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Real estate math, done fast.
Calculators built for buyers, investors, landlords, and pros. No login required — save your work with a free account.
Compliance
LL97 Penalty Calculator
Estimate your building's NYC Local Law 97 carbon penalty for the 2024–2029 period — and see how much the cap tightens in 2030.
Open tool →InvestorsROI & Cap Rate Calculator
Model cash flow, cap rate, and cash-on-cash return for any property. Save your scenarios with a free account.
Open tool →OwnersRefinance Break-Even Calculator
See monthly savings, break-even month, and total lifetime savings from refinancing your mortgage.
Open tool →More tools shipping soonComp finder, lien search, 1031 deadline tracker, and tax-appeal savings estimator.