Interior finishes calculators
Paint, tile, drywall, grout and trim. Every calculator on this page returns a purchase ready quantity with the waste allowance shown and the working visible.
Drywall Calculator
Work out how many drywall sheets a room needs, plus the joint compound, tape and screws, from the wall and ceiling area.
Open calculator →Tile Calculator
Calculate how many tiles and how many boxes a floor or wall needs, with the right waste factor for a straight or diagonal layout.
Open calculator →Paint Calculator
Work out how many gallons of paint a room needs, with doors and windows deducted, coats counted and the ceiling costed separately.
Open calculator →Grout Calculator
Estimate grout and thinset from tile size, joint width and joint depth, with the right trowel notch for the tile you are setting.
Open calculator →