Tile Size Converter
Convert tile length, width and coverage between imperial and metric units. Enter one tile size in inches, feet, millimetres, centimetres or metres to see equivalent dimensions, area in square feet and square metres, tiles per square foot, tiles per square metre and optional carton coverage.
Tile Dimension Converter
Metric & ImperialTranslate Tile Dimensions Without Guessing
Tile packaging, architectural drawings and retailer listings may use different units. A converter places every dimension and coverage value on a common basis so products can be compared accurately.
Inches
Common for nominal tile sizes such as 12×12, 12×24 and 24×24.
Millimetres
Common for metric products such as 300×600, 600×600 and 600×1200.
Centimetres
Useful for smaller mosaics, wall tiles and quick metric comparisons.
Feet
Useful when matching tile coverage with room measurements in square feet.
Metres
Useful for large slabs and area calculations expressed in square metres.
Coverage
Tile area multiplied by pieces per box estimates nominal carton coverage.
Convert Tile Length, Width and Area
Enter tile length and width using the same unit, then select that unit from the menu. The converter changes both dimensions into inches, feet, millimetres, centimetres and metres. It also multiplies converted length by converted width to calculate coverage per tile.
A nominal 12×24-inch tile converts to approximately 304.8×609.6 millimetres or 30.48×60.96 centimetres. Its mathematical area is about two square feet or 0.1858 square metres before allowing for manufacturing tolerances, chamfers, joints or package rounding.
Inches to millimetres: inches × 25.4. Millimetres to inches: millimetres ÷ 25.4. Tile area: converted length × converted width. Box coverage: tile area × pieces per box.
Length Conversion and Area Conversion Differ
Linear dimensions use one conversion factor, while area uses the factor twice. One foot equals 0.3048 metres, but one square foot equals approximately 0.092903 square metres. Converting the two tile sides first and multiplying them avoids a common area error.
Nominal Size Versus Actual Size
A product described as 12×24 inches may have slightly different actual dimensions. Manufacturers can use nominal naming for a size family while the physical tile is designed around a grout module. Use measured or published actual dimensions for precise layout planning.
Include Complete Mosaic Sheets
For mesh-mounted mosaics, enter the outside length and width of one complete sheet, not one chip. Individual chip dimensions help with design decisions, but the sheet controls coverage, quantity and box calculations.
Mathematical area supports comparison, but current square-foot or square-metre coverage printed on the carton should guide the purchase.
Keep Length and Width in One Unit
Do not enter length in inches and width in centimetres under one selection. Convert one dimension first or choose the unit matching both values. Mixed inputs create an incorrect tile area and every quantity based on it.
Common Tile Measurement Relationships
These fixed relationships support accurate conversion between imperial and metric product labels.
1 inch
Exactly 25.4 millimetres or 2.54 centimetres.
1 foot
Exactly 12 inches, 304.8 millimetres or 0.3048 metres.
1 square foot
Approximately 0.092903 square metres.
1 square metre
Approximately 10.7639 square feet.
Use Tile Area to Estimate Quantity
Once area per tile is known, project area can be divided by that value to estimate the mathematical number of pieces. Always round upward to whole tiles, add waste and then round again to complete boxes.
Tiles per Square Foot
Divide one square foot by the tile’s square-foot area. A 12×12-inch tile mathematically equals one tile per square foot. A 6×6-inch tile covers one-quarter square foot, so four pieces cover one square foot before joints and waste.
Tiles per Square Metre
Divide one square metre by tile area in square metres. A 600×600-millimetre tile covers 0.36 square metres, so approximately 2.78 tiles cover one square metre before whole-piece rounding.
Comparison Area
The converter can compare the entered tile against one or ten square feet or square metres. The result shows the mathematical piece count for that area, helping users understand the scale of small mosaics, standard tiles and large slabs.
Grout Joints and Coverage
Quantity calculators commonly use tile or carton coverage rather than subtracting grout joints from room area. Joint spacing affects layout dimensions and grout quantity, while package coverage generally reflects the manufacturer’s intended module.
Cut Pieces Still Consume Tiles
A half tile at one edge may create an offcut usable elsewhere, but reuse is not guaranteed. Tile density provides a base quantity only. Room shape, pattern, cuts, breakage and repair stock determine the final order.
Why Similar Labels May Not Mean Identical Tiles
Metric and imperial labels are often treated as equivalents for merchandising, but converted dimensions may not match exactly. A 300×600-millimetre tile is approximately 11.81×23.62 inches, not exactly 12×24 inches.
Do Not Mix Near-Matching Sizes Automatically
Tiles with similar labels can differ enough to disrupt grout lines, patterns and modular layouts. Do not combine 300×600-millimetre material with nominal 12×24-inch material unless the actual dimensions, thickness, edges and manufacturer guidance confirm compatibility.
Calibre and Manufacturing Variation
Some fired products are sorted into calibre groups because final dimensions vary slightly. Compare carton labels across the complete order. Even products from the same collection can require consistent calibre for aligned joints.
