Pea Gravel Calculator

When to use this calculator

Use this pea gravel calculator for patios, walkways, dog runs, drainage areas, play spaces, garden paths, and decorative beds. Pea gravel is rounded and comfortable underfoot, but it shifts more than angular crushed stone, so depth, edging, and use matter.

• Planning pea gravel patios, sitting areas, and garden paths.
• Estimating gravel for dog runs, side yards, and small drainage zones.
• Comparing bagged gravel versus bulk delivery.
• Choosing a depth before ordering material.

Input guide

• Length and width define the surface area to cover.
• Depth should match the finished pea gravel layer after base prep.
• Waste factor covers edge loss, low spots, and supplier rounding.
• Density converts cubic yards to tons; ask your supplier for the best local value.
• Price per ton should include or exclude delivery consistently with your budget.

Formula and estimation method

Step-by-step worked example

A 14 ft by 10 ft side yard covered 2 inches deep uses about 23.3 cubic feet, or 0.86 cubic yards before waste. With 10% waste, plan about 0.95 cubic yards. At 1.40 tons per cubic yard, that is about 1.33 tons. At $72 per ton, the material estimate is about $96 before delivery.

Before you order materials

Use the Pea Gravel Calculator result as a starting quantity, then convert it into the way your supplier actually sells the material. Some stores sell by bag, each, pallet, strap, ton, cubic yard, or delivered load. Ask whether the quoted price includes delivery, fuel surcharge, pallet deposit, short-load fee, tax, unloading limits, or return rules. For outdoor projects, also check access for trucks, where material can be staged, whether the ground is firm enough for delivery, and how long the work area can stay open if weather changes.

For a safer order, write down the measurements used in the calculator, the waste percentage, the product size or density, and the final rounded quantity. Bring those notes to the supplier or contractor so they can catch unit mistakes before money is spent. If the project affects drainage, support, vehicle traffic, steps, walls, posts, or anything inspected by code, treat the calculator as a planning aid and verify the final material list with a qualified local source.

Common mistakes to avoid

• Using pea gravel where angular compacting base stone is needed.
• Skipping edging and then watching the gravel migrate into grass or beds.
• Using too deep a layer in walking areas, which can feel unstable.
• Forgetting fabric, base prep, drainage, or weed control.
• Comparing bag and bulk prices without converting both to the same volume or tonnage.

Planning notes and limitations

• Pea gravel does not lock together like crushed stone.
• For patios, use firm edging and consider a compacted base below the decorative layer.
• For dog runs, plan drainage, cleaning access, and replacement over time.
• For slopes, choose material carefully because rounded gravel can roll downhill.

This is a planning estimate. Follow local drainage guidance, supplier density information, accessibility needs, and professional recommendations where gravel affects walking safety, runoff, or structural base performance.