Pea Gravel Calculator
Working out how much pea gravel to buy for a path, patio, or play area? Enter your area and depth and this calculator returns the cubic yards, tons, and 0.5 cu ft bags you need. Pea gravel is small rounded stone, smooth and comfortable underfoot, which makes it a favorite for decorative ground cover — but those same rounded edges mean it never locks together, so it always needs an edge to hold it and a base to sit on rather than carrying any weight itself.
Total weight ≈ 1,901.23 lb (0.95 tons). Bulk material is heavy — check your vehicle's payload/GVWR; over ~1 ton, delivery is usually safer than hauling it yourself.
Bag or bulk?
You need only about 0.68 cubic yards (0.95 tons). Under ~2 cubic yards, bagged is usually the better call — you can carry the bags yourself and skip arranging a bulk drop, with no leftover pile to deal with.
- 37 × 0.5 cu ft bag
Quantities are planning estimates — confirm with your supplier.
How it works
We start from the area you enter times your depth to get the geometric volume (area × depth). Enter dimensions in feet, inches, yards, or metric — everything is converted to feet first. For a decorative layer, 2 inches covers most ground and 3 inches gives a deeper, softer top you can rake into shape.
Pea gravel is rounded, so we add no compaction. Angular, dust-bound stone interlocks and settles when you tamp it — that is crusher run's whole job — but smooth pea gravel just rolls past itself and stays loose, so there is no settle to order for. We add only the default 10% waste for spillage, raking, and uneven ground.
What you get: cubic yards, tons (from pea gravel's loose density near 2,800 lb/yd³), and 0.5 cu ft bag counts. Because pea gravel is sold in volume bags, we count by volume — your ordered cubic feet divided by 0.5 and rounded up — not by weight like the 50 lb landscaping bags on the gravel and crushed stone pages. What we leave out: delivery trips. Loose stone is heavy, so we report total weight and let you match it to your vehicle's payload rather than guessing loads. Choosing a grade: pea gravel is one rounded decorative grade, roughly 3/8". If you want a chunkier rounded look for beds or a dry creek, that is larger river rock; if you want angular stone that drains freely, that is clean #57 — size that on the crushed stone calculator instead.
Worked example
Patio area, 10 ft × 8 ft, 2 in of pea gravel
Spreading pea gravel 2 inches deep over a 10 ft × 8 ft patio. Pea gravel is rounded and decorative — it never compacts, so there is no settle to order for, just the default 10% waste.
This sits right at the bag-vs-bulk crossover: well under about 2 cubic yards, so bags work — but that is still a lot of bags to carry from the car, which is exactly the call the shopping list makes for you.
- Area
- 80 sq ft
- Volume (in place)
- 0.49 cu yd
- Order (compaction + waste)
- 0.54 cu yd
- Weight
- 0.76 tons
- 0.5 cu ft bag
- 30
Coverage at a glance
| Depth | 1 ton covers | 1 cu yd covers |
|---|---|---|
| 2" | 116 sq ft | 162 sq ft |
| 3" | 77 sq ft | 108 sq ft |
FAQ
How much pea gravel do I need for a patio or path?
Enter your shape, dimensions, and depth above and the calculator returns cubic yards, tons, and 0.5 cu ft bags. A typical decorative layer is 2–3 inches deep — 2 inches for a firm path or patio top, 3 inches if you want a deeper, softer cover. The worked example on this page runs a 10 ft × 8 ft patio at 2 inches so you can see how the numbers come together for an area of your own.
How many bags of pea gravel are in a cubic yard?
About 54 bags, since a cubic yard is 27 cubic feet and the standard bag holds 0.5 cubic feet (27 ÷ 0.5 = 54). That is the conversion for a full yard; for your actual project, enter the area and depth above and the calculator gives the exact bag count for the volume you need, waste included, so you are not left short.
Should I buy pea gravel in bags or in bulk?
Under about 2 cubic yards, bags are usually the practical choice — no delivery minimum and no leftover pile — but remember that even a small patio can run a couple dozen 0.5 cu ft bags, and each one has to be carried and emptied by hand. Above roughly 2 cubic yards, a single bulk drop delivered loose beats hauling and opening fifty-plus bags. The calculator makes the call for you based on project size rather than leaving you to compare two numbers.
Does pea gravel need a base or edging?
Yes to both. Because the stones are rounded and never lock together, loose pea gravel spreads and migrates underfoot without something to hold it: lay it over a firm, compacted base and trap it inside a solid border or edge restraint so it stays where you put it. For a base that actually firms up, use crusher run — it is dense-graded and compacts hard, so size it on the crusher run calculator. (Clean #57 crushed stone is a drainage layer, not a compacted base — it stays open and loose by design, so do not count on it to firm up underfoot.) Skip the edge and you will be raking stray gravel back off the lawn and beds for years.
Does pea gravel compact?
No. Compaction depends on angular, dust-bound material whose pieces wedge and lock together when tamped; pea gravel is smooth and rounded, so the stones just roll past each other and stay loose. That is why this calculator adds zero settlement for it — and why a contained edge and a firm base matter, since the loose layer relies on them instead of locking into place. If you actually want a surface that firms up, such as a path that packs underfoot, decomposed granite or crusher run is the compactable choice.