Calculate the quantity and weight of fire glass needed for your pit or fireplace.
Fire Feature Dimensions
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Material Estimate
Enhancing your fire pit?
Select the shape and enter dimensions to calculate the exact amount of fire glass required.
About this calculator
Overview
Fire glass is a premium tempered media designed for gas fire pits and fireplaces. Unlike lava rock, it doesn't melt, pop, or emit toxic fumes. It provides more heat radiation and a modern aesthetic. Proper calculation ensures full burner coverage for even flame distribution while minimizing cost.
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Pro Tips
For deep pits, fill the bottom with inexpensive lava rock and top with 1-2 inches of fire glass to save significantly on material costs.
Ensure the glass pieces are not so small that they clog the burner orifices; standard 1/2-inch glass is most common.
You can mix different colors or styles of glass (reflective vs. non-reflective) for a custom look.
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Fun Facts
"Fire glass is tempered to withstand temperatures up to 1,200°F (650°C)."
"A standard depth of 2 to 3 inches (5-8 cm) is ideal for hiding burners while allowing gas to flow."
"Fire glass weighs approximately 85 pounds per cubic foot."
