How deep should fire glass be?
Typically, you want just enough to cover the burner by 0.5 to 1 inch. A total depth of 1.5-2 inches is common.
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Results
Fire Glass Needed
31.7 lbs
Material Analysis
Fire pit project planning
Requirement
You need approximately 31.7 lbs of fire glass. Fire glass is typically sold in 10lb or 20lb bags.
Ordering Tip
For 31.7 lbs, you should order 40 lbs (e.g., 4 x 10lb bags).
Cost Estimate
Fire glass costs roughly $3-$6 per pound. Estimated cost: $127 - $159.
How to Use
Step-by-step instructions
- 1Select the shape of your fire pit (Rectangular or Round).
- 2Enter the dimensions (width/length or diameter) in inches.
- 3Enter the desired fill depth (usually 1-2 inches over the burner).
- 4The calculator will estimate the pounds of fire glass needed.
Weight Formula
Calculates volume (Rectangular: L x W x D, Round: pi x r^2 x D) and multiplies by density (~0.055 lbs/in^3).
Weight = Volume x DensityVariables:
VolumeVolume of the fill area in cubic inchesDensityDensity of fire glass (~0.055 lbs/in^3)Example
Rectangular Pit
Inputs:
Shape:Rectangular
Width:12 in
Length:24 in
Fill Depth:2 in
Steps:
- 1.Volume = 12 * 24 * 2 = 576 cu in
- 2.Weight = 576 x 0.055 = 31.7 lbs
Result:
31.7 lbs