that produced it, and the full amortization schedule. Taxes, insurance, mortgage insurance, and association dues are kept visibly separate from principal and interest. Open the calculator →

Planned

These are the next squares on this part of the map. They are listed because the mortgage calculator already borders on them, not as a roadmap with dates.

• Calculator Loan Calculator The same amortization engine without the housing-specific parts, for car loans, personal loans, and anything else with a level payment. Coming soon
• Calculator Compound Interest The other direction of the same arithmetic: what a balance grows to rather than what it takes to retire one. Coming soon
• Calculator Refinance Break-Even How many months of a lower payment it takes to recover what the refinance cost to close. Coming soon

The planned tools above are not yet published and are shown as plain text rather than as links, because there is nowhere for a link to go.