What the tool does, how to run it, and what to expect from the result.
Analyse a rental property: monthly cash flow after the mortgage, cap rate, cash-on-cash return and net operating income. 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.
Cap rate = net operating income ÷ price, ignoring financing. Cash-on-cash = yearly cash flow after the mortgage ÷ cash you put in. The example property has a 6.72% cap rate but only a 2.93% cash-on-cash return at a 7% mortgage rate.
Property tax, insurance, HOA fees, repairs and maintenance (often 1% of the price a year), property management (8-10% of rent) and capital expenditures. Leaving them out makes a deal look better than it is.
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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.