Home Improvement

Tile Calculator

Estimate tile pieces and boxes from room size, tile dimensions, grout gap and waste.

FreeResult emailed + shownReviewed September 9, 2026
Home Improvement
Step 1

Enter your numbers

Method

How this tile calculator works

Surface area is converted to square inches and divided by the effective tile module (tile size plus grout gap). Waste is added, then pieces and boxes are rounded up.

How to use it

  1. Surface length. Enter the value in ft.
  2. Surface width. Enter the value in ft.
  3. Tile length. Enter the value in in.
  4. Tile width. Enter the value in in.
  5. Grout gap. Enter the value in in.
  6. Waste allowance. Enter the value in %.
  7. Request the result. Add your email, then select “Email & show my result.”

What to do with the number

Use piece count for layout planning and box count for purchasing. The formula is an area estimate, so edge cuts can still change real waste. Measure each separate wall or floor section when the space is irregular and add the totals before ordering.

Planning estimate

Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.

FAQ

Questions about this calculator

What does the Tile Calculator calculate?

Estimate tile pieces and boxes from room size, tile dimensions, grout gap and waste.

What inputs does this tile calculator use?

The calculator uses surface length, surface width, tile length, tile width, grout gap, waste allowance, tiles per box. You can replace every default with the numbers that match your situation.

How should I use the Tile Calculator result?

Use piece count for layout planning and box count for purchasing. The formula is an area estimate, so edge cuts can still change real waste.

What can make the real-world result different?

Measure each separate wall or floor section when the space is irregular and add the totals before ordering.

Can I change the calculator assumptions?

Yes. The editable inputs are the assumptions. Replace the default values with your own measurements, prices, rates, quantities, or specifications before requesting the result.