REDBO Tools
Real estate math,fully inspectable.
Enter the values, see the estimate update live, and expand every result to inspect how it was derived. Calculator state stays in the URL; no calculation record is created. These are estimates — never a quote, guarantee, or approval.
Mortgage payment
Calculate an itemized monthly payment from the values you enter.
Open instrument CalculatorAffordability
Compare income, debt, housing-cost, and DTI inputs in one calculation.
Open instrument CalculatorAmortization schedule
Full principal-and-interest schedule, plus what one extra payment a year does to term and interest.
Open instrument CalculatorInvestment / rental
NOI, cap rate, cash-on-cash, and DSCR from rent, vacancy, expenses, cash invested, and debt service you enter.
Open instrument CalculatorSeller net proceeds
Subtract the sale deductions you enter from a sale price.
Open instrument CalculatorRent vs. buy
Compare modeled renter and owner costs across a horizon you set.
Open instrument CalculatorClosing costs
Total the fixed and percentage-based closing-cost items you enter.
Open instrument CalculatorRefinance breakeven
Compare entered loan payments and costs over whole months.
Open instrumentThese calculators provide informational output from the values entered. They do not select inputs, recommend terms, or save a calculation.