Fire Pit Calculator

Estimate materials for building a circular fire pit including blocks, cap stones, and gravel.

Blocks / Stones Needed
0
retaining wall blocks
Cap Stones
0
for top row
Rows / Courses
0
Gravel Needed
0 cu ft
Fire Ring Size
--
Outside Diameter
0 ft

How to Calculate Fire Pit Materials

Circumference: Pi x Inside diameter

Blocks per row: Circumference / Block width

Rows: Wall height / Block height

Total blocks: Blocks per row x Rows

Fire Pit Building Tips

  • Location: At least 10-20 feet from structures
  • Base: 6" of gravel for drainage, extending 12" beyond walls
  • Fire ring insert: Protects blocks from direct heat
  • Cap stones: Use adhesive on top course for safety

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