Subway Tile Calculator & Layout Planner

Enter your room dimensions in Step 1 to generate a customized subway tile layout with precise cut calculations and carton estimates in Step 2.

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Coverage & Packaging Reference (10 × 20 cm)

Calculated with standard cartons of 50 tiles per box (1 m²/box) and 10% cutting allowance.

Room Area (m²)	Net Tiles	Total (+10% Waste)	Boxes to Buy	Purchased Area (m²)
5 m²	250 tiles	275 tiles	6 boxes	6 m²
10 m²	500 tiles	550 tiles	11 boxes	11 m²
15 m²	750 tiles	826 tiles	17 boxes	17 m²
20 m²	1000 tiles	1100 tiles	22 boxes	22 m²
25 m²	1250 tiles	1375 tiles	28 boxes	28 m²
30 m²	1500 tiles	1651 tiles	34 boxes	34 m²

Attic Stock Recommendation: Trade practice recommends ordering 1 extra unopened carton (1.0 m²) to preserve identical dye lot glazes for future plumbing access or repairs.

Craftsman Trade Advice

Essential technical rules from master tilers for durable tile installations.

Substrate Prep

Moisture Barrier & Backsplash Substrate Prep

Behind kitchen cooktops and bathroom vanities, substrates must be moisture-resistant and primed with an acrylic bonding primer. Plumb studs and flat cement board prevent subway tile rows from undulating or twisting under directional cabinet task lighting.

Sightline

Centering on Cooktop & Vanity Focal Sightlines

Center the subway tile layout precisely on the room’s main visual anchor, such as the cooktop centerline or vanity mirror. Ensure alternating courses leave cuts wider than half a tile into inside corners rather than fragile slivers.

Joint Physics

Edge Trim Profiles & Countertop Movement Gaps

Terminate exposed backsplash flanks with anodized aluminum Jolly edge profiles. Never seal the bottom joint against kitchen countertops with rigid cement grout; apply 100% color-matched silicone over a foam backer rod to absorb house deflection.

Frequently Asked Questions

How many subway tiles are in one square meter?

For standard 10×20 cm subway tiles, exactly 50 tiles cover one square meter without joints. Factoring in a standard 2 mm joint and 10% cutting waste, plan for 55 tiles per square meter.

Can subway tiles be laid in a 50% brick bond pattern?

Yes, subway tiles are specifically designed for a classic 50% brick bond running offset. Because compact 10×20 cm or 3×6 inch tiles have negligible kiln crowning, overlapping corners against midpoints produces smooth, flush joints without lippage.

What grout joint width should I use for subway tiles?

A 2 mm to 3 mm grout joint width is standard for classic subway tiles. Pressed cushion-edge subway tiles require a 2.5 mm joint to absorb manufacturing tolerances, while rectified subway tiles can be set with a crisp 1.5 mm to 2 mm joint.

Are subway tiles suitable for floors or walls?

Traditional glazed ceramic subway tiles are designed strictly for vertical walls and backsplashes. However, dense porcelain subway tiles with an anti-slip matte glaze and sufficient thickness can be installed on light residential bathroom floors.

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