Real estate calculators for investors.
The same metrics Keystone IQ tracks for your whole portfolio — free, no signup, no email required. Use them on individual deals or to brush up on the math.
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Returns & screening
Cap Rate Calculator
Capitalization rate — annual NOI divided by property value. The fastest single number for comparing two rental properties.
Open calculatorCash-on-Cash Return Calculator
Annual cash flow divided by the cash you actually invested. The after-mortgage return that tells you whether a specific deal is worth your money.
Open calculator1% Rule Calculator
The 30-second screen: does the monthly rent clear 1% of the price? A fast filter for which deals are worth a full analysis.
Open calculatorFinancing
Rental Property Mortgage Calculator
Monthly payment, total interest, and a full amortization chart — see exactly when your principal finally overtakes the interest.
Open calculatorDSCR Calculator
Debt Service Coverage Ratio — NOI divided by annual debt service. The number lenders use to decide if your rental qualifies for financing.
Open calculatorBy strategy
BRRRR Calculator
Buy, Rehab, Rent, Refinance, Repeat. See how much of your cash the refinance pulls back out — and how much stays trapped in the deal.
Open calculatorAirbnb / Short-Term Rental Calculator
Turn ADR and occupancy into gross revenue, NOI, RevPAR, and a short-term cap rate — plus the Schedule E vs. C and §280A angle long-term tools miss.
Open calculatorOn the way
More calculators coming
A 1031 exchange calculator and a rental depreciation calculator are next. Want to be told when they ship? Join the waitlist.