Tile Calculator

Count floor or wall tiles from the area, tile size and grout joint, with extra for cuts.

Tiles needed

87

  • Area80 ft²

Estimates only. Round up when you order, and confirm structural details with your local building code.

How to use it

  1. Enter area dimensions.
  2. Enter tile size and grout joint.
  3. Pick straight or diagonal layout.
  4. Optionally enter tiles per box.

The formula

Tiles = area ÷ ((tile length + joint) × (tile width + joint)) × (1 + waste)

Worked example

Area length10 ft
Area width8 ft
Tile length12 in
Tile width12 in
Grout joint0.125 in
Tiles per box (optional)0
LayoutStraight (10% waste)

Result

Tiles needed87
Area80 ft²

Tips before you order

  • Keep a few spare tiles from the same lot for future repairs.
  • Large-format tile (15 in and up) needs a flatter substrate and a larger trowel notch.

Questions

How much extra tile should I buy?

About 10% for straight layouts and 15% for diagonal or herringbone patterns.