About buildcost.tools

Less time on arithmetic. More clarity on the job.

buildcost.tools brings common construction calculations into one place: concrete, foundations, reinforcement, masonry, earthworks, timber and pricing. Every tool shows its formula and the assumptions behind its result.

The site is designed for estimators, tradespeople and anyone checking a construction quantity. All calculations run in your browser. No account is required.

Transparent by design

We distinguish measured quantities from ordering allowances and budget estimates from engineering decisions. The glossary explains the language used in the tools, with worked examples you can check.

buildcost.tools is built and maintained by Kattegat Studio, a Denmark-based sole proprietorship, drawing on hands-on quantity surveying experience. The site exists to make everyday construction quantity and cost calculations transparent — every tool shows its formula, not just an answer.

Built to be checked

Use approved drawings, current supplier information and the relevant measurement rules. These tools support a calculation; they do not replace a qualified professional’s project-specific assessment.