120×20 cm Tile Calculator & Layout Planner

Enter your room dimensions in Step 1 to generate a customized 120×20 cm layout with precise cut calculations and carton estimates in Step 2.

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Coverage & Packaging Reference (120 × 20 cm)

Calculated with standard cartons of 5 tiles per box (1.2 m²/box) and 10% cutting allowance.

Room Area (m²)	Net Tiles	Total (+10% Waste)	Boxes to Buy	Purchased Area (m²)
5 m²	21 tiles	24 tiles	5 boxes	6 m²
10 m²	42 tiles	47 tiles	10 boxes	12 m²
15 m²	63 tiles	70 tiles	14 boxes	16.8 m²
20 m²	84 tiles	93 tiles	19 boxes	22.8 m²
25 m²	105 tiles	116 tiles	24 boxes	28.8 m²
30 m²	125 tiles	138 tiles	28 boxes	33.6 m²

Attic Stock Recommendation: Trade practice recommends ordering 1 extra unopened box (1.20 m²) to preserve wood-look grain dye lots for future floor repairs.

Craftsman Trade Advice

Essential technical rules from master tilers for durable tile installations.

Substrate Prep

Floor Flatness for Long Narrow Planks

Long 120×20 cm wood planks require an exceptionally flat substrate. Even a 2 mm hollow creates noticeable edge lippage. Pour self-leveling compound across unlevel screeds before setting planks.

Sightline

Lay Planks in Main Viewing Direction

Orient planks running lengthwise down the room toward the main window light. This replicates traditional hardwood flooring sightlines and makes narrow rooms appear wider.

Joint Physics

1/4 Running Offset & Anti-Lippage Clips

Always install 120 cm planks in a 1/4 (25%) running offset. Never use a 50% half-drop brick pattern. Use mechanical leveling clips to hold plank ends flush while thinset cures.

Frequently Asked Questions

How many 120×20 cm tiles are in one square meter?

There are exactly 4.17 tiles of 120×20 cm in one square meter. Factoring in a 2 mm joint and 10% cutting waste, plan for 4.65 tiles per square meter.

Can 120×20 cm tiles be laid in a 50% brick bond pattern?

No, 120×20 cm planks should never be laid in a 50% brick bond pattern. Due to center crowning during kiln cooling, 50% staggering creates noticeable lippage. Use a 1/4 or 1/3 offset instead.

What grout joint width should I use for 120×20 cm tiles?

Use a 2 mm grout joint width with grout color closely matched to the wood grain tone. Narrow color-matched joints create the visual illusion of a continuous hardwood timber floor.

Are 120×20 cm tiles suitable for floors or walls?

While 120×20 cm tiles are primarily engineered as durable floor planks, they are frequently used on accent bathroom walls and shower niches to create spa-inspired wood feature walls.

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