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  • Home /
  • Fire Glass Calculator | Estimate Your Fire Glass Needs | American Fire Glass

Fire Glass & Lava Rock Calculator

Transform your fire feature with our Fire Glass & Lava Rock Calculator. Accurately calculate the right amount of fire glass or lava rock for your fire pit or fireplace with American Fire Glass. Say goodbye to guesswork and elevate your fire experience now!"

Here’s how to use the calculator

  • Select either the “Fire Glass” or “Lava Rocks” tab
  • Select your shape (round, square, rectangular, bowl, or fireplace)
  • Type in your measurements Note: make sure to enter all measurements in inches
  • Click “Calculate”. That’s it!

Fire Glass Calculator

Calculate Diagram

Round Fire Pit Calculator

Diameter (A) in.
Glass Depth (B) in.
You Will Need [X] Pounds Of Glass
We recommend 2" - 4" of glass depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Square Fire Pit Calculator

Width (A) in.
Glass Depth (B) in.
You Will Need [X] Pounds Of Glass
We recommend 2" - 4" of glass depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Rectangular Fire Pit Calculator

Width (A) in.
Length (B) in.
Glass Depth (C) in.
You Will Need [X] Pounds Of Glass
We recommend 2" - 4" of glass depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Fire Bowl Calculator

Diameter (A) in.
Glass Depth (B) in.
You Will Need [X] Pounds Of Glass
We recommend 2" - 4" of glass depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Fireplace Calculator

Front Width (A) in.
Back Width (B) in.
Fireplace Depth (C) in.
Glass Depth (D) in.
You Will Need [X] Pounds Of Glass
We recommend 2" - 4" of glass depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Round Fire Pit Calculator

Diameter (A) in.
Lava Depth (B) in.
You Will Need [X] Pounds Of Lava
We recommend 2" - 4" of lava depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Square Fire Pit Calculator

Width (A) in.
Lava Depth (B) in.
You Will Need [X] Pounds Of Lava
We recommend 2" - 4" of lava depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Rectangular Fire Pit Calculator

Width (A) in.
Length (B) in.
Lava Depth (C) in.
You Will Need [X] Pounds Of Lava
We recommend 2" - 4" of lava depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Fire Bowl Calculator

Diameter (A) in.
Lava Depth (B) in.
You Will Need [X] Pounds Of Lava
We recommend 2" - 4" of lava depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.
Calculate Diagram

Fireplace Calculator

Front Width (A) in.
Back Width (B) in.
Fireplace Depth (C) in.
Lava Depth (D) in.
You Will Need [X] Pounds Of Lava
We recommend 2" - 4" of lava depth for most fireplaces. For rectangular and square fireplaces, use the same front width as back width. All measurements should be made in inches.