Formula Library
Affordability Formulas
Spreadsheet formulas to calculate how much home, car, or rent you can afford based on your income, debts, and expenses.
Car Affordability Calculator
beginnerCalculate how much car you can afford based on income using the 10-15% rule in Google Sheets with step-by-step examples.
=monthly_income * 0.10 Mortgage Affordability Calculator
beginnerCalculate how much house you can afford based on income, debts, and the 28/36 rule using Google Sheets formulas.
=monthly_income * 0.28 Rent vs Buy Calculator
intermediateCompare the true cost of renting versus buying a home over time with practical spreadsheet formulas and examples.
=buy_costs - rent_costs