18 m² terrace slab, 12 cm
Concrete, bags and reinforcement allowance
2.38 m³ including 10% allowanceOpen the detailed example →BUILD MEASURE HELPER · PROJECT LIBRARY
Practical construction examples
Start from a real project, understand every assumption and open the calculator with the project already filled in.
25 m² garage slab, 15 cm
Vehicle-bearing reinforced slab
4.13 m³ including allowanceOpen the detailed example →Paint a 12 m² bedroom
Walls, two coats and primer
About 7–9 L depending on openingsOpen the detailed example →Paint a 20 m² ceiling
Two coats on a smooth ceiling
4.4 L with 10% allowanceOpen the detailed example →Laminate for a 20 m² living room
Straight layout, packs, underlay and skirting
21.4 m² to order at 7% wasteOpen the detailed example →Tile a 6 m² bathroom floor
Tiles, adhesive, grout and waterproofing
Wet-area system with 15% cutting allowanceOpen the detailed example →Wallpaper a 12 m perimeter room
Standard roll with 53 cm pattern repeat
Drops and rolls rounded for pattern matchingOpen the detailed example →Insulate a 40 m² attic
Two 100 mm crossed mineral-wool layers
R ≈ 5.4 m²K/W plus vapour layerOpen the detailed example →8 × 7 m gable roof at 30°
Concrete tiles, membrane, battens and gutters
Actual slope area, tiles and full accessoriesOpen the detailed example →Build a 6 × 2.4 m block wall
One door, blocks, mortar, ties and DPC
Complete masonry purchase listOpen the detailed example →20 m² paved patio
Pavers, bedding sand, base and edging
Complete layered paving systemOpen the detailed example →4 × 3 m timber deck
Boards, joists, posts and fixings
Structure and decking shopping listOpen the detailed example →12 m garden fence
Posts, bays, rails and concrete
Complete fence material listOpen the detailed example →Stairs for 2.8 m floor height
Risers, treads, run and stringers
Code-oriented stair geometryOpen the detailed example →Concrete strip footing 12 m long
Foundation concrete, bag yield and ready-mix comparison
1.58 m³ including 10% allowanceOpen the detailed example →Gravel driveway 30 m² at 8 cm
Compacted gravel, loose delivery weight and bag comparison
Compacted volume plus delivery and moisture allowancesOpen the detailed example →Tile a 12 m² kitchen floor
600 × 600 mm porcelain tiles, adhesive and grout
Straight layout with 10% cutting allowanceOpen the detailed example →Herringbone flooring for 24 m²
Pattern waste, packs, underlay and skirting
27.6 m² to order with 15% pattern wasteOpen the detailed example →Tile a 15 m² hallway with large-format tiles
Straight layout, 900×450 mm porcelain tiles
40 tiles with 8% cutting allowanceOpen the detailed example →Vinyl plank flooring for a 10 m² bedroom
Straight layout, underlay and skirting included
5 packs at 2.5 m² each with 7% wasteOpen the detailed example →Wallpaper a 9 m stairwell wall, plain pattern
No pattern repeat, standard 10.05 m rolls
6 rolls for a 2.7 m finished heightOpen the detailed example →Skim-coat a 25 m² ceiling
Finish-coat skim only, no base coat
2 finish bags and 1 primer canOpen the detailed example →Render a 15 m garden wall, one-coat system
Exterior one-coat render, no separate finish
8 base-coat bags with 10% wasteOpen the detailed example →Board an 18 m² garage ceiling
Single layer, fixed directly to existing joists
7 sheets with 10% wasteOpen the detailed example →Double-layer acoustic drywall for a 6 m basement wall
Sound-rated double layer, one door opening
10 sheets and 18 studs with 10% wasteOpen the detailed example →Insulate a 30 m² cavity wall with mineral wool
Single 100 mm layer, standard batts
4 packs at R ≈ 2.9 m²K/WOpen the detailed example →Concrete slab for an 8 m² garden shed
Light-duty base slab, 10 cm depth
0.86 m³ including 8% allowanceOpen the detailed example →Build a 4 m single-leaf brick garden wall
Low boundary wall, EU brick, DPC included
222 bricks with 8% wasteOpen the detailed example →Re-roof a 15 m² garden studio with a mono-pitch
Concrete tiles, low pitch, full accessories
180 tiles for the sloped area with 10% wasteOpen the detailed example →Small 3 × 2 m ground-level deck
Compact deck, boards only, ground-level frame
15 boards of 3.6 m with 8% wasteOpen the detailed example →6 m side-return fence panel run
Short run, four posts, two rails
4 bays and 5 posts with 5% wasteOpen the detailed example →Loft conversion staircase for 2.6 m rise
Steep compact stair, narrow width
13 equal risers of 200 mmOpen the detailed example →Pave a 10 m² side path
Narrow path, square pavers, light bedding
114 pavers with 6% wasteOpen the detailed example →Gravel drainage bed, 12 m² at 20 cm depth
Soakaway and drainage trench backfill
Compacted volume with delivery allowanceOpen the detailed example →Decorative gravel topping for an 8 m² garden border
