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Fire Glass Bed Volume and Mass

Estimate bulk fire-glass mass for a rectangular, circular, triangular or trapezoidal fill bed.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

In initial displayed units, Glass density 1, Length (l) 20, Width (w) 10, Depth (d) 10 gives Area 200, Volume 200, Total weight 0.2.

Bulk mass = plan area×fill thickness×bulk density.

Worked example

Enter these known values and leave the other values blank.

Glass type
Enter a custom glass density
Glass density
1 g/cm³
Length (l)
20 cm
Width (w)
10 cm
Depth (d)
10 mm
Area
200 cm²
Volume
200 cm³
Total weight
0.2 kg

Assumptions and limitations

  • Use bulk fill density, not solid-glass density. Material presets are approximate scales; packing and particle size affect actual coverage. The result is a volume-and-mass estimate, not a burner compatibility or installation recommendation.
  • Use compatible measurement units. Clear an unknown before solving for it, and lock independent known values when comparing changes. Currency choices label amounts without exchange-rate conversion.

Common questions

Can I solve backward from the result?

Clear the unknown and enter independent known values. A rounded whole count cannot uniquely recover a continuous dimension; keep the original measured dimensions for procurement planning.

References

Bookify uses exact customary mass and volume definitions for density units, replacing rounded factors in the reference.

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