About Rental Property Calcs

Why this site exists

Most real estate calculators online either hide their formulas, ask for an email address before showing results, or bury the answer under sales pitches. We wanted simple tools that show every step, explain what the numbers mean, and work on a phone at a showing.

Each calculator lays out its results like a year-one pro forma and has a Show the math button so you can check the work. Each page also explains the formula, the inputs people get wrong and how to judge the result.

How the calculators work

All the math runs in your browser. Nothing you enter is sent to a server or saved. The formulas are the standard ones lenders, appraisers and investors use, and they are tested against known answers every time the site is updated.

We use occupancy rather than vacancy throughout, because that is how lenders and property managers report it.

What these tools are not

The calculators give estimates based on the numbers you enter. They are not financial, tax or legal advice, and they do not replace a lender's underwriting, an appraisal or a review by your accountant. Use them to screen and compare deals, then confirm the details with professionals.