Fire Glass and Lava Rock Quantity Calculators

1. Choose Fire glass or Lava rock, then the shape of your fire pit’s burn area. Linear pits use Square / rectangle / linear.
2. Measure the inside of the pan and enter the sizes in inches or centimetres. The letters A, B and C match the drawing.
3. Your total appears straight away, in pounds and in 10 lb jars or bags. Use the shop button to choose your colour or style.

The right fill depth depends on your burner and gas type, so check the coverage guidance below and your burner’s manual.

We strongly recommend consulting the manufacturer’s installation manual to ensure safety and optimize the burner’s longevity, as recommended fire media depths vary by brand.

Proper fire media coverage is crucial for even heat distribution, preventing hotspots that could damage the burner or fire pit structure. Additionally, the properties of propane and natural gas influence the maximum recommended depth of fire media above the burner.

• Generally, Propane fire pit burners should be covered with no more than 1 to 1.5 inches of fire media above the burner.
• For Natural Gas fire pit burners, the depth can be between 2 to 4 inches, although it’s best to use the minimum depth necessary for optimal performance.

Different burner styles affect the depth of fire media. For Jet or Nozzle Burners, such as Torpedo, Crossfire, and Bullet burners, the fire glass must not cover the tips. It should be level with the nozzles or slightly lower to ensure proper flame performance.

For more detailed information check out our article How to Use Fire Pit and Fire Place Glass.