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Tile Quantity – Boxes, Cuts & Spare Tiles

Quick answer

End-to-end tile order: net area, 10-15% cutting allowance, box conversion and 1 spare box kept for future repairs after install.

Figures are estimates from this calculator’s standard formula — adjust the inputs in the tool below for your exact number.

How does the tile quantity calculator work?

Order = Area × (1 + Waste) ÷ Tiles per Box

This tool applies the formula Order = Area × (1 + Waste) ÷ Tiles per Box directly to the measurements you enter, so the result is an exact quantity rather than a rough guess. Because tile quantity is priced and delivered per unit - cubic meters, square meters, bags or tonnes - a small measurement error multiplies across the entire order, which is why the calculation is worth doing properly. Worked example: 18 m² bathroom floor, 60 × 60 (4/box), 12% waste: 18 × 1.12 ÷ 1.44 = 14 boxes. One note from practice: Keep one unopened box as attic stock - tile calibers vanish in 2-3 years. Enter the area, tile size and pattern complexity, check the totals, then round up to the nearest whole bag, sheet or roll before you place the order.

  1. 1

    Take dimensions

    Note the area, tile size and pattern complexity for the area you are covering or filling.

  2. 2

    Run the calculation

    The calculator applies Order = Area × (1 + Waste) ÷ Tiles per Box the moment you type.

  3. 3

    Check the breakdown

    Compare base quantity and waste-adjusted totals side by side.

  4. 4

    Plan the purchase

    Use the final figure to price and schedule the delivery.

Use Cases

Diagonal layouts

Raise tile quantity waste to 15% for diagonal patterns.

Paver patios and driveways

Base, sand and unit counts for tile quantity at 5 cm bedding.

Carpet and roll goods

Seam planning for tile quantity from standard roll widths.

Common Mistakes

  • Acclimation skipped

  • Forgetting underlayment

  • Small remaining boxes left

FAQs

Tile boxes for a 12 m² bathroom?

60 × 60 format: 12 × 1.1 ÷ 1.44 ≈ 10 boxes; 30 × 60 (8/box, 1.44 m²) comes to the same 10.

How many cut tiles per room?

Expect 5-8% cuts lost per room - that is why the 10% waste rule exists on top of breakage.

Should I buy a spare box?

Yes - one extra box covers future cracks and plumbing access repairs for a decade.

Diagonal layout quantity?

15% waste instead of 10 - each border tile needs two 45° cuts.

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