Interior Projects Calculators
Paint, drywall, flooring and tile for indoor rooms and surfaces.
8 free tools — instant results, no sign-up.
Available calculators
Paint CalculatorGallons of paint for any room or wall.Drywall CalculatorSheets of drywall for walls and ceilings.Flooring CalculatorBoxes of laminate, vinyl plank or hardwood.Tile CalculatorTiles and boxes for floors, walls and showers.Carpet CalculatorSquare yards and rolls of carpet for any room.Insulation CalculatorBatts or rolls of insulation for walls and attics.Paint Cost CalculatorGallons of paint and estimated material cost.Flooring Cost CalculatorBoxes of flooring and estimated material cost.
Popular project use cases
- Painting a bedroom, living room or whole interior
- Hanging drywall on walls and ceilings
- Installing laminate, vinyl plank, hardwood or tile
- Insulating an attic, wall or ceiling
Choosing the right calculator
- Paint and Drywall calculators deduct doors and windows for you.
- Flooring and Tile need the coverage per box printed on the label.
- For a budget, pair the material calculator with its Cost counterpart (Paint Cost, Flooring Cost).
- Insulation needs the coverage per package for your chosen R-value.
Good to know
Cost vs quantity: each material calculator tells you how much to buy; the matching Cost calculator multiplies by your price per unit for a budget.
Interior Projects FAQs
How much paint do I need for a room?
One gallon covers about 350–400 ft². A 12×12 room with 8 ft walls needs roughly 2 gallons for two coats. Use the Paint Calculator for an exact number.
How much waste should I add for flooring or tile?
10% for straight-lay in a simple room, 15% for angled rooms or many cuts, and 20%+ for diagonal or herringbone patterns.
Other categories
Concrete & MasonryConcrete volume, bag counts and pavers for slabs, footings and patios.LandscapingMulch, gravel, topsoil and sod for yards, beds and lawns.Roofing & ExteriorShingle bundles and squares for roof replacements.Outdoor ProjectsFence and deck board material lists for outdoor builds.MeasurementsSquare footage and area conversions — the starting point for every estimate.