Free real estate calculators
Honest math for landlords and investors. Every result is computed live from your inputs — no sign-up, no email, and the formula is printed on every page.
Cap Rate Calculator
NOI, cap rate, and cash-on-cash return from price, rent, and expenses.
70% Rule Calculator
Maximum allowable offer from ARV and repairs — and where the rule breaks down.
Vacancy Cost Calculator
What an empty unit costs, per day and per spell, turnover included.
Rent-to-Income Calculator
Rent to required income at 3×, or income to maximum rent — both directions.
ROI Calculator
What replacing your current tool stack with Doughy could save.
Every result on these pages is computed live from the numbers you enter, and each page prints its formula. Estimates for planning, not investment advice.