How to measure your rooms and work out what to buy, with the math shown.
A 12×12 room with 8-foot ceilings needs about 2 gallons of wall paint for two coats, plus about 1 gallon if you paint the ceiling. Here's the math.
Work out wall area, subtract doors and windows, multiply by coats and divide by coverage. A step-by-step paint calculation with examples.
Measure square footage, add waste, divide by the square feet per box and round up. Worked examples for laminate, vinyl plank and tile.
Multiply length by width for a rectangle. For L-shaped and odd rooms, split them into rectangles and add them up. Step-by-step with examples.
Buy 5–10% extra for straight layouts and 15% or more for diagonal and herringbone. Why waste happens and how to pick the right number.
Measure the room's perimeter, subtract door openings, add about 10% for cuts, and divide by the board length. Worked example included.
Do the math for your own roomsSquarely works out floor area, paint, flooring boxes, baseboard and cost. Free, no sign-up.