Tile Estimator Calculator
Input your room dimensions and tile specs to calculate exactly how many tiles you need to purchase for your renovation project.
Tile & Floor Estimator
Room Dimensions
Tile Specs
10% standard, 15% for diagonal layouts or complex rooms.
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How to Calculate Flooring and Wall Tiles
When ordering tile for a bathroom floor, kitchen backsplash, or any other home improvement project, buying exactly the mathematical area of the room is a huge mistake. Real layouts require tiles to be cut, resulting in waste and unusable scraps.
The Layout Math
First, calculate the total square footage of the room by multiplying length (in feet) by width (in feet). Next, calculate the size of a single tile in square feet.
For example, a standard 12"x24" tile is 1 foot by 2 feet, which equals 2 square feet per tile. A 100 square foot room divided by 2 square feet means you need an absolute minimum of 50 perfect tiles.
Grout Joint Gap
Grout lines might look small, but over a massive room, an eighth-inch gap on every single tile adds up to several square feet of area! If your room requires hundreds of small subway tiles, factoring the grout space into the area calculation will prevent you from vastly over-ordering material.
Understanding the Waste Factor
You must always over-order. The standard industry rule of thumb is:
- 10% Waste Factor: For standard rooms with straight, inline, or simple brick-joint tile patterns.
- 15% Waste Factor: A much safer bet for complex rooms with many corners, toilets to cut around, or if you are doing a complex diagonal/herringbone layout pattern that requires many custom cuts.
- Always keep spares: You should always have at least half a box of tiles leftover. Store them in the garage in case a tile cracks three years later and that exact color/dye-lot is discontinued by the manufacturer!