What the tool does, how to run it, and what to expect from the result.
Estimate interest-only payments and total interest while a house is being built, and the mortgage payment once the construction loan converts. The math updates instantly and runs on your device, so it is fast, private, and available offline.
A quick way to understand who this helps, what it solves, and where it connects next.
Shoppers, students, freelancers, and anyone who needs a quick, private calculation.
Fast everyday math without a spreadsheet, app install, or sign-up.
Short answers for the questions people usually have before trying a utility like this.
Yes. It is completely free, with no sign-up, no watermark, and no usage limits.
No. Amounts are currency-neutral and use the same unit across all inputs, so it works in any country.
Money is released in draws as work progresses and you pay interest only on what has been drawn. If on average half of a $400,000 loan at 8.5% is out during a 12-month build, the payments average $1,416.67 a month.
A construction-to-permanent loan converts into a regular mortgage; a stand-alone loan must be repaid, usually by taking out a new mortgage. This shows the 30-year payment at the permanent rate you enter.
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Enter your numbers and the result updates live in your browser. Nothing is uploaded and no server is used.
Calculations run locally in your browser. Amounts are shown without a currency symbol so they work anywhere.