How it works
Use the area of the outer circle minus the pit circle, multiplied by depth.
Simple example
A 3 ft pit with a 2 ft wide ring at 4 in deep needs about 10.5 cubic ft.
Outdoor & Landscaping
Fire Pit Gravel Calculator
Estimate gravel for a ring around a pit.
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Common question
Does this cover safe construction?
No. Check fire clearances and local rules separately.
This is a planning estimate. Check product instructions, dimensions and site conditions before purchasing or building.