Glass weight calculator
Enter panel size and thickness to get the weight in kilograms — for annealed, toughened, laminated and double-glazed (DGU) glass. Useful for planning lifting, hinges, channels and transport.
Basis: 2.5 kg per m² per mm (soda-lime glass, 2,500 kg/m³). Actual weight varies slightly with holes, cutouts and edge work — confirm with your fabricator for lifting and hardware decisions.
The formula
Weight (kg) = area (m²) × thickness (mm) × 2.5. Soda-lime glass — which is what windows, partitions, shower doors and table tops are made of — has a density of about 2,500 kg/m³, so every millimetre of thickness adds 2.5 kg per square metre. Toughening does not change the weight; laminated glass uses its nominal combined thickness; a DGU weighs the sum of its two panes (the air gap adds nothing).
Worked example: a 1200mm × 2100mm shower door in 8mm toughened glass = 1.2 × 2.1 = 2.52 m² × 8 × 2.5 = 50.4 kg. That is a two-person lift, and the hinge set must be rated above it.
Glass weight chart (kg per m² and per sq ft)
| Thickness | Weight per m² | Weight per sq ft |
|---|---|---|
| 4 mm | 10.0 kg | 0.93 kg |
| 5 mm | 12.5 kg | 1.16 kg |
| 6 mm | 15.0 kg | 1.39 kg |
| 8 mm | 20.0 kg | 1.86 kg |
| 10 mm | 25.0 kg | 2.32 kg |
| 12 mm | 30.0 kg | 2.79 kg |
| 15 mm | 37.5 kg | 3.48 kg |
| 19 mm | 47.5 kg | 4.41 kg |
Frequently asked questions
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