Interior & Renovation Calculators

Paint, tile, flooring and drywall — size the materials for an interior or renovation project.

CalcBooth’s interior calculators size the materials for a renovation room by room. The paint calculator works out how many gallons to cover the walls (and ceiling) for the number of coats you want, minus doors and windows. The tile calculator turns an area and a tile size into a tile count and boxes with the right waste allowance; the flooring calculator does the same for laminate, vinyl or hardwood by the box. The drywall calculator sizes sheets, joint compound, tape and screws for walls and ceilings, and explains the common thicknesses. Each tool shows the formula and adds a waste allowance so you buy the right amount the first time. These are planning estimates — confirm coverage and box sizes against your specific products before you buy.