About CalcTools.uk
CalcTools.uk is a free collection of construction and home improvement calculators built specifically for the UK market. Every calculator uses metric measurements, standard UK material sizes, and British building terminology.
Why We Built This
Most online construction calculators are designed for the American market. They use imperial measurements, US material sizes (4x8 ft drywall instead of 2400x1200mm plasterboard), and American terminology. UK builders and DIYers deserve better.
We also noticed that no calculator site shows you where the waste comes from. They just say "add 10% for waste" without explaining why. Our visual waste diagrams show the actual cutting layout so you can see exactly how many full sheets you need, where cuts are required, and what gets thrown away.
What Makes Us Different
- UK standard sizes — 215x102.5x65mm bricks, 2400x1200mm plasterboard, 25kg cement bags, 2.5L and 5L paint tins
- Visual waste diagrams — see exactly where every piece goes
- Real cutting patterns — actual sheet layouts, not just "area plus 10%"
- 100% free — no signup, no premium tier, no limits
- Privacy-first — all calculations run in your browser, nothing stored on our servers
Who This Is For
Whether you're a professional tradesperson working on site or a DIY enthusiast tackling a weekend project, CalcTools.uk helps you calculate exactly what materials you need before heading to the merchant. Stop guessing, stop overbuying, stop running out halfway through a job.
Contact
Got a suggestion for a new calculator or found a bug? We'd love to hear from you. Email us at [email protected].