Large-format tiles
Tile weight per m² and per tile from thickness and density
- where
- tile weight per square metre (kg/m²)
- tile thickness (mm)
- density of the tile material (g/cm³)
- face area of one tile (m²)
- tile length and width (mm)
- weight of one tile (kg)
Explain this equation
Use this to find the weight of a tile per square metre and per piece, for checking wall backgrounds, planning lifts and loading vans.
t is the tile thickness and ρ the density of the body: about 2.35 g/cm³ for porcelain, 2.6–2.8 for granite and marble, lower for sandstone. At is the face area of one tile in m².
One millimetre of a material with density 1 g/cm³ weighs exactly 1 kg per m², so weight per m² is just thickness times density with no conversion. The per-tile weight is that figure times the face area; the 1 000 000 turns mm² into m².
A 20 mm outdoor porcelain slab weighs about 47 kg/m², so a 1200 × 600 slab is about 34 kg, above the HSE 25 kg guideline figure: a two-person lift. A 10 mm porcelain wall tile is about 23.5 kg/m² before adhesive, already over a gypsum plaster limit of 20 kg/m².
Watch out: add 3–5 kg/m² for adhesive and grout before comparing with a background limit.
Works out how heavy a tile is per square metre and per piece, for wall-load checks, handling and deliveries.
Enter your values to see the result.
Good to know
A 1 mm layer of material with density 1 g/cm³ weighs 1 kg per m², so weight per m² is simply thickness in mm times density in g/cm³. Typical densities: porcelain 2.3–2.5, granite and marble 2.6–2.8, limestone 2.7–2.8 (soft limestones less), slate 2.6–3.3, sandstone 2.1–2.4. Add adhesive and grout (about 3–5 kg/m²) before comparing with background limits: gypsum plaster 20 kg/m², plasterboard 32 kg/m².
Common mistake
Using the box weight per m² for one size and assuming it holds for a thicker or denser stone version of the same tile.
Limits
Nominal thickness only; ribbed or keyed backs weigh a little less. Use the manufacturer’s declared weight where given. HSE figures are guideline filters, not safe limits.
Sources
- Engineering ToolBox, Densities of solids (porcelain 2.3–2.5, granite 2.6–2.8, marble 2.6–2.8, limestone 2.7–2.8, slate 2.6–3.3, sandstone 2.1–2.4 × 10³ kg/m³)
- Porcelain tile technical data sheet (ISO 10545-2 flatness ±0.2% against ±0.5% limit; ISO 10545-8 thermal expansion 6.5 × 10⁻⁶; apparent density > 2.20 g/cm³)
- The Tile Association, Presentation on changes to BS 5385-1:2018 (tiles ≥0.1 m² solidly bedded; tiles >0.1 m² fixed above 3 m need mechanical fixings; gypsum plaster 20 kg/m²; large format >3600 cm²)
- HSE INDG143 Manual handling at work: a brief guide (guideline filter weights 25 kg men / 16 kg women at the most favourable lifting zone; not safe limits)
- Topps Tiles knowledge base, Tiling background weight limits (gypsum plaster 20 kg/m², plasterboard 32 kg/m²)
Results are calculations from the published methods and manufacturer figures shown, and depend on the data you enter. Always follow the tile, adhesive and grout manufacturers’ instructions, BS 5385 and the Tile Association guidance. Coverage rates vary by product and substrate. Check prices and VAT rules with your own records and HMRC.