Free calculators for home projects, with no sign-up and no email.
Every home project starts with the same question: how much do I need? Too little material means another trip to the store in the middle of a job. Too much means money wasted on bags and boxes that sit in the garage for years.
We built these calculators to answer that one question fast, on your phone, standing in the store or in your yard. No account, no email, no app to install.
Each calculator uses the standard formula that builders and suppliers use for that material. Every page shows the formula in plain words, a worked example with real numbers, and the common mistakes that make people buy the wrong amount.
Where professionals add a little extra for cuts, spills and uneven ground, our calculators add it too, and the page tells you how much extra was added. Nothing is hidden.
Nothing. The calculators are free, and they will stay free. In the future the site may show simple ads to pay for its own costs, so the tools can stay free for everyone.
We check our formulas carefully, but if a result ever looks wrong to you, please tell us through the Contact page. Tell us the calculator name and the numbers you typed, and we will check it. Reports from visitors keep this site honest.