Thin surface layer over a weed membrane
Loose light gravel volume and bag comparisonOpen the detailed example →Bedding sand for a 15 m² block-paved patio
Thin compacted bedding layer under pavers
Compacted bedding volume with delivery weightOpen the detailed example →Building sand delivery for a small masonry project
Bulk sand for mortar mixing on site
2 m³ before waste and moisture allowanceOpen the detailed example →Play sand for a 6 m² sandpit area
Washed, rounded play-grade sand
Weight and bag count for a shallow fillOpen the detailed example →Topsoil for a new 25 m² lawn
10 cm depth with settling allowance
Loose delivered volume above the finished depthOpen the detailed example →Topsoil for a 3 m² raised garden bed
Deep planting bed, looser soil mix
Fill volume for a 30 cm deep bedOpen the detailed example →Levelling topsoil for an 18 m² lawn
Thin levelling layer over an uneven area
Shallow-depth volume with waste and settlingOpen the detailed example →Bark mulch for a 12 m² shrub border
Standard bark mulch, weed suppression depth
Low-density volume and bag countOpen the detailed example →Wood-chip mulch for a 20 m² playground safety surface
Deeper safety-fall depth under play equipment
Higher depth increases volume significantlyOpen the detailed example →Mulch top-up for an 8 m² flower bed
Thin annual top-up over existing mulch
Small top-up volume, single bag likelyOpen the detailed example →Excavate a foundation trench for a 20 m² extension
Perimeter trench footing, bulking allowance
Bank volume plus 25% bulking for haul-awayOpen the detailed example →Excavate a 6 m² garden pond
Uniform 1 m depth basin
Spoil volume including bulking for disposalOpen the detailed example →Excavate a 30 m² patio sub-base
Standard sub-base depth before paving
Removed volume for a 25 cm sub-base digOpen the detailed example →Combine an L-shaped living and dining room, 32 m²
Two rectangles combined into one total area
32 m² combined floor areaOpen the detailed example →Garden lawn area minus a circular flower bed
One zone with a subtracted circular exclusion
Net lawn area after the flower bed is excludedOpen the detailed example →Total roof plan area across two building wings
Two independent rectangular roof footprints
68 m² combined plan area before slope correctionOpen the detailed example →Garden pond volume across two depth zones
Shallow shelf and deeper centre zone
2.7 m³ combined liner volumeOpen the detailed example →Raised planter box volume
Single zone, fixed depth planter
0.86 m³ of growing medium neededOpen the detailed example →Swimming pool volume, shallow and deep end zones
Two-zone pool with different depths
54.4 m³ combined water volumeOpen the detailed example →Repaint a 30 m² open-plan room
Walls and ceiling, two coats, openings and colour change
Paint and primer tins rounded to purchase sizesOpen the detailed example →Wallpaper a feature wall 4.2 m wide
Wide pattern repeat, full drops, one spare roll and paste
Pattern-rounded drop plan and complete rollsOpen the detailed example →Render an 80 m² house facade
Primer, reinforced base coat, mesh laps and silicone finish
Separate rounded purchase quantities for every coatOpen the detailed example →Insulate 55 m² of external walls
Mineral wool boards, thermal resistance, fixings and vapour control
Pack count for 140 mm insulation with 10% wasteOpen the detailed example →6 × 4 m mono-pitch metal roof
Steel sheets, overlaps, membrane, battens and gutter
Slope-corrected sheet count and roof accessoriesOpen the detailed example →Build a 10 m garden brick wall
Metric bricks, mortar, courses, coping allowance and DPC
Rounded brick, mortar and DPC purchase listOpen the detailed example →Board a 5 × 2.5 m partition both sides
Boards, studs, tracks, screws, tape and joint compound
Complete rounded drywall purchase scheduleOpen the detailed example →Pave a 36 m² vehicle driveway
Heavy-duty pavers, deeper sub-base, bedding layer and edges
Pavers plus loose bedding and sub-base delivery volumesOpen the detailed example →Raised 24 m² family deck
Deck boards, structural frame, posts, footings, fixings and guard rail
Full structural and surface shopping listOpen the detailed example →Install a 25 m privacy fence
Close-board pickets, three rails, posts, concrete and fixings
Bay layout and complete fence material quantitiesOpen the detailed example →Three-step garden stair for 52 cm rise
Equal risers, comfortable going, stringers, treads and handrail option
Compact stair geometry and timber quantitiesOpen the detailed example →Detailed, calculated and fully editable examples
Start from a real project, understand every assumption and open the calculator with the project already filled in.
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