Free Pea Gravel Calculator | Convert Cubic Feet, Yards & Tons

Pea Gravel Calculator Overview

Pea gravel is most often used for patios, walkways, playground borders, drainage-friendly garden beds, and decorative mulch replacement. Because it is rounded and loose, small changes in depth or edging can noticeably change how much material you need. This calculator converts your field measurements into cubic feet, cubic yards, tons, bag count, and estimated cost so you can compare bulk and bagged options before ordering.

For multi-material projects, use the main Rock Calculator to compare pea gravel with crushed stone, river rock, limestone, granite, sand, and other materials. For standard angular gravel estimates, use the dedicated Gravel Calculator.

This page focuses on practical pea gravel planning: recommended depths, density assumptions, bag-vs-bulk ordering, waste margin, edging, and common situations where pea gravel is or is not the right material.

New Density and Coverage Options

The pea gravel calculator now uses an editable density field set to 1.50 tons per cubic yard. Rounded pea gravel has more movement than angular stone, so supplier density, edging, and finished depth can change the order quantity. Coverage Area shows the measured square feet before depth is applied, which is useful for patios, paths, playground borders, and garden beds.

Pea gravel is not treated as compactable base stone. Use the waste percentage for edge loss, low spots, and refresh material, and use firm edging to reduce migration.

What is a Pea gravel calculator?

The pea gravel calculator uses standard measurement formulas to estimate required material for beds, paths, patios, and other landscape projects. Enter your dimensions to get cubic feet, cubic yards, and tons, then use the waste and cost fields to set a realistic purchase quantity. If you want the full formula breakdown, our Rock Calculator Guide explains densities, depth calculations, and measurement methods.

Pea gravel is sold in multiple sizes, and coverage can vary by stone shape and compaction. This calculator helps you estimate order quantity before visiting suppliers, reducing guesswork and repeat trips. If you are working with granite or stone-based materials instead, our Granite Calculator helps you estimate the correct volume with similar precision.

The calculator converts your project volume into cubic yards, tons, and bag counts, which helps with both bulk and bagged purchases. It applies length, width, and depth directly, so you can move from site measurements to an order quantity in one step.

Pea Gravel Tons for Larger Projects

Bulk pea gravel is usually ordered by the ton or cubic yard. Use the tons result when calling a landscape supplier, and use the cubic-yard result when comparing delivery quotes. Typical planning relationships include:

• One ton of pea gravel can usually cover around 100-120 square feet at about 2 inches deep, depending on density, compaction, and stone size.
• One cubic yard of pea gravel usually weighs around 1.3 tons, depending on moisture, stone size, and supplier density.

The calculator uses your editable density value to convert volume into tons. If your supplier lists a different bulk density, enter that number before using the final order estimate.

Bulk vs Bagged Pea Gravel

Small garden beds and container projects may be easier to handle with bags. Larger patios, paths, and play areas are usually cheaper and cleaner to order in bulk. Use the bag-size field when you are buying packaged material, and use tons or cubic yards when planning a delivery.

• Bags: better for small repairs, top-ups, containers, and tight access areas.
• Bulk delivery: better for patios, walkways, play zones, and full landscape-bed coverage.
• Supplier quote: confirm whether the price is per ton, per cubic yard, or per bag before comparing costs.

Recommended Pea Gravel Depths

Depth depends on the project. Use these values as planning starting points, then adjust for your edging, fabric, and site conditions.

• Decorative garden bed: 2 inches.
• Walkway or side-yard path: 2-3 inches.
• Patio seating area: 3 inches with firm edging.
• Playground surface: 6 inches or more only where local safety rules allow pea gravel.
• Drainage layer: confirm project requirements; rounded pea gravel is not a substitute for every engineered drain aggregate.

Using Pea Gravel for Circular Areas 

Circular patios, garden beds, and decorative gravel spaces need a circle-based area formula. The dedicated pea gravel calculator on this page uses length and width, so use the main Rock Calculator for circular layouts. For a manual check, use: 

• Radius or diameter of the circle 
• Desired depth 
• The calculator uses the formula for circular volume: 
• π × radius² × depth 

This formula helps estimate pea gravel for round tree rings, fire-pit areas, and circular beds. If your design uses larger decorative stones, try our River Rock Calculator for density and coverage guidance.

Pea Gravel Cost Factors

Pea gravel pricing changes by region, color, stone size, delivery distance, and whether material is bagged or delivered loose. Enter your supplier's price per ton to estimate material cost. If your project also requires sand for leveling or base preparation, use our Sand Calculator separately so the bedding layer is not mixed into the pea gravel order.

Choosing Pea Gravel Size

Smaller pea gravel, such as 3/8 inch stone, is common for walkways, patios, and garden beds because it is easier to walk on and rake smooth. Larger rounded gravel can be useful in drainage-friendly decorative areas, but it may feel less stable underfoot and may require deeper coverage. For angular aggregates that lock together, use the Crushed Stone Calculator; for limestone driveway or base layers, use the Limestone Calculator.

Conclusion

Whether your project is small or large, getting a clear estimate before ordering helps protect both schedule and budget. Use this calculator to plan quantity, cost, and bags up front, then adjust for your preferred waste margin.