Material estimator

Tile Calculator

Calculate floor or wall tile count, boxes, waste, grout-adjusted coverage, and estimated material cost.

How This Calculator Works

Tile ordering depends on the room area, tile size, grout joints, layout waste, and box quantity. This calculator converts those details into tiles and boxes.

Formula

Tile count = project area / tile area, adjusted for grout spacing and waste, then rounded up.

Assumptions

The calculator estimates field tile. Borders, accent strips, stairs, breakage from difficult cuts, and dye-lot matching may require extra material.

Example

A 120 sq ft room using 12 in by 24 in tiles with 10% waste needs about 66 tiles. If there are 8 tiles per box, buy 9 boxes.

Before You Buy

Tile waste should be higher for diagonal layouts, borders, niches, stairs, and fragile materials.
Buy all tile from the same dye lot when possible; matching later can be difficult.
This estimates field tile only. Trim pieces, bullnose, accent strips, spacers, mortar, grout, and sealer are separate.

Common Questions

How much waste should tile have?

Use about 10% for simple layouts, 15% for diagonal layouts, and more for complex patterns or many cuts.

Does grout spacing affect tile count?

Yes, though usually slightly. This calculator adds grout spacing to each tile dimension for a practical coverage estimate.

Should I buy extra tile?

Yes. Extra tile protects against breakage, bad cuts, and future repair needs after a dye lot is discontinued.