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Glass Weight Calculator

Calculate the weight of any glass lite for lifting, transport, and structural planning. Float glass weighs 13.0 lb per square foot per inch of thickness.

Quick reference: glass weight per square foot

  • 1/8 inch (3mm): 1.6 lb/SF
  • 3/16 inch (5mm): 2.4 lb/SF
  • 1/4 inch (6mm): 3.3 lb/SF
  • 3/8 inch (10mm): 4.9 lb/SF
  • 1/2 inch (12mm): 6.5 lb/SF
  • 5/8 inch (16mm): 8.1 lb/SF
  • 3/4 inch (19mm): 9.8 lb/SF
  • 1 inch (25mm IG, glass only): 13.0 lb/SF

Float glass density is 156 lb/cubic foot, which equals 13.0 lb/SF per inch of thickness. Insulated glass units add the second lite weight plus a small allowance for the spacer.