Tile Sizes and Coverage — Complete Reference Guide

Tile coverage depends on tile size. Larger tiles cover more area per piece; smaller tiles require more cuts. Here's a complete reference for all common tile sizes and their coverage rates.

Coverage by tile size

Tile size	Tiles per sq ft	Sq ft per tile	For 100 sq ft	For 200 sq ft
2×2 inch	36	0.028	3,960	7,920
4×4 inch	9	0.11	990	1,980
4×12 inch	3	0.33	330	660
6×6 inch	4	0.25	440	880
6×12 inch	2	0.50	220	440
12×12 inch	1	1.0	110	220
12×24 inch	0.5	2.0	55	110
16×16 inch	0.56	1.78	62	124
18×18 inch	0.44	2.25	49	98
24×24 inch	0.25	4.0	28	56
36×36 inch	0.11	9.0	12	24

Counts include 10% waste factor.

Recommended waste by pattern

Pattern	Waste to add
Straight (grid)	10%
Running bond (brick)	10%
Diagonal (45°)	15%
Herringbone	15%
Complex / custom	20%

Grout joint sizes by tile type

Tile type	Recommended joint
Mosaic (2” and smaller)	⅛”
Small field tile (4”–6”)	⅛”–3/16”
Standard tile (12”)	⅛”–¼”
Large format (18”+)	3/16”–¼”
Rectified tile (precision cut)	1/16”–⅛”

Common room tile estimates

Room	Typical size	12×12 tile count	12×24 tile count
Small bath (5×8)	40 sq ft	44 tiles	22 tiles
Standard bath (8×10)	80 sq ft	88 tiles	44 tiles
Kitchen floor	120 sq ft	132 tiles	66 tiles
Master bath floor	100 sq ft	110 tiles	55 tiles
12×12 room	144 sq ft	158 tiles	79 tiles

All counts include 10% waste.

How to calculate boxes

Measure room area (sq ft)
Add waste % → adjusted area
Check box label for sq ft per box
Divide adjusted area ÷ sq ft per box
Round up to the nearest whole box

Use the Tile Calculator to automate this calculation.

Frequently Asked Questions

How many tiles do I need per square foot?

It depends on tile size. A 12×12" tile covers exactly 1 sq ft (1 tile per sq ft). A 6×6" tile takes 4 tiles per sq ft. A 24×24" tile covers 4 sq ft (0.25 tiles per sq ft).

What is the most popular tile size?

12×24 inch tiles are currently the most popular floor tile size for modern interiors. For small bathrooms and showers, 12×12 and 6×6 inch tiles remain very common.

How much extra tile should I buy?

Buy 10% extra for standard installations. Add 15% for diagonal patterns and 20% for complex patterns or irregularly shaped rooms. Small tiles (mosaics) have more joints and cuts — buy 10–15% extra.

What grout joint size should I use?

Most floor tiles use ⅛" to ¼" joints. Rectified tiles (precisely cut) can use 1/16" joints. Wall tiles often use 1/16" to ⅛". Larger tiles typically use wider joints for alignment flexibility.

How many boxes of tile do I need?

Find the square footage per box on the box label. Divide your total area (plus waste %) by the box coverage. For example: 150 sq ft room, 10% waste = 165 sq ft ÷ 12 sq ft/box = 14 boxes.