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Fire Glass Calculator

Select your type of Fire Feature


For Square or Rectangle Shaped Fire Pits

Calculate how much fire glass you'll need for a square fire feature

* You can use other fire media to fill most of the fire pit, then cover the remaining 2" to 4" with fire glass.

(A) Fire Pit Width:  
 inches
(B) Fire Pit Depth:  
 inches
(C) *Fire Glass Height:  
 inches



 

Total Glass Needed (lbs):

   

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Link to Fire Glass


For Round or Octagon Fire Pits

Calculate how much fire glass you will need for a round fire feature.

* You can use other fire media to fill most of the fire pit, then cover the remaining 2" to 4" with fire glass.

(A) Fire Pit Inner Diameter:  
 inches
(B) *Fire Glass Height:  
 inches



 

Total Glass Needed (lbs):

   

 
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For Standard Fireboxes

Calculate how much fire glass you'll need for a fireplace.

* 2" to 4" of fire glass is the recommended height for fireplace fireboxes and pan burners.

(A) Firebox Front Width:  
 inches
(B) Firebox Rear Width:  
 inches
(C) *Fire Glass Height:  
 inches
(D) Firebox Depth:  
 inches



 

Total Glass Needed (lbs):

   

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Our Fire Glass Calculator will help you find the exact amount of fire media you will need for your outdoor feature! Simply choose the shape above that best matches your fire pit, enter the specified measurements of your fire feature, and click "Calculate Your Glass"! You will need to specify how much of a layer of fire glass you would like in your feature. We recommend using 2" to 4" to top of your feature and using lava rock to fill the rest of the feature underneath. The amount of lava rock needed is generally equal to 25 pounds per 1/2 cubic foot of holding capacity. To ensure proper air flow, select lava rock that is at least 1" in diameter. A steel mesh lath may be placed over the lava rock and burner element to hold the layer of fire glass safely in place to prevent it from slipping below the surface.

If you plan on using fire glass with a propane fire feature, we recommend drilling four holes near the base of your feature to allow more air to enter and disperse the gas. Since liquid propane is heavier than natural gas, it has a tendency to sink to the bottom of a feature, potentially causing hazardous buildup. Lava rock will need to be used to fill the base of your feature to provide more air pockets so you gas can circulate and eventually be safely released through the vent holes. If your feature will be placed on a pillar, you will need to ensure it provides proper ventilation.  To use fire glass with propane, fill the base with lava rock, then place a steel mesh lath above the lava rock and burner element, and fill a 2" layer of fire glass on top. 

We offer a range of styles and colors of fire glass and lava rock for you to add that perfect finishing touch! Feel free to browse our selection of fire media and outdoor fire features to find just what you're looking for!

 

Last updated on September 11th 2019.