How To
Calculator Guides
Learn exactly how each calculator works — inputs, outputs, formulas, and the mistakes professional underwriters avoid.
Rental ROI Calculator
The Rental ROI Calculator translates a property's price, rent, expenses, and financing into the three numbers serious investors actually act on: monthly cash flow, cash-on-cash return, and the proprietary Investment Score.
Cap Rate Calculator
Cap rate is the single fastest way to compare two investment properties. Because it strips out financing, it isolates the property's underlying earning power.
BRRRR Calculator
BRRRR works only when the refinance recovers most or all of your original cash. The calculator models the entire cycle — from purchase through refinance — so you know exactly what's left in the deal.
Airbnb Profit Calculator
Short-term rentals can generate 1.5–3x long-term rental income, but operating costs and revenue volatility are far higher. This calculator builds a realistic monthly P&L from nightly-rate and occupancy inputs.
Mortgage Impact Analyzer
A 1% rate change can shift a deal from profitable to negative cash flow. The Mortgage Impact Analyzer shows the full ripple effect across payment, interest paid, and amortization schedule.
Cash Flow Stress Tester
Stress testing is what separates professional investors from retail buyers. The Stress Tester applies vacancy spikes, rent declines, and expense shocks to your underwriting and reports survival scores.
Portfolio Growth Calculator
Real estate's compounding is the whole point. The Portfolio Growth Calculator forecasts 30 years of equity, cash flow, and net worth using realistic appreciation and rent growth assumptions.
Market Opportunity Analyzer
The right market eliminates 80% of underwriting risk. The Market Opportunity Analyzer ranks U.S. metros against your strategy preference (cash flow vs appreciation vs balanced).