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Fire Glass Calculator

Fire Glass Calculator

Calculate fire glass weight and volume needed for fire pits and fireplaces

Calculate Fire Glass Requirements

cm
cm
mm

Typical depth: 25-75mm (1-3 inches)

Fire Glass Requirements

0.00
Coverage Area (cm²)
0.00
Volume (cm³)
0.00
Weight (g)

Glass Type: Reflective

Glass Density: 1.457 g/cm³

Estimated Cost: $0.00

Formula: Weight = Area × Depth × Density

Depth Recommendations

Minimum Coverage: 25mm (1") - Basic coverage over burner
Standard Coverage: 50mm (2") - Good visual appeal and heat distribution
Full Coverage: 75mm (3") - Maximum visual impact and burner concealment

Example Calculation

60cm Square Fire Pit Example

Fire Pit: 60cm × 60cm square fire pit

Glass Type: Recycled fire glass (1.445 g/cm³)

Depth: 75mm (7.5cm) full coverage

Area: 60 × 60 = 3,600 cm²

Calculation

Volume = Area × Depth = 3,600 cm² × 7.5 cm = 27,000 cm³

Weight = Volume × Density = 27,000 cm³ × 1.445 g/cm³ = 39,015 g

Result: 39.0 kg of recycled fire glass needed

Estimated Cost: $390 (at ~$10/kg)

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Fire Glass Types

Reflective Fire Glass

Coated for maximum light reflection

Density: 1.457 g/cm³

Recycled Fire Glass

Eco-friendly, natural appearance

Density: 1.445 g/cm³

Tempered Fire Glass

Heat-resistant, safety tested

Various densities available

Safety & Tips

⚠️

Only use certified fire glass - never regular glass

Ensure complete burner coverage for safety

Clean fire glass regularly for best appearance

Consider mixing with lava rock to reduce cost

Use mesh screen between different materials

Understanding Fire Glass

What is Fire Glass?

Fire glass is an ornamental bead material made of heat-tempered glass that can withstand high temperatures without melting or breaking. It's used as a decorative alternative to traditional fire pit media like lava rocks or ceramic logs.

How Does Fire Glass Work?

  • Covers the gas burner mechanism in fire pits and fireplaces
  • Reflects and refracts light from flames for sparkling effect
  • Does not burn itself - acts as decorative medium only
  • Creates illusion that glass itself is on fire

Calculation Formula

Volume = Area × Depth

Weight = Volume × Density

Key Considerations

  • Depth: 25-75mm typical range
  • Coverage: Must completely cover burner
  • Cost: Approximately $10-15 per kg
  • Safety: Use only certified fire glass
  • Maintenance: Clean periodically for best appearance

Cost-Saving Tip: Use lava rock as base layer and fire glass on top to reduce costs while maintaining visual appeal.

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