Calculators that end in a shopping list

Most calculators hand you a decimal and wish you luck at the store. Ours round the answer up into bags, rolls, pallets and yards, the way you actually buy materials.

Every tool shows its formula on the page, names where its constants come from, and works one full example with real numbers. No sign up, nothing to install, the math runs in your browser.

Start with home and garden

Our first category is the home mega hub: landscaping materials, concrete, interior finishing, exterior projects, sizing and project costs. It is being built one silo at a time, starting with the materials people buy most.

How we keep the numbers honest

Formulas are printed on every page. Constants like roll sizes, bag volumes and material weights are listed in a table with their sources. If a number is an estimate that varies by supplier, the page says so and tells you what to confirm before ordering.