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Tile Calculator

Estimate tiles and full packs from area, tile size, grout and waste.

Your numbers

Make it your own
Updates as you type
Packs to buy
11packs

Calculated from your inputs · rounded for display

Net area100ft²
Area with allowance110ft²
Tiles required110tiles
Tiles purchased110tiles
Material cost$440.00

Area-based tile-and-grout module estimate, not a row-by-row cutting layout. Boundaries, patterns, edge cuts and breakage affect actual quantities. Verify layout before ordering.

Your calculation, step by step

No black boxes
  1. Net area = 100 − 0 = 100.
  2. With 10% allowance: 110 ft².
  3. Coverage per tile module (including grout) = 1.
  4. Divide adjusted area by coverage, then round up to whole packs: 11.

What if things were different?

Save up to three scenarios, then change your inputs to compare the possibilities.

How to use this calculator

  1. Enter your own values in the labeled fields. Check the units and assumptions before comparing results. Only the fields needed for your selected calculation mode are shown.
  2. Your answer updates automatically. Review the calculation steps to see exactly how it was calculated.
  3. Copy, share, save, or download your result. Saved inputs stay on this device.

How the calculation works

Tile module area = (tile length + grout) × (tile width + grout)

The model divides adjusted area by an approximate repeating tile-and-joint module. It rounds to whole tiles and then to whole packs. Use inches with square feet or millimeters with square meters. Border cuts, staggered patterns and room dimensions can change the actual count, so this is not a layout plan.

A worked example

For 100 ft², 12-by-12-inch tiles, zero grout and 10% allowance, allow 110 tiles. At 10 tiles per pack, buy 11 packs.

Reading your result

Use the main result together with its units and supporting figures. Display values are rounded; calculations keep their underlying precision. A change in inputs or assumptions can change the answer. Compare the step-by-step working with your intended use before relying on an estimate.

Frequently asked questions

Why does grout affect area coverage?

The repeated tile module includes a joint on each dimension. Room boundaries need a separate layout check.

Is this exact for patterned layouts?

No. Validate cutting and pattern allowances before ordering.

Sources & methodology

This calculator uses the mathematical identity and assumptions stated above. No current rates, prices, or external data are loaded. Conversion tools use international unit definitions.

Formula review: October 24, 2026. Read our methodology.