Fire Glass and Lava Rock Quantity Calculators

How to use the fire glass calculators:

Select which calculator you need, Fire Glass or Lava Rock. Open using the orange arrow head on right-hand side.
Select the shape of your fire pit, either Round, Square/Rectangular (also works for Linear), or fireplace.
Enter the required dimensions in the appropriate boxes in inches only.
The result will automatically show in the ‘Amount of Fire Glass Needed’ box.
Use the ‘Clear’ button to reset the calculator.

Fire Glass Calculators

Square / Rectangular Fire Glass Calculator

Lava Rock Calculators

Using the correct amount of fire glass in a fire pit is essential for several reasons:

Heat Distribution: Proper fire glass coverage ensures even heat distribution, preventing hotspots that can cause damage to the fire pit structure or the burner.

For Propane fire pits, use no more than one and a half inches above the burner.

In Natural Gas Fire Pits between two to four inches above the burner is recommended.

Coverage:

Conventional Burners: Ensure even coverage over the entire burner area to avoid exposing any part of the burner.

Jet or Nozzle Burners: Such as the Torpedo and Bullet burners, the Fire Glass must not cover the outlet of the nozzles or jets. The depth of the fire glass should be just flush with the nozzles or slightly lower.

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