Flooring Area Calculator
Installing new flooring.
Tile Calculator - How Many Tiles You Need
Work out exactly how many tiles your floor or wall project needs with our Tile Calculator. Enter the room dimensions, your tile size in inches, and a waste factor — the calculator returns the total tile count plus the coverage area in square feet.
The waste factor accounts for cuts, breakage, and future repairs. Standard straight layouts need about 10%, diagonal and herringbone patterns 15%, and small or irregular rooms up to 20%. Buying a few extra tiles is cheap insurance compared to hunting a discontinued style later.
Tile count scales inversely with tile size: a 12×12 inch tile covers one square foot, while 6×6 inch tiles need four per square foot. Use the calculator to compare layouts and sizes before you buy, and to check whether boxes of different brands will cover the same area.
Công thức
tiles = ceil( area (sq ft) × 144 ÷ (tile L × tile W) × (1 + waste%) )
Câu hỏi thường gặp
How many tiles do I need for my room?
Multiply room length × width to get the area in square feet, convert the tile size to square inches (144 sq in = 1 sq ft), divide, then add your waste factor. The calculator does all of this instantly.
What waste factor should I use for tiles?
Use 10% for standard straight layouts, 15% for diagonal or herringbone patterns, and up to 20% for small rooms with many cuts. Leftover tiles are useful for future repairs.
How do I calculate tiles per square foot?
Divide 144 by the tile area in square inches (length × width). A 12×12 inch tile covers 1 sq ft exactly; a 6×6 inch tile needs 4 tiles per square foot.
Do tile size and layout affect the count?
Yes. Larger tiles mean fewer cuts and less waste, while diagonal patterns increase cuts. The room shape matters too — irregular rooms need a higher waste factor.