Real estate investment calculators
Real estate math you can check yourself.
Free deal-analysis tools for investors, landlords, and flippers — cap rate, cash-on-cash return, ARV, the 70% rule, and more. Every formula shown, every assumption yours to set.
General notes
- Every calculator prints the formula it ran and cites the source it's grounded in — you can verify each figure by hand.
- Anything that varies by market — rents, rates, vacancy — is an editable input, never a hidden constant.
- Tools compute; they don't advise. What a number can't tell you is stated next to the number.
Net operating income as a percentage of purchase price — the standard first-pass measure of what a rental earns before financing, with every step shown.
Open tool →NOI CalculatorItemize income and operating expenses line by line to get a property's net operating income — the number cap rates and appraisals are built on.
Open tool →Cash-on-Cash Return CalculatorAnnual pre-tax cash flow after the mortgage, as a percentage of the cash you actually invested — cap rate's levered counterpart.
Open tool →Mortgage Payment CalculatorMonthly principal & interest from price, rate, and term — plus taxes, insurance, and HOA — with the amortization formula shown.
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