Fire Glass Calculator

Calculate the quantity and weight of fire glass needed for your pit or fireplace.

Fire Feature Dimensions

Unit System

Pit Shape

Length (in)

Width (in)

Glass Depth (in)

Material Estimate

Enhancing your fire pit?

Select the shape and enter dimensions to calculate the exact amount of fire glass required.

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.

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."

Formula: Weight (lbs) = Volume (in³) × 0.085

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