Datum: The Builders Calculator

Trusted by builders, tradespeople and DIY users. Calculate materials, quantities and dimensions in seconds with over 40 professional building calculators.

Professional Building Calculators in Your Pocket Whether you're on-site, pricing a job or planning a project, Datum gives you fast, accurate calculations without carrying spreadsheets or searching online. Designed for builders, tradespeople, surveyors and serious DIY users, Datum helps you save time and reduce costly mistakes. Features • 40+ professional building calculators • Concrete volume & material calculations • Brickwork & mortar quantities • Groundworks & tonnage calculations • Roof area calculations • Stair calculations • Timber & carpentry tools • Plastering calculations • Heating radiator BTU sizing • Air conditioning sizing calculator • Area, volume & geometry tools • Reference data for common construction tasks Built for Professionals Datum is designed around real construction workflows. Instead of generic calculators, every tool is built to provide practical results that can be used immediately on site or when preparing quotations. Whether you're estimating concrete, calculating brick quantities or sizing a radiator, the app provides fast and reliable answers. Fast. Accurate. Simple. • Clean interface • No unnecessary complexity • Works offline • Built for everyday use Perfect for: • Builders • Bricklayers • Groundworkers • Carpenters • Joiners • Plasterers • Electricians • Heating engineers • Air conditioning engineers • Quantity surveyors • DIY renovators Save time, reduce errors and keep every calculation in your pocket with Datum.