Borrowing

Use the 10/1 ARM calculator to project the opening payment, year-10 balance, reset-payment shock, extra-principal paydown, planned exit checkpoint.

Check whether a proposed mortgage payment and recurring debt load fit the 28/36 rule, then see the safe housing cap and the exact adjustment needed.

Convert gross income into a 3x rent ceiling, test a listing rent, or reverse rent into the gross income many landlords expect during tenant screening.

Compare fixed-rate loan offers by estimating APR, amount financed, finance charge, early-payoff effective APR.

Estimate ARM teaser payment, first reset payment shock, fully indexed rate, capped worst-case payment path, and an ARM vs fixed-rate mortgage checkpoint.

Estimate after repair value, comp-based ARV range, flip profit, ROI, break-even sale price, and a 70% rule maximum offer from rehab, sale-cost.