How much does glass weigh per square foot?

Glass weight per square foot depends on thickness: 1/8" = 1.6 lb/ft² , 1/4" = 3.3 lb/ft², 3/8" = 4.9 lb/ft², 1/2" = 6.5 lb/ft². Use our glass calculator for custom dimensions.

Does tempered glass weigh more than regular glass?

No, tempered glass weighs exactly the same as float glass of equal thickness. The tempering process (rapid heating and cooling) strengthens the glass but does not change its density of 156 lb/ft³.

How much does a window weigh?

A typical residential window (3×4 ft) with 1/4" glass weighs about 40 lbs (glass + frame). A large picture window (5×6 ft) with 1/4" glass has about 99 lbs of glass alone, plus frame weight.

How much does a glass shower door weigh?

A standard frameless glass shower door (3×6.5 ft) with 3/8" tempered glass weighs approximately 96 lbs . Heavier 1/2" glass doors weigh about 127 lbs. Always use proper mounting hardware rated for the weight.

What is the density of glass?

Standard soda-lime glass (float, tempered, laminated) has a density of 156 lb/ft³ (2,500 kg/m³). This is consistent across most architectural glass types. Borosilicate glass is slightly lighter at 139 lb/ft³.

Is glass heavier than acrylic?

Yes, glass is more than twice as heavy as acrylic. Glass weighs 156 lb/ft³ while acrylic (Plexiglass) weighs 74 lb/ft³. Acrylic is a popular lightweight alternative for windows and displays.

How much does laminated glass weigh?

Laminated glass weighs approximately the same as float glass per thickness — 156 lb/ft³ . The PVB interlayer adds minimal weight. A 1/4" laminated panel (two 1/8" sheets + PVB) weighs about 3.3-3.5 lb/ft².