Home Renovation Calculators

Free home renovation material calculators: estimate paint, wall and floor tiles, wallpaper, flooring, concrete, bricks, grout, curtains, drywall, stairs, gravel, roofing, fencing, decking, carpet, siding, mulch, insulation and pavers. Plan your DIY or contractor project accurately.

Wall Area m²

Number of Coats

Paint Coverage m²/L

Paint Needed (Liters)

4 L

Paint Needed (Gallons)

1.06 gal

View formula, FAQ and example →

More renovation tools

Walls & Windows

Paint Calculator

Free paint calculator: estimate how many liters or gallons of paint you need for any room. Input wall area, number of coats, and paint coverage. Prevent overbuying or running short.

Wallpaper Calculator

Free wallpaper calculator: find out how many rolls of wallpaper you need. Enter wall area, roll dimensions, and pattern repeat. Avoid buying too many or too few rolls.

Wall Tile Calculator

Free wall tile calculator: calculate how many tiles and boxes you need. Input wall area, tile size, and waste percentage. Perfect for bathroom, kitchen, and backsplash tiling projects.

Curtain Fabric Calculator

Free curtain fabric calculator: calculate how many meters of fabric you need. Enter window dimensions, fullness ratio, and fabric width. Perfect for custom curtains and drapes.

Drywall Calculator

Free drywall calculator: estimate how many plasterboard sheets, joint compound, screws, and tape you need. Enter wall area and sheet size. Ideal for partition walls and renovations.

Floors

Floor Tile Calculator

Free floor tile calculator: how many floor tiles and boxes you need. Enter floor area, tile size and waste percentage for living rooms, kitchens and bathrooms.

Grout Calculator

Free grout calculator: estimate how much tile grout you need by weight and volume. Input tile size, joint width, and density. Avoid buying too much or running out mid-project.

Flooring Calculator

Free flooring calculator: calculate how many boxes of laminate, hardwood, or vinyl flooring you need. Enter room area, plank size, and boxes per pack. Includes waste factor for cuts.

Carpet Calculator

Free carpet calculator estimates carpet area, roll length and total cost for any room, with waste allowance for cuts and joins.

Masonry & Structure

Concrete Calculator

Free concrete calculator: estimate concrete volume and material quantities for slabs and footings. Input length, width, depth, and mix ratio. Get cement bags, sand, and gravel estimates.

Brick Calculator

Free brick calculator: calculate how many bricks and how much mortar you need for a wall. Enter wall area, brick dimensions, and waste percentage. Essential for masonry projects.

Stair Calculator

Free stair calculator computes steps, riser height, tread depth, stringer length and stair angle from your rise and target riser, using code-friendly design rules.

Envelope & Insulation

Insulation Calculator

Free insulation calculator estimates rolls, batts or blown-in bags for attics, walls and floors based on your target R-value, with coverage and cost.

Siding Calculator

Free siding calculator estimates vinyl siding area, boxes and project cost. Enter wall dimensions and waste allowance for accurate material needs.

Shingle Calculator

Free shingle calculator estimates shingle bundles, underlayment rolls and nails from roof footprint and pitch, with squares and project cost.

Outdoor & Garden

Paver Calculator

Free paver calculator counts patio or driveway pavers, sand base and joint sand, with cost estimates for any paver size.

Gravel Calculator

Free gravel calculator estimates gravel volume in cubic meters and weight in tonnes for driveways, paths and gardens. Enter area, depth and material type.

Fence Calculator

Free fence calculator plans wood or chain link fences: posts, rails, panels and total cost from your property line dimensions.

Deck Calculator

Free deck calculator estimates decking boards, joists, fasteners and material cost from your deck area and board dimensions.

Garden Mulch Calculator

Free mulch calculator estimates garden bed mulch volume, bags and cost, and compares bagged vs bulk prices. Enter bed size and depth for bark or wood chips.

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