Fire Pit Gravel Base Calculator

Build a stable fire pit base using simple measurements. Compare gravel types, bag counts, and totals. Export results for shopping and job notes clear.

Calculator Inputs

Unit system

Switching units keeps your selections.

Base shape

Pick the footprint that matches your build.

Center cutout (ring base)

Useful for paver rings or open centers.

Outer diameter (in)

Common fire pits: 30–48 inches (76–122 cm).

Gravel depth (in)

Typical compacted base depth: 7.5–15 cm (3–6 in).

Freeboard (leave unfilled) (in)

Optional space for pavers or cap stones.

Compaction allowance (%)

Extra gravel to reach compacted thickness.

Waste/spillage (%)

Covers leveling, raking, and transport losses.

Gravel type (density preset)

Density affects weight and ton-based pricing.

Pricing method

Select how your supplier sells material.

Unit price ($)

Enter your local quote for the chosen unit.

Delivery fee ($)

Set to zero if you pick up material.

Sales tax (%)

Applied to material + delivery in this tool.

Bag size (ft3)