About Build Calculators

Build Calculators was built because I kept needing it and it did not quite exist in the way I wanted. Not a supplier's calculator that steered me toward their products. Not buried in forums with conflicting answers. Just a clean, honest set of material estimators you can trust for real UK projects.

I am an experienced DIYer - the kind who has laid patios, poured concrete bases, built stud walls, set fence posts in Postcrete and taken on projects that most people would call a tradesperson for. The projects that prompted this site were the usual kind: a concrete base for a new shed, a patio that needed a proper sub-base, fence posts, floor screed, plasterboard. All requiring the same arithmetic: how much material, in what format, with how much spare?

Whether you are a first-time homeowner trying to plan a patio, a regular DIYer who does most of your own work, or a tradesperson wanting a quick quantity check without getting the calculator out - these tools are built for you. The numbers are practical, the assumptions are shown, and the results give you a sensible starting point for ordering.

Starting with the calculators I needed most and expanding from there. Now 14 calculators covering concrete, aggregates, flooring, walling, fencing, paving and waste.