Concrete Volume Calculator
Calculate concrete volume in cubic metres for slabs, pads, footings and other rectangular pours.
Use calculator →Built for UK site measurements
Measure it. Calculate it. Order with less guesswork.
Free building-material and quantity calculators for builders, tradespeople, self-builders and serious DIYers. Enter your real dimensions, use your own product coverage where it matters, and get a clear estimate in seconds.
Measure once. See the assumptions.No sign-up, no hidden formula.
52free calculators
15project planners
12reference guides
0sign-ups required
Popular tools
Start with the quantity you need today.
Every calculator shows its assumptions. Coverage rates, densities and waste allowances stay editable so you can use the figures from your actual supplier or product.
Brick Calculator
Estimate bricks for a wall from net wall area, bricks per square metre and a selectable waste allowance.
Use calculator →Plasterboard Calculator
Calculate plasterboard sheet quantities for walls or ceilings from area, board dimensions and waste allowance.
Use calculator →Paint Calculator
Estimate litres and tins of paint from area, coats, product coverage and tin size.
Use calculator →Roof Tile Calculator
Estimate roof tile quantity from measured roof area, tiles per square metre and breakage/cutting allowance.
Use calculator →Decking Board Calculator
Estimate decking board quantities from deck dimensions, board cover width, stock length and waste.
Use calculator →Fence Panel Calculator
Estimate fence panels, posts and gravel boards from total fence run and panel width.
Use calculator →MOT Type 1 Calculator
Estimate sub-base cubic metres and tonnes from area, compacted depth and an editable supplier density.
Use calculator →Floor Area Calculator
Calculate floor area in square metres from length and width, with optional quantity for repeated identical spaces.
Use calculator →Calculator library
Browse by job.
Find tools by material or stage of work instead of scrolling through one giant list.
CategoryMasonry & ConcreteBricks, blocks, mortar and concrete quantity tools for UK building projects.
CategoryWalls & PlasteringPlasterboard, plaster, render and partition calculators for walls and ceilings.
CategoryFloors & DecoratingFlooring, tiling, paint, wallpaper and finishing quantity calculators.
CategoryRoofingRoof covering, felt, battens and gutter quantity estimators.
CategoryTimber & CarpentryTimber, stud wall, skirting and decking quantity calculators.
CategoryLandscapingPaving, gravel, fencing, turf, topsoil and garden project calculators.
CategoryGroundworksExcavation, trench, aggregate, sub-base and spoil volume calculators.
CategoryMeasuring & ConversionsFast area, volume, linear-metre and unit conversion tools for site measurements.
How we calculate
Useful defaults, visible assumptions.
No mystery numbers
Where product coverage, density or waste can vary, the input stays editable. That is more useful than hiding a single “industry standard” behind the result.
Quantities, not structural design
These tools estimate materials and dimensions. They do not certify structural adequacy, compliance or suitability.
Check before ordering
Use drawings, manufacturer data and supplier information as the final authority. The toolkit helps you get to a sensible starting quantity faster.
Whole-job planning
One calculation rarely finishes the material list.
Use the project planners to connect area, volume, weight, packs and stock lengths without hiding the assumptions.
Patio Materials Estimator & Planning Guide
Plan a patio layer by layer: paving area, slab count, sub-base volume, bedding material and ordering checks.
Open →Decking Materials Estimator & Planning Guide
Estimate decking boards, joists and stock lengths as separate parts of the same deck rather than one rough area figure.
Open →Fence Materials Estimator & Planning Guide
Plan fence panels, posts, gravel boards and post-mix from the actual boundary run.
Open →Concrete Slab Materials Estimator
Calculate slab volume, ordering allowance, bag quantities and ready-mix cost from one measured slab.
Open →Brick Wall Materials Estimator
Estimate brick quantity and mortar demand from net wall area, openings and an explicit waste allowance.
Open →Stud Wall Materials Estimator
Plan studs, plates, noggins, plasterboard and fixings for a basic timber partition using separate quantity checks.
Open →Practical guides
All guides →Understand the measurement behind the answer.
How to Calculate Square Metres for Building Work
Measure rectangles, L-shaped rooms, walls and openings accurately before using any material calculator.
Read guide →How to Calculate Cubic Metres (m³) on Site
A practical guide to turning length, width and depth into concrete, excavation and aggregate volumes.
Read guide →Waste Allowances: When to Add 5%, 10% or More
Why cuts, breakage, layout and site variation matter — and why one waste percentage does not suit every material.
Read guide →How to Measure Walls, Doors and Windows for Material Estimates
A repeatable way to calculate gross wall area, deduct openings and avoid double-counting.
Read guide →How to Estimate Brick Quantities for a Wall
From net wall area to bricks-per-square-metre rates, openings, waste and ordering checks.
Read guide →How to Estimate Concrete for a Slab or Footing
Calculate geometric volume, convert millimetres correctly and decide what ordering allowance to use.
Read guide →