Quick Calculators

Tile & Flooring Calculator

Calculate how many tiles (and boxes) you need to cover your floor or wall, including recommended waste overage.

Project Dimensions

Length
Width
Length
Width

Check your tile's box label. Leave blank to see tile count only.

Total Tiles Needed

0tiles

For 0 sq ft of total area

Includes 10% extra for cuts and breakage.

Enter your tiles-per-box count above to see the exact number of boxes to buy.

Last updated: July 2026

Why Calculate Tile with Waste?

Whether you're tiling a bathroom floor or a kitchen backsplash, simply measuring the square footage isn't enough. You will inevitably have to cut tiles to fit edges, corners, and around fixtures, which results in waste. Our tile calculator helps you determine exactly how many tiles you need, factoring in industry-standard waste margins so you don't run short mid-project.

How to Use This Tool

Enter the length and width of your project area, followed by the dimensions of the tiles you plan to use. Adjust the waste percentage based on your room's complexity (10% is standard, while 15% is recommended for rooms with many corners or diagonal layouts). Add your tiles-per-box count to see the exact number of boxes to buy.

Worked Example

Using the calculator's default numbers — a 10ft × 12ft room with 12" × 12" tiles and 10% waste:

  • Floor area = 10 × 12 = 120 sq ft
  • One tile = (12 × 12) ÷ 144 = 1 sq ft
  • Base tiles needed = 120 ÷ 1 = 120 tiles
  • With 10% waste: 120 × 1.10 = 132 tiles
  • If a box holds 10 tiles: 132 ÷ 10 = 14 boxes (rounded up)

Frequently Asked Questions

The industry standard is to add 10% for waste and cuts on simple rooms. If you are laying the tile on a diagonal or tiling a room with many angles and corners, increase the waste factor to 15%.
Yes, you should measure and subtract the square footage of any large, permanent fixtures like kitchen islands, base cabinets, or bathtubs that will not have tile underneath them.
Always keep at least half a box of leftover tiles. If a tile chips or cracks in the future, having a perfectly matched replacement from the same manufacturing batch is invaluable.
Enter how many tiles come in one box (check the box label or the product listing) into the 'Tiles Per Box' field, and the calculator will automatically convert your total tile count into a rounded-up box count.
Because you can't buy a fraction of a tile or a fraction of a box. The calculator always rounds up (never down) so you don't end up short mid-installation.
Yes, the same area-and-waste math applies to any tiled surface. Just enter the dimensions of the wall or backsplash area instead of a floor.
Break the space into rectangular sections, calculate the tile count for each section separately, then add the totals together. This is more accurate than trying to average an irregular shape into one length and width.