Real Estate Investment Calculators

Free calculators for rental property and fix-and-flip investors: run the numbers on a deal in minutes, with every formula explained.

FreeNo sign-upFormulas shownWorked examples

Calculators

%Cap rate calculatorNOI, cap rate and the most to pay for your target return.$Hard money loan calculatorInterest, points, balloon and the true cost of a flip loan.↗Cash on cash return calculatorCash flow after the mortgage and your return on cash invested.⌂ARV calculatorAfter-repair value from comps, plus your 70% rule max offer.⇄Bridge loan calculatorBorrow against the home you're selling to buy the next one.+Markup calculatorPrice from cost, markup vs. margin, and contractor bids.

Why DealMathly?

Every formula is on the pageNo black boxes: check any lender quote by hand.
Worked examplesEach guide walks through a full deal, made by the same code as the calculator.
PrivateYour numbers stay in your browser; nothing is stored.

DealMathly is for education and planning, not financial advice. See the disclaimer.