Fire Glass and Lava Rock Quantity Calculators

1. Select the appropriate calculator above by clicking the orange arrowhead – Fire Glass or Lava Rock.
2. Select the shape of your fire pit burn area from the tabs by clicking on your selection – Round or Square & Rectangular (which also works for Linear).
3. Enter the required dimensions in the appropriate boxes in inches only.
4. The result will automatically show in the ‘Amount of Fire Glass Needed’ box.
5. Use the ‘Clear’ button to reset the calculator.

The Calculators are not interchangeable. Use the Lava Rock Calculator only for Lava Rock and Fire Glass for Fire Glass ONLY! 

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.