How much extra tile should I buy?

Add 10% for straight layouts and 15% for diagonal or patterned installs.

How do I count tiles for walls?

Use the wall area instead of floor area and deduct large openings.

Enter the area and tile size to estimate the number of tiles, including a waste factor and optional cost.

Estimates only. Round up and buy a little extra to account for waste, spills, and breakage.

Tiles = area ÷ tile area, × (1 + waste%). Tile area = tile length × tile width ÷ 144.

How much extra tile should I buy?: Add 10% for straight layouts and 15% for diagonal or patterned installs.
How do I count tiles for walls?: Use the wall area instead of floor area and deduct large openings.

Estimate boxes of flooring with a waste factor for any room.

Calculate the area of a room or surface in square feet, yards, and meters.

Estimate gallons of paint by wall area, coats, and openings.

Estimate drywall sheets for walls and ceilings.