Tile Calculator

Calculate how many tiles you need for any floor or wall, plus thinset and grout estimates. Just enter your room size and tile dimensions.

How to Calculate Tile Quantity

The formula is: Room Area ÷ Tile Area = Number of Tiles. Measure room dimensions in feet, convert to inches, and divide. Always add 10% for cuts, breakage, and future repairs.

Coverage by Tile Size

12×12 tiles (12" × 12")

One tile = 1 sq ft. Easy math — a 200 sq ft room needs 200 tiles plus waste.

18×18 tiles

One tile = 2.25 sq ft. Popular for large rooms because grout lines are fewer.

6×6 tiles

One tile = 0.25 sq ft. Used in bathrooms and smaller spaces. More grout lines = more grout needed.

12×24 tiles

One tile = 2 sq ft. Popular for modern kitchens and bathrooms. Requires level substrate.

Frequently Asked Questions

How many tiles in a box?

Box contents vary by manufacturer. Common box sizes: 12×12 = 10–15 tiles per box; 18×18 = 6–8 tiles per box; 12×24 = 4–6 tiles per box. Always check the box label.

How much thinset do I need?

Plan on one 50 lb bag of thinset for every 30–50 sq ft of floor, depending on trowel size and tile thickness. Large-format tiles need more thinset per square foot.

How much grout do I need?

Grout quantity depends on tile size and joint width. Smaller tiles with wider joints need more grout. A 25 lb bag typically covers 50–200 sq ft depending on tile format.