Calculator hub
Interior calculators and guides
Measure rooms and surfaces for paint, flooring, tile, grout, self-leveling compound, door casing, crown molding, drywall scope, waste, cartons, and local cost assumptions.
8 calculators · 4 published guides
Free planning calculators · No account required · Visible assumptions · Browser-based
Calculators
Start with the measured material
Area
Square Footage Calculator
Measure rooms, floors, walls, and multi-area projects.
Coverage
Paint Calculator
Plan room walls, ceilings, known surfaces, and local paint purchases.
Materials
Tile Calculator
Estimate tile size, box quantity, pattern allowance, and purchase cost.
Materials
Flooring Calculator
Plan flooring cartons, product coverage, underlayment rolls, and budget.
Interior Trim
Door Casing Calculator
Plan mitered or craftsman door trim before purchasing and cutting stock.
Interior Trim
Crown Molding Calculator
Plan room crown molding quantities before ordering stock and laying out cuts.
Tile Materials
Tile Grout Calculator
Plan grout and setting-material purchases for floor, wall, backsplash, and shower tile.
Floor Preparation
Self-Leveling Concrete Calculator
Plan floor-leveling compound and primer before tile or flooring installation.
Published guides
Check the inputs and assumptions
Drywall guide
Cost to Drywall a 12x12 Room: Area, Sheets, and Finish Scope
Use a 12x12 room example to calculate drywall area, whole sheets, visible assumptions, and the project scope that changes material and labor cost.
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Painting guide
Cost to Paint a 12x12 Room: Wall Area, Coats, and Scope
Use a 12x12 room example to estimate paintable area, gallons, coats, prep scope, and cost assumptions without hiding product coverage.
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Tile guide
Bathroom Tile Cost: Floor, Shower, Waste, and Waterproofing Scope
Measure bathroom tile surfaces separately, add waste and box rounding, then keep waterproofing, substrate repair, setting materials, and labor visible.
Read guide
Flooring guide
Flooring Cost per Square Foot: Area, Waste, Cartons, and Scope
Compare flooring cost by using measured area, waste allowance, carton coverage, material choice, subfloor condition, and local installation scope.
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