Working calculators for concrete volume, flooring, paint, roofing, bricks, and drywall — essential for builders and DIY enthusiasts.
Whether you're a professional builder or tackling a home improvement project, accurate material estimation is essential to avoid waste and stay within budget. Our free construction calculators help you estimate concrete, flooring, paint, roofing, bricks, and drywall — all instantly and locally in your browser.
Ordering too little concrete means project delays; ordering too much wastes money. Our concrete volume calculator helps you determine exactly how many cubic metres you need for slabs, footings, columns, or foundations. Simply enter length, width, and depth, and the calculator provides the volume in cubic metres, plus an approximate weight in tonnes. Always add 5-10% for waste and spillage when ordering.
Our flooring calculator helps you estimate tiles, laminate, or hardwood needed for any room, including a 10% waste allowance for cuts and breakage. The paint calculator estimates how many litres you'll need for walls, ceilings, and trim — typically one litre covers approximately 10 square metres. Our roofing calculator calculates roof area based on pitch factor, helping you order shingles, tiles, or sheets accurately.
Building a wall? Our brick calculator estimates the number of bricks required based on wall dimensions. Standard UK brick dimensions are approximately 215mm × 102.5mm × 65mm, with about 60 bricks per square metre for a single-skin wall. Our drywall calculator helps you estimate plasterboard sheets needed for walls and ceilings, including 10% waste allowance.
Always measure twice and order slightly more than your calculation suggests — it's better to have leftover materials than to run out mid-project. Different suppliers may have different product sizes (e.g., tile dimensions, brick types), so always verify with your specific material. All our calculators include waste allowances by default to help you avoid costly mistakes.
All calculations are free and private — no signup, no email, no data collection. Bookmark this page for your next DIY project or professional job.