Professional-grade calculators for every stage of your build. Get accurate quantities, waste allowances, and material estimates in seconds -- completely free.
"Cuts my materials quotes down from an hour to a few minutes. I use it on site every day."
Mike T., Groundworks ContractorResults update in real time as you type -- no page reloads needed.
Adjustable waste allowances so you always order the right amount.
Download your calculation as a text file for the job site.
Fully responsive -- use it on site from your phone or tablet.
Whether you're pricing up a house extension, planning a loft conversion, or just need to know how many bricks to order, BuildersCalc.Pro gives you accurate, trade-grade material quantities in seconds. Use our 50+ free building calculators individually, or let a Project Kit do the heavy lifting - pick your project type, enter your dimensions once, and we'll hand you a pre-filled checklist of every calculator you need, in the right order. Many calculators also include UK Building Regulations guidance relevant to the element you're calculating - covering Part A (structure), Part B (fire), Part C (moisture), Part L (energy efficiency) and more - so you're not just getting quantities, you're getting the compliance context too.
No sign-up needed - save a project instantly to your browser and pick it up where you left off. Upgrade to Pro to unlock unlimited projects accessible from any device via your account, track progress with the Build Programme, and send professional material cost quotes to clients. Serious builders also use the UK Market Prices button on each calculator to pull in live trade material costs and generate instant cost estimates on the spot.
What makes us different
Calculate your materials, price the whole job with live UK trade costs, then save everything to a project you can come back to, share with a client, or adjust at any time. No spreadsheets, no software, no registration needed - just free, straight-to-the-point tools built the way trades actually work.
Tools
All calculators are free to use. No account required. Select a category below or use the search bar above.
Save any calculation to a named project. Come back later to refine measurements, update costs, or add more calculations - all stored locally in your browser.
Simple Process
Browse by category or search for the material type you need.
Input your dimensions and select your preferred unit of measurement.
Instant quantities with waste allowance included. Print or save to a project.
Tap UK Market Prices to price up materials at current trade rates.
Come back any time to tweak measurements or update costs - no registration needed.
Know exactly how much to buy - no under-ordering, no costly waste.
From the Blog
Before you build, make sure your project has the right consents in place.
Find out whether your project needs full planning permission or qualifies as Permitted Development. Covers extensions, outbuildings, loft conversions, fencing and more - with clear rules for England.
Explore planning guidesPlain-English guidance on all Parts of the Building Regulations - from Part A (structure) and Part B (fire safety) to Part L (energy efficiency). Know what Building Control will be checking before work begins.
Explore building regsWorking on a listed building? Most works - inside and out - require Listed Building Consent. Our guides cover the consent process, acceptable materials, enforcement risks, and how to find a heritage consultant.
Explore listed building guidesJoin thousands of builders and renovators who trust BuildersCalc.Pro for accurate material estimates.
