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Landscaping & YardPea Gravel Calculator — How Much Pea Gravel Do I Need?
Enter the area and depth to estimate pea gravel in cubic yards and tons — for pathways, patios, play areas, and around plantings.
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How this calculator works
Volume = length × width × depth, converted to cubic yards (÷27) and to tons at about 1.4 tons per cubic yard. Pea gravel is rounded, so it shifts underfoot more than crushed stone.
What changes how much you need
- 2 inches is enough for decorative cover; 3 inches for walkable paths.
- Because pea gravel is rounded, edge it firmly — it migrates without a border.
- For patios, set it over a compacted crushed-stone base, not bare soil.
- Add ~10% for spreading and settling.
Frequently asked questions
How deep should pea gravel be?
About 2 inches for decorative areas and 3 inches for paths you walk on regularly.
How many tons of pea gravel in a cubic yard?
Roughly 1.4 tons, give or take with moisture and stone size.
Does pea gravel need a border?
Yes. The rounded stones spread out over time, so steel, stone, or timber edging keeps it contained.