Method
How to use this calculator
- 01
Enter room length and width in feet.
- 02
Enter nominal tile dimensions and planned grout joint in inches.
- 03
Add waste and optional tiles per box.
- 04
Review the centered edge cuts and dry-lay the actual tile before installation.
Good for
Useful planning situations
- Ceramic or porcelain rooms
- Centered rectangular tile fields
- Estimating boxes before purchase
Working model
Assumptions
- The room and tiles are rectangular.
- A centered layout uses equal cuts at opposing walls.
- Quantity uses nominal tile face area; layout pitch includes the grout joint.
Before ordering
Limits and checks
- Tile caliber, lippage, movement joints, niches, and obstacles are not modeled.
- Border patterns and diagonal grids need a separate layout.
- Coverage printed on the box is more authoritative than nominal dimensions.
Field notes
Frequently asked questions
Does grout width increase tile quantity?
The quantity estimate is based on tile face area, while grout width affects the row and column layout. Always compare against box coverage.
What is a centered edge cut?
It is the approximate equal cut at each opposing wall when the tile grid is centered in the available room dimension.
Should I order by tiles or boxes?
Order by the product’s sell unit. When tiles per box is entered, this tool rounds the estimate to full boxes.