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Material coverage & quantity guides
Worked examples, coverage tables and practical formulas for planning decorating, building and landscaping materials.
Paint
Room Paint CalculatorEstimate paint for a room from wall area, coats and coverage.Paint Coverage GuideUnderstand typical paint coverage and why real-world coverage varies.How Much Paint for 50 m²?Worked paint quantities for a 50 m² surface at common coverage rates.Paint Litres Coverage TableQuick-reference table for litres of paint by area and number of coats.Ceiling Paint CalculatorEstimate ceiling paint from room length, width, coats and coverage.
Concrete
Concrete Slab CalculatorEstimate concrete volume for rectangular slabs, pads and bases.Concrete Bag CalculatorConvert concrete volume into an approximate number of premixed bags.Concrete Volume TableReference concrete volumes for common slab sizes and thicknesses.How Much Concrete for 10 m²?Worked concrete quantities for 10 m² at common slab depths.Concrete Calculation FormulaLearn the volume formula behind concrete quantity estimates.
Gravel
Driveway Gravel CalculatorEstimate gravel for a driveway from area, depth and bulk density.Gravel Depth GuideCompare gravel quantities at common landscaping depths.Gravel Weight TableReference tonnes of gravel by area and depth.How Much Gravel for 20 m²?Worked gravel quantities for a 20 m² area.Gravel m³ to Tonnes GuideConvert cubic metres of gravel into approximate tonnes.
Soil
Raised Bed Soil CalculatorEstimate soil volume for rectangular raised beds and planters.Topsoil Depth GuideCompare soil volume at common topsoil depths.Soil Volume TableQuick-reference soil volumes by area and depth.How Much Soil for 10 m²?Worked soil volumes for a 10 m² area.Soil Litres to m³ ConversionConvert bagged soil litres to cubic metres and back.
Mulch
Mulch Depth CalculatorEstimate mulch volume at different layer depths.Mulch Volume TableReference mulch litres by area and depth.How Much Mulch for 20 m²?Worked mulch quantities for 20 m² of beds.Bags of Mulch GuideConvert required mulch volume into common bag quantities.Mulch Litres to m³Simple reference for converting mulch litres and cubic metres.
Tiles
Wall Tile CalculatorEstimate wall tile count from wall and tile dimensions.Floor Tile CalculatorEstimate floor tile count with a waste allowance.Tile Waste Allowance GuideUnderstand why tile projects need spare material.Tiles per Square Metre TableSee approximate tile counts per m² for common tile sizes.Tile Size & Area GuideConvert tile dimensions into area for quantity calculations.
Flooring
Laminate Flooring CalculatorEstimate laminate packs including a waste allowance.Vinyl Flooring CalculatorEstimate vinyl plank or tile packs by room area.Flooring Waste GuideChoose a planning allowance for flooring cuts and layout.Flooring Pack CalculatorConvert square metres required into whole flooring packs.How Much Flooring for 20 m²?Worked flooring pack example for a 20 m² room.
Decking
Deck Board CalculatorEstimate decking board count from deck and board dimensions.Decking Gap GuideSee how board spacing affects board quantities.Decking Waste GuidePlan for cuts and unusable offcuts in decking projects.Decking Area & Board TableQuick-reference board quantities for example deck sizes.How Many Deck Boards for 20 m²?Understand why area alone is not enough to count deck boards.
Bricks
Bricks per Square Metre GuideReference brick counts per m² and why format matters.Wall Brick CalculatorEstimate brick quantity from net wall area.Brick Waste Allowance GuidePlan spare bricks for cuts, damage and matching.How Many Bricks for 10 m²?Worked brick quantity for a 10 m² wall.Brick Quantity TableQuick-reference nominal brick counts by wall area.
Plaster
Plaster Bag CalculatorEstimate whole bags from area and stated bag coverage.Plaster Coverage GuideUnderstand plaster bag coverage and thickness assumptions.Plaster Wall Area GuideCalculate net wall area before estimating plaster.How Much Plaster for 20 m²?Worked method for estimating plaster on 20 m².Plaster Waste & Yield GuidePlan for mixing loss and uneven backgrounds.
Insulation
Loft Insulation CalculatorEstimate insulation packs for a measured loft area.Wall Insulation CalculatorEstimate insulation board or roll area for walls.Insulation Pack CalculatorConvert required area into whole packs.Insulation Waste GuideAccount for cuts around joists, studs and openings.How Much Insulation for 50 m²?Worked method for a 50 m² insulation project.
Wallpaper
Wallpaper Roll CalculatorEstimate wallpaper rolls from wall dimensions and usable roll yield.Wallpaper Drop CalculatorUnderstand drops per roll from wall height and pattern repeat.Wallpaper Pattern Repeat GuideSee why pattern matching changes roll requirements.Wallpaper Coverage TableReference nominal roll coverage before pattern losses.How Many Wallpaper Rolls Do I Need?Step-by-step method for estimating whole wallpaper rolls.
Roofing
Roof Area CalculatorEstimate sloped roof area from plan dimensions and pitch.Roof Pitch Factor TableReference multipliers for converting plan area to slope area.Roofing Waste GuideUnderstand laps, cuts and breakage allowances.Roof Tile Quantity GuideConvert roof area into tiles using product coverage.How Much Roofing for 50 m²?Worked method for planning material on a 50 m² roof area.
Sand
Sand Weight CalculatorEstimate bulk sand weight from volume and density.Sand Volume TableReference cubic metres by area and layer depth.Sand m³ to Tonnes GuideConvert cubic metres of sand to approximate tonnes.How Much Sand for 20 m²?Worked sand quantities at common depths.Sand Depth GuideSee how layer depth changes required sand volume.
Screed
Floor Screed CalculatorEstimate screed volume from floor area and thickness.Screed Bag CalculatorConvert required screed volume into whole bags.Screed Thickness Volume TableCompare volumes for common floor areas and screed depths.How Much Screed for 20 m²?Worked screed volumes for a 20 m² floor.Screed Volume FormulaLearn the formula for floor screed quantity.
Stain
Deck Stain CalculatorEstimate stain for decking by surface area and coats.Fence Stain CalculatorEstimate fence stain from panel area, sides and coats.Wood Stain Coverage GuideUnderstand why stain coverage varies by timber.How Much Stain for 20 m²?Worked stain quantities for a 20 m² surface.Stain Coverage TableQuick-reference litres by area, coats and coverage.