Walls, floors & finishes
Surface calculators for paint, flooring, tile and drywall.
Calculate paint, flooring, carpet, tile, grout, drywall, insulation, and wallpaper quantities with editable product coverage and waste.
Surface estimates begin with net area, but the purchase quantity depends on coats, layout, packaging, pattern matching, seams, and product-specific coverage. Keep those choices visible instead of hiding them inside a flat percentage.
Paint Coverage CalculatorEstimate wall and ceiling paint with coats, doors, windows, and waste included.Flooring CalculatorPlan flooring area, cartons, and a sensible cutting allowance.Carpet CalculatorEstimate carpet area, roll length, seams, and a practical installation allowance.Tile CalculatorEstimate tiles by room and tile size, including grout joints and overage.Grout CalculatorEstimate grout coverage from tile dimensions, thickness, and joint width.Drywall Sheet CalculatorWork out sheet count for walls and ceilings with openings deducted.Drywall Compound CalculatorPlan joint compound for taping, finishing, and a chosen finish level.Insulation CalculatorEstimate insulation area and package count for walls and ceilings.Wallpaper Roll CalculatorEstimate single and double rolls while accounting for pattern repeat.Thinset Mortar CalculatorEstimate tile mortar packages from area, applications, and product coverage.Trim & Molding CalculatorEstimate linear trim and stock pieces from room perimeter and doorways.Epoxy Floor CalculatorEstimate epoxy coating kits from floor area, coats, and labeled coverage.Sealant & Caulk CalculatorEstimate cartridges from joint length, width, depth, and package volume.
Before calculating
Three checks for a better estimate.
01Measure net coated area
Paint and sheet products can deduct appropriate openings, while wallpaper and carpet may still need full drops or strips around them.
02Enter the package coverage
Cartons, packs, pails, and rolls vary by product. Replace every example coverage with the selected label.
03Let the layout set waste
Straight layouts in regular rooms usually need less overage than diagonal patterns, narrow cuts, complex seams, or strong repeats.