Glass Weight
Calculator
Calculate the weight of any glass panel before you order. Enter your dimensions and thickness to get an instant weight estimate — essential for planning installation, handling, and structural support.
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Cutting tolerance within 1mmWeight is calculated using the standard glass density of 2.5 kg/m² per mm of thickness. Actual weight may vary slightly depending on glass type and manufacturing tolerances.
Summary
Glass Weight
Area
—m²
Thickness
6mm
- Shape
- Rectangle
- Thickness
- 6mm
- Length
- —
- Width
- —
- Quantity
- 1 pcs
Delivery: Ships within 5–7 business days
Glass weight chart, thickness and shelving guidance
Standard glass weighs 2.5 kg per square metre for every millimetre of thickness. Use the chart to check a panel without the calculator, or to convert between millimetres and inches.
Weight per square metre by thickness
| Thickness | kg per m² | kg per sq ft | 1 m × 1 m panel |
|---|---|---|---|
| 3 mm | 7.5 kg | 0.70 kg | 7.5 kg |
| 4 mm | 10 kg | 0.93 kg | 10 kg |
| 5 mm | 12.5 kg | 1.16 kg | 12.5 kg |
| 6 mm | 15 kg | 1.39 kg | 15 kg |
| 8 mm | 20 kg | 1.86 kg | 20 kg |
| 10 mm | 25 kg | 2.32 kg | 25 kg |
| 12 mm | 30 kg | 2.79 kg | 30 kg |
| 15 mm | 37.5 kg | 3.48 kg | 37.5 kg |
| 19 mm | 47.5 kg | 4.41 kg | 47.5 kg |
Working from inches
| Imperial | Nearest metric | kg per m² | kg per sq ft |
|---|---|---|---|
| 3/16" | 4.8 mm (rounded to 5 mm) | 12.5 kg | 1.16 kg |
| 1/4" | 6.4 mm (rounded to 6 mm) | 15 kg | 1.39 kg |
| 3/8" | 9.5 mm (rounded to 10 mm) | 25 kg | 2.32 kg |
| 1/2" | 12.7 mm (rounded to 12 mm) | 30 kg | 2.79 kg |
Glass shelf thickness and maximum span
Indicative spans for toughened glass supported at both ends. Load, bracket type and how the shelf is fixed decide the real answer, so anything beyond domestic shelving needs a structural check.
6 mm glass
up to 600 mm
Light shelves: ornaments, bathroom, small displays
8 mm glass
up to 800 mm
Books and kitchen shelves with brackets at both ends
10 mm glass
up to 1200 mm
Heavier retail and kitchen shelving
12 mm glass
up to 1500 mm
Long spans, add a mid support beyond this
Glass weight and thickness questions
How much does 6 mm glass weigh?
15 kg per square metre. A 1200 × 600 mm panel of 6 mm glass is 0.72 m², so it weighs about 10.8 kg.
How much does 3/8 inch glass weigh?
3/8 inch is 9.5 mm, which we round to 10 mm toughened glass: 25 kg per square metre, or about 2.3 kg per square foot (roughly 5 lb).
How do I work out glass weight per square foot?
Take the weight per square metre from the chart and multiply by 0.0929. So 10 mm glass is 25 × 0.0929 = 2.3 kg per square foot.
What glass thickness do I need for a shelf?
6 mm suits light shelves up to about 600 mm between supports, 8 mm to about 800 mm, 10 mm to about 1200 mm and 12 mm to about 1500 mm. Beyond that, or for anything load-bearing, have a structural check done.
Does this weight include the frame or hardware?
No. The calculator covers the glass only. Add roughly 3–6 kg per square metre for aluminium framing, and check hinge and bracket ratings before hanging a heavy panel.