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Tile Calculator

Estimate the number of tiles and full boxes required for a floor or wall, including a cutting and breakage allowance.

Calculate Tiles and Boxes

Straight layouts often need less waste than diagonal layouts or rooms with many corners.

Tiles = Area ÷ Tile Area × (1 + Waste %); Boxes = Ceiling(Tiles ÷ Tiles per box)

A 25 m² area with 60 × 60 cm tiles needs about 70 tiles before waste. At 10% waste, plan for 77 tiles, or 20 boxes when each box contains four tiles.

Measure the project carefully, use the effective product dimensions or coverage supplied by the manufacturer, add a realistic allowance, and round purchasing quantities up to saleable units.

Use this estimate before requesting quotations, comparing suppliers, preparing a budget, or checking whether delivered quantities match the planned project.

Do not mix units, use nominal dimensions where effective coverage is required, or treat a planning estimate as a structural specification.

Worked Example

A 25 m² area with 60 × 60 cm tiles needs about 70 tiles before waste. At 10% waste, plan for 77 tiles, or 20 boxes when each box contains four tiles.

Buying tip: Round up to the supplier’s available pack, bag, sheet, can, truck, or batch size after confirming the product specification.

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When to Use It

  • Floor and wall tiling
  • Comparing tile sizes
  • Box quantity planning
  • Budget estimates
  • Keeping spare replacement tiles

How It Works

  • Measure the real project dimensions.
  • Enter effective product coverage and waste.
  • Review and round the result to purchasable quantities.

Common Mistakes

  • Not subtracting large permanent openings
  • Using box coverage from a different tile size
  • Ignoring cuts around corners and fittings
  • Buying mixed batches with colour variation

Materials and Tools to Compare

  • Floor or wall tiles
  • Tile adhesive
  • Grout and spacers
  • Tile cutter and levelling clips

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Frequently Asked Questions

How much tile waste should I add?

About 7\u201310% is common for simple straight layouts. Diagonal patterns, many corners, fragile tiles, or future spare stock may justify 12\u201315% or more.

Should I buy whole boxes?

Yes. The calculator rounds boxes up because suppliers normally sell sealed full boxes.

Do grout joints change the estimate?

They can slightly reduce tile count, but the waste allowance usually covers the difference for normal joints. Large-format or patterned work should be laid out carefully.

Can I use this for wall tiles?

Yes. Enter the net wall area after subtracting major doors, windows, or openings.

Why keep spare tiles?

A few matching tiles help with future repairs because later production batches may differ in shade or finish.

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