How much does glass weigh per square foot?

Glass weight depends on thickness: 1/8" glass weighs 1.6 lb/ft², 1/4" weighs 3.3 lb/ft², 3/8" weighs 4.9 lb/ft², and 1/2" glass weighs 6.5 lb/ft².

What is the density of glass?

Standard soda-lime glass (float glass, tempered glass) has a density of 156 lb/ft³ (2,500 kg/m³). This is consistent across most architectural glass types.

Does tempered glass weigh more than regular glass?

No, tempered glass weighs the same as float glass of equal thickness. The tempering process strengthens the glass but does not change its density or weight.

How Much Does Float Glass Weigh?

Enter Dimensions

Length

Width

Thickness

Quick Presets

🪨 Float Glass (Window Glass)

Also Calculate

🪟

Tempered Glass

156 lb/ft³

🏛️

Natural Thin Stone Veneer (Flats)

14 lb/ft²

How much does float glass (window glass) weigh?

Float Glass (Window Glass) weighs 156 lb/ft³ (2,500 kg/m³).

Key Float Glass (Window Glass) Facts:

Density: 2,500 kg/m³ (156 lb/ft³)
Hardness: 5.5-6 on Mohs scale
Common uses: Windows, mirrors, glass doors, and architectural glazing

Use this calculator to determine float glass (window glass) weight by entering your dimensions below.

Formula: Weight = Volume × Density

Related Glass Calculators:

Tempered Glass • Laminated Glass • Acrylic (Plexiglass)Browse all Glass →

Formula & Assumptions

Formula:

Weight = Volume × Density

Density Used:

Float Glass (Window Glass): 156 lb/ft³ (2500 kg/m³)

Note:

Results are estimates based on average material densities. Actual weights may vary ±5% due to material composition and moisture content. For structural applications, verify with your supplier.

Grow your business with AI — Free newsletter & tools

Subscribe Free