Project category
Concrete & Masonry calculators
Volume, slab, footing and masonry material calculators.
- Concrete Slab CalculatorEnter your slab dimensions in metres and millimetres to get the cubic metres of ready-mixed concrete to order, with wastage and an optional VAT-aware cost estimate.
- Concrete Volume CalculatorEnter your pour dimensions in metres and millimetres — rectangular or cylindrical — to get the cubic metres of ready-mixed concrete to order, with wastage and an optional VAT-aware cost estimate.
- Concrete Cost Calculator UK — Ready-Mix Quote TotalTurn a current ready-mixed concrete supplier quote into an itemised GBP supply total while keeping physical volume, billed volume, fees and VAT separate.
How these concrete & masonry calculators work
Each calculator starts from site measurements in metres and millimetres, converts them with a tested formula, shows the exact quantity and your waste allowance as separate lines, then rounds up to the package or order unit you actually buy. Prices are optional and always entered by you, so the estimate reflects your supplier rather than a national average.
Concrete & Masonry measuring guides
Step-by-step guides with worked examples and reference tables for United Kingdom.
- How Much Postcrete per Fence Post (UK)Turn fence-post hole size into rapid-set post-mix bags for UK fencing using the bags-per-post figure printed on the label, with more for gate and corner posts.
- How Much Ballast and Cement for 1m³ of Concrete? (UK)About 18 × 25 kg bags of cement and 1.2 m³ of all-in ballast make 1 m³ of general-purpose concrete at 1:4. Ratios, bulk bags and quantities for 2 m³ and 3 m³.
- How Much Screed Do I Need? (UK Volume, Depth and Bags)How much screed do I need? Multiply floor area by depth: 10 m² at 50 mm is 0.5 m³. Minimum depths, screed over UFH and insulation, and 25 kg bags per m².
- Concrete Cost per m³ in the UK: How a Delivered Price Is BuiltConcrete cost per m³ in the UK is the supplier's rate × billed volume, plus part-load, pump, waiting time and 20% VAT. Worked 2.4 m³ slab example inside.