About CalcBarn

CalcBarn is a collection of free, no-nonsense calculators for home improvement and construction projects — concrete, paint, flooring, mulch and gravel. Each one gives you an instant, accurate material estimate so you can buy the right amount the first time.

Why we built it

Most project calculators online are buried in ads, ask for your email, or hide the formula they use. We wanted the opposite: clean, fast tools that show their work, run on any phone on the jobsite, and are completely free. Every result links back to the underlying formula so you can check it yourself.

Who runs this site

CalcBarn is built and maintained by The CalcBarn Team. We test each calculator against worked examples and industry rules of thumb before publishing it.

How we make money

The calculators are free to use. To cover hosting and development, some pages display ads and may link to relevant products. This never changes the results or what the tools cost you.