About

MaterialMath exists because most material calculators stop one step short of the thing you actually need. They tell you how many cubic yards of concrete a slab takes and leave you standing in a builders' merchant working out how many bags that is.

Every calculator here finishes the job. You get the quantity in trade units, the number of bags or boxes or sheets to put in the trolley, a waste allowance that reflects how that particular material is actually lost, and a cost if you tell it what you are paying. Then you get a shopping list you can copy.

It is built for DIYers and contractors, mostly working from a phone, often outdoors, usually mid-job. That shapes everything: the answer has to be readable in daylight, reachable without scrolling, and shareable as a link that reproduces exactly what you saw.

The site is free and supported by advertising. It does not sell materials, take affiliate commission on suppliers, or have any reason to tell you to buy more than you need.