Interior & Renovation Calculators
Fit out and refurbish any room with our free interior renovation calculators. Estimate drywall and insulation for walls and ceilings, measure up countertops, and work out crown molding, skirting and trim lengths with the right number of lengths and mitre cuts.
Every tool includes a waste allowance and supports both metric and imperial units, making it easy to plan a renovation from bare walls to finished trim.
Interior Calculators(8)
Drywall Calculator
Work out drywall sheets plus jointing tape, compound and screws for walls and ceilings.
Plaster Calculator
Estimate how much plaster you need for walls and ceilings, the number of bags and the total cost in metric or imperial units.
Insulation Calculator
Calculate the amount of insulation rolls, batts, or boards needed for walls, floors and lofts.
Countertop Calculator
Calculate the area and cost estimate for kitchen or bathroom countertops.
Crown Molding / Coving Calculator
Calculate crown molding or coving length, number of pieces, inside and outside corners for any room.
Baseboard / Skirting Board Calculator
Calculate baseboard or skirting board length needed for any room, accounting for doorways and corners.
Paint Calculator
Calculate how much paint you need for walls, ceilings and trim based on room dimensions.
Wallpaper Calculator
Calculate the number of wallpaper rolls needed for any room, accounting for pattern repeat.