Rectified and Pressed Edges
Rectified tiles are mechanically finished for more consistent dimensions, while pressed-edge products may have rounded or tapered sides. Edge type can influence practical joint width and the difference between face measurement and installation module.
Thickness Is a Separate Measurement
This converter focuses on length, width and area. Tile thickness affects transitions, trim profiles, floor height and handling, but it does not change face coverage. Convert thickness separately when coordinating adjacent materials.
Pattern Modules
Modular patterns combine two or more tile sizes in fixed ratios. Converting each tile independently does not establish the percentage of each size required. Use a pattern-specific calculator or the manufacturer’s module diagram.
Before using converted values for an order confirm actual tile dimensions complete mosaic-sheet size manufacturer carton coverage pieces per box calibre thickness edge type grout module pattern compatibility shade code and available matching stock. Use one measurement unit for both entered sides and keep linear conversions separate from square-area conversions. A product label may show a convenient nominal size while the physical tile follows a different installation module, so verify current technical data before mixing products or planning precise joints. Before using converted values for an order confirm actual tile dimensions complete mosaic-sheet size manufacturer carton coverage pieces per box calibre thickness edge type grout module pattern compatibility shade code and available matching stock. Use one measurement unit for both entered sides and keep linear conversions separate from square-area conversions. A product label may show a convenient nominal size while the physical tile follows a different installation module, so verify current technical data before mixing products or planning precise joints. Before using converted values for an order confirm actual tile dimensions complete mosaic-sheet size manufacturer carton coverage pieces per box calibre thickness edge type grout module pattern compatibility shade code and available matching stock. Use one measurement unit for both entered sides and keep linear conversions separate from square-area conversions. A product label may show a convenient nominal size while the physical tile follows a different installation module, so verify current technical data before mixing products or planning precise joints. Before using converted values for an order confirm actual tile dimensions complete mosaic-sheet size manufacturer carton coverage pieces per box calibre thickness edge type grout module pattern compatibility shade code and available matching stock. Use one measurement unit for both entered sides and keep linear conversions separate from square-area conversions. A product label may show a convenient nominal size while the physical tile follows a different installation module, so verify current technical data before mixing products or planning precise joints. Before using converted values for an order confirm actual tile dimensions complete mosaic-sheet size manufacturer carton coverage pieces per box calibre thickness edge type grout module pattern compatibility shade code and available matching stock. Use one measurement unit for both entered sides and keep linear conversions separate from square-area conversions. A product label may show a convenient nominal size while the physical tile follows a different installation module, so verify current technical data before mixing products or planning precise joints. Before using converted values for an
Confirm actual dimensions, carton coverage, calibre, thickness, edge type, shade and pattern compatibility before combining products or ordering.
Quick Tile Size Examples
Values below are mathematical conversions. Product names and actual manufactured dimensions may differ.
12×12 inches
304.8×304.8 mm and approximately 0.0929 m² per tile.
12×24 inches
304.8×609.6 mm and approximately 0.1858 m² per tile.
24×24 inches
609.6×609.6 mm and approximately 0.3716 m² per tile.
300×600 mm
Approximately 11.81×23.62 inches and 0.18 m² per tile.
600×600 mm
Approximately 23.62×23.62 inches and 0.36 m² per tile.
600×1200 mm
Approximately 23.62×47.24 inches and 0.72 m² per tile.
Common Questions About Tile Dimensions
These answers cover inches, millimetres, area, box coverage, nominal sizes, mosaics and metric-to-imperial matching.
How do I convert tile inches to millimetres?
Multiply each inch measurement by 25.4. Convert length and width separately before calculating area.
What is a 12×24 tile in millimetres?
The exact mathematical conversion is 304.8×609.6 millimetres, although the actual manufactured tile may differ.
Is 300×600 mm the same as 12×24 inches?
No. It is close, but 300×600 millimetres equals approximately 11.81×23.62 inches.
How do I calculate area per tile?
Convert length and width into the same unit, then multiply them. Use feet for ft² or metres for m².
How many 600×600 tiles cover one square metre?
One tile covers 0.36 m², so approximately 2.78 tiles cover one square metre before rounding and waste.
How do I calculate box coverage?
Multiply area per tile by the number of tiles in one box, then compare with the carton’s listed coverage.
Should I enter one mosaic chip or the sheet?
Enter the full sheet dimensions for coverage calculations. Chip size alone does not represent the purchasable unit.
Does grout width change tile size?
No, but it changes the installation module and layout. Use a layout calculator when joint spacing matters.
Can similar metric and imperial tiles be mixed?
Only after confirming actual dimensions, thickness, edges, calibre and manufacturer compatibility.
How accurate is the converter?
The mathematical conversions are precise, but nominal product names, manufacturing tolerances and listed carton coverage can differ.
Convert the Tile Before Calculating Quantity
Compare dimensions, area, tile density and box coverage, then verify the actual product label before ordering.