Home Improvement & DIY Calculators
Estimate materials, measurements and quantities for common home improvement projects.
About these tools
Home and DIY calculators help estimate materials for projects such as paint, concrete, flooring, tile and other household improvements. They are useful for planning quantities before purchasing materials.
Real projects involve waste, cuts, surface condition, product coverage and installation practices. Calculator results should normally include an appropriate project-specific allowance rather than being treated as a guaranteed purchase quantity.
Browse Home & DIY
Paint Calculator
Estimate wall and ceiling paint, primer, containers, waste and material cost.
Open tool →Concrete Calculator
Estimate concrete volume for slabs, walls, footings and round columns.
Open tool →Tile Calculator
Estimate tile quantity, boxes, grout spacing, waste and cost.
Open tool →Flooring Calculator
Estimate flooring area, boxes, waste and material cost.
Open tool →Drywall Calculator
Estimate drywall surface area, sheets and waste.
Open tool →Gravel Calculator
Estimate gravel volume, approximate weight and material cost.
Open tool →Mulch Calculator
Estimate mulch volume, bags, cubic yards and material cost.
Open tool →Topsoil Calculator
Estimate topsoil volume, bags and bulk quantity.
Open tool →Roofing Calculator
Estimate simple gable roof area, squares, bundles and waste.
Open tool →Fence Calculator
Estimate fence sections, posts and rails from project length and spacing.
Open tool →Decking Calculator
Estimate decking board rows, linear footage, waste and board quantity.
Open tool →Square Footage Calculator
Calculate combined square footage or square metres for multiple rectangles.
Open tool →Wallpaper Calculator
Estimate wallpaper area, rolls, waste and material cost.
Open tool →Paver Calculator
Estimate patio or walkway paver quantity, packs, joints, waste and cost.
Open tool →Asphalt Calculator
Estimate asphalt volume, approximate weight and material cost.
Open tool →How calculations and results are handled
DIY calculators use entered dimensions, coverage rates and standard geometric formulas. Individual tools explain waste factors or assumptions that materially affect the estimate.
Each individual tool page explains its own inputs, result and important limitations where additional context is useful.