Glass · Sheet sizes
Quarter glass sheet: 1605 × 1275 mm
A quarter sheet of glass is 1605 × 1275 mm, 2.05 m². It weighs 20.5 kg at 4 mm, 30.7 kg at 6 mm and 51.2 kg at 10 mm. Float glass weighs 2.5 kg per m² per millimetre of thickness (2500 kg/m³, EN 572-1), and toughened glass weighs the same. The quarter sheet, 1605 by 1275 mm, is the smallest of the stock sizes the optimiser offers: the float line's jumbo (6000 by 3210) is cut down to DLF at 3210 by 2250, then to half at 2550 by 1605 and quarter at 1605 by 1275.
Weight by thickness
| Thickness | kg/m² | kg per sheet | Handling (the weight calculator's guideline) |
|---|---|---|---|
| 3 mm | 7.5 | 15.3 | One person, by the 25 kg guideline |
| 4 mm | 10.0 | 20.5 | One person, by the 25 kg guideline |
| 5 mm | 12.5 | 25.6 | Two people, by the guideline |
| 6 mm | 15.0 | 30.7 | Two people, by the guideline |
| 8 mm | 20.0 | 40.9 | Two people, by the guideline |
| 10 mm | 25.0 | 51.2 | Three or four people, or a lifter |
| 12 mm | 30.0 | 61.4 | Three or four people, or a lifter |
| 15 mm | 37.5 | 76.7 | Three or four people, or a lifter |
| 19 mm | 47.5 | 97.2 | Three or four people, or a lifter |
| 25 mm | 62.5 | 127.9 | Mechanical lifter |
Figures from the glass weight calculator: area × thickness × 2.5 kg per m² per mm. Laminated glass and double glazing are there too.
How many panes one sheet gives
| Pane | Per sheet | Of the sheet's area | Cutting plan |
|---|---|---|---|
| Door panel 900 × 2100 | 0 | — | Does not fit this sheet |
| Shower screen 900 × 1900 | 0 | — | Does not fit this sheet |
| Window 1200 × 1200 | 1 | 70.4 % | Open in the optimiser |
| Pane 1000 × 1000 (1 m²) | 1 | 48.9 % | Open in the optimiser |
| Pane 600 × 900 | 2 | 52.8 % | Open in the optimiser |
| Pane 500 × 500 | 6 | 73.3 % | Open in the optimiser |
Counted by the optimiser's own packer with its defaults: 10 mm edge trim per side, 4 mm breakout between cuts, rotation allowed, three-stage guillotine cuts. Each link opens the optimiser with that sheet and that order loaded, so you see the same count drawn. A real order mixes sizes: paste yours.
Before you order to this size
Sizes move a little between manufacturers: confirm the sheet with your merchant before you cut to a plan. The glass reference has the four sizes with the cutting allowances.
Other stock sizes: Jumbo / PLF 6000 × 3210 · DLF 3210 × 2250 · Half 2550 × 1605 · all four
Questions people ask
- What size is a quarter sheet of glass?
- 1605 × 1275 mm, which is 2.05 m². The quarter sheet, 1605 by 1275 mm, is the smallest of the stock sizes the optimiser offers: the float line's jumbo (6000 by 3210) is cut down to DLF at 3210 by 2250, then to half at 2550 by 1605 and quarter at 1605 by 1275. Sizes move a little between manufacturers.
- How much does a quarter sheet of glass weigh?
- 20.5 kg at 4 mm, 30.7 kg at 6 mm, 40.9 kg at 8 mm and 51.2 kg at 10 mm: float glass weighs 2.5 kg per m² per millimetre (2500 kg/m³, EN 572-1), and toughened glass weighs the same.
- How many 1200 × 1200 panes come out of a quarter sheet of glass?
- 1, as the optimiser lays them out with 10 mm edge trim per side and 4 mm breakout: 70.4 % of the sheet's area.