Glass Weight Calculator (Panes and Double Glazing)
Weight of a pane or a double-glazing unit from its size and glass thickness, per unit, in total and per square metre.
Results
Total weight of the glass
14.4
kg
Weight of one unit
14.4
kg
Weight per square metre
15.0
kg/m²
Area of one unit
0.960
m²
What this tool does
Ordinary soda-lime glass weighs about 2500 kg/m³, which is a handy 2.5 kg per square metre for every millimetre of thickness: a 6 mm pane is 15 kg/m², and a 4-16-4 double-glazing unit is 8 mm of glass, so 20 kg/m² — the air gap adds nothing worth counting. Laminated glass is the sum of its panes plus a thin interlayer, so add a little to the figure. Weight decides how many people and what suction lifters are needed to handle a pane, and what the frame and the fixings must carry.
Formula
mass = width × height × (t₁ + t₂) × density · soda-lime glass ≈ 2500 kg/m³ = 2.5 kg/m² for each mm
Variables
| Symbol | Meaning | Unit |
|---|---|---|
w | Width | mm |
h | Height | mm |
t1 | Thickness of the first pane | mm |
t2 | Thickness of the second pane (0 for a single pane) | mm |
n | Number of identical units | — |
ro | Density of the glass | kg/m³ |
MT | Total weight of the glass | kg |
MU | Weight of one unit | kg |
MS | Weight per square metre | kg/m² |
AR | Area of one unit | m² |
Worked example
- Width1200 mm
- Height800 mm
- Thickness of the first pane6 mm
- Thickness of the second pane (0 for a single pane)0 mm
- Number of identical units1
- Density of the glass2500 kg/m³
- Total weight of the glass14.4 kg
- Weight of one unit14.4 kg
- Weight per square metre15.0 kg/m²
- Area of one unit0.960 m²
Limitations
- Mixing units is the most common source of error. Convert every input to the units shown next to each field before calculating.
- Density changes with temperature, moisture and composition. Use a value from the supplier's data sheet whenever precision matters.