About DIY Project Calculators

DIY Project Calculators makes free, no-nonsense calculators for home and yard projects, so you can buy the right amount of material the first time. The site is built and maintained with the help of AI tools. Every calculator is tested against hand-worked examples, and the product numbers it uses (like bag yields) come from the manufacturer or another primary source cited on the page.

Privacy

The calculators run entirely in your web browser. The numbers you type are not sent to us or to anyone else.

We count page views with GoatCounter, a privacy-friendly analytics service. It doesn't use cookies or track you across sites. It records which page was viewed, the referring site, and general browser, screen size, and location (country, or state for US visitors), so we can see which pages are useful. It never sees the numbers you type into a calculator.

Estimates, not guarantees

Results are estimates for planning. Real jobs vary with uneven ground, spills, surface texture, and product differences, which is why the calculators let you add a waste allowance or enter the coverage from your own product's label. Follow the manufacturer's instructions and your local building codes.