Free Home and Decor Calculators

These free tools take the guesswork out of the projects on this site. Each one shows its formula, a worked example and where its numbers come from, and runs in your browser, so nothing you type is sent anywhere.

Planning wall art? The gallery wall layout planner arranges your frames with even spacing and tells you how high to hang them. Setting up a room, the rug size guide and the curtain size calculator turn your measurements into the sizes to buy. And the home maintenance checklist lists the monthly and seasonal safety jobs, ready to print. We publish no prices: wherever a size depends on a rule, we cite the maker or agency that states it.