Pea Gravel Calculator — Yards, Tons and Bags
Estimate rounded pea gravel for non-structural paths, patios, play zones, drainage bands, and decorative beds in bulk or bags.
What does the pea gravel calculator calculate?
For pea gravel, calculate the filled volume, add waste, then compare bulk yards, estimated tons, and bag count. This tool assumes 1.35 tons per cubic yard and 0.5 cubic foot per bag by default. Rounded pea gravel moves under load, so it is not a substitute for compactable base.
Pea gravel bulk and bag formula
The same three-dimensional volume drives all results. Bulk volume is converted to cubic yards and tons, while bag count rounds up because partial retail bags generally cannot be purchased.
How to measure for an accurate estimate
- Measure inside the permanent edging because rounded pea gravel spreads without containment.
- Use finished depth after the compacted base and fabric, if specified, have been installed.
- Separate steps, drainage channels, or deeper low spots from the main rectangular area.
- Read the actual cubic-foot volume printed on the bag rather than estimating from bag weight.
Pea gravel sitting area
A 16 ft by 8 ft area gets 2 in of pea gravel with 10% waste, 1.35 tons/yd³, and 0.5-ft³ bags.
The order is 23.47 ft³, equal to 0.87 yd³, 1.17 tons, or 47 half-cubic-foot bags.Before you purchase material
- Compare bulk delivery with bag pricing after including delivery fees and minimum quantities.
- Select washed stone when cleanliness and drainage matter, but expect moisture to affect delivered weight.
- Install stable edging because small rounded stone migrates under foot traffic and runoff.
- Use angular compactable aggregate below pea gravel where a firm pedestrian base is required.
Common questions
How deep should pea gravel be?
A decorative bed may use roughly 2 inches, while a pedestrian application may use a deeper contained layer over a suitable base. The correct section depends on drainage, edge restraint, use, and accessibility requirements. Do not rely on loose pea gravel as structural base.
How many 0.5-cubic-foot bags are in one cubic yard?
One cubic yard contains 27 cubic feet, so it equals exactly 54 bags at 0.5 cubic foot each before waste. Real projects usually require extra bags for uneven depth and spillage, and package volumes should be verified before buying.
Is pea gravel good for a driveway?
Rounded pea gravel shifts and does not interlock like graded angular aggregate, making it a poor primary structural surface for many driveways. If appearance calls for pea gravel, a designer may specify it as a thin finish over engineered base and containment.
Does pea gravel need landscape fabric?
Fabric may separate stone from soft soil and slow mixing, but it does not solve poor drainage or eliminate every weed. Whether it is appropriate depends on soil, planting, slope, and maintenance goals. Follow the project detail and fabric manufacturer’s installation guidance.
Sources and reference standards
- National Institute of Standards and Technology — SI Units: VolumeFederal reference for volume units and unit relationships.
- U.S. EPA WaterSense — Landscaping TipsFederal recommendations for water-efficient landscape planning and soil preparation.