Free calculator
Pea Gravel Calculator
Use this pea gravel calculator to estimate cubic feet, cubic yards, tons, bag count, coverage, and a simple cost placeholder from length, width, depth, density, and waste. It is built for planning small landscape projects before you order bagged or bulk gravel.
EstimateEstimate only; supplier material density, moisture, compaction, edging, and local conditions vary.
Project inputs
Estimate
0.53 cubic yards of pea gravel
A 80 sq ft area at 2 inches deep needs about 0.53 cubic yards, or 0.8 tons, after 8% extra material.
Printable material list
Estimate- Pea gravel0.53 cu yd8% waste included
- Pea gravel by weight0.8 tons1.5 tons/cu yd density
- Bagged pea gravel32 50-lb bagsround up before buying
- Bulk cost placeholder$29.15$55/cu yd assumption
- Coverage at 2 inches86.4 sq ftsame volume spread thinner or deeper changes coverage
Estimate only. Supplier density, moisture, compaction, edging, and project shape can change the delivered amount.
Visible defaults
Assumptions
- Default pea gravel density is 1.50 tons per cubic yard.
- Cubic yards equal cubic feet divided by 27.
- Bag count is based on selected bag weight and rounded up.
- Cost is a placeholder using your entered bulk price, not a quote.
Math
Calculation details
- Area = length x width.
- Cubic feet = area x depth in feet.
- Cubic yards = cubic feet / 27.
- Tons = cubic yards x selected density.
- Bag count = tons x 2,000 / bag weight.
What this pea gravel calculator does
Pea gravel is sold in different ways. A homeowner may see bagged gravel by the pound, bulk gravel by the cubic yard, or delivery tickets by the ton. This calculator keeps those units together. Enter the project footprint, depth, density, bag weight, and waste factor, and it converts the same volume into cubic feet, cubic yards, tons, bag count, coverage, and a simple bulk cost placeholder.
The tool is most useful for paths, patios, side yards, dog runs, drainage-looking decorative strips, garden borders, and small sitting areas. It does not decide whether pea gravel is the right base for traffic or drainage. It simply turns a measured area into a practical shopping list with the assumptions visible.
How deep should pea gravel be?
A two inch depth is a common planning depth for decorative walking areas when the base is already prepared and edged. Thin layers can expose fabric, soil, or old base material. Very deep loose gravel can feel unstable underfoot and can migrate beyond the edge. If the area needs a compacted structural base, estimate that base separately rather than treating pea gravel as the whole assembly.
Depth has a direct effect on the order. A 100 sq ft area at 2 inches is about 16.7 cubic feet before waste. The same area at 3 inches is 25 cubic feet before waste. When a project is close to a delivery or bag threshold, checking depth before purchase can prevent both shortage and a pile of unused gravel.
Formula used
The calculator multiplies length by width to get square feet, then multiplies by depth in feet to get cubic feet. Cubic yards are cubic feet divided by 27. Tons are cubic yards multiplied by the density you enter. Bag count converts tons to pounds, divides by bag weight, and rounds up to whole bags.
Density is the least universal part of the estimate. Pea gravel density can vary by stone type, gradation, moisture, and supplier. The default of 1.50 tons per cubic yard is a planning value. If a local yard lists a different conversion, use the local number in the density field.
Measuring irregular areas
For a curved path, break the project into simple rectangles or use average width. A 30 ft path that varies between 3 ft and 5 ft wide can be estimated as 30 ft by 4 ft. For L-shaped areas, calculate each rectangle separately and add the results, or use the total square footage and adjust length and width until the area matches.
Edging matters because loose gravel spreads. If the final edge is not installed yet, a slightly higher waste allowance can cover the real shape and low spots. For tight geometric patios with installed edging, the default may be enough. For organic garden paths, a higher waste factor is often more realistic.
Bagged versus bulk gravel
Bagged pea gravel is convenient for small areas, tight access, and projects where delivery is expensive. Bulk gravel is usually easier for larger volumes, but it requires a delivery spot and a plan for moving the material. The calculator shows both so you can compare the scale of the job before choosing a buying method.
The optional cost field is intentionally simple. It multiplies cubic yards by your entered price per cubic yard. It does not include delivery, pallet deposits, regional pricing, taxes, minimum orders, or supplier fees. Use it to compare scenarios, not as a finished supplier price.
Common mistakes
The most common mistake is using square feet as if it were cubic feet. Gravel depth matters. Another mistake is ignoring the difference between tons and cubic yards. A cubic yard is volume; a ton is weight. The conversion depends on density, so two suppliers can give different ton estimates for the same volume.
Do not forget fabric overlap, edging, and base preparation. Those items are not included in the gravel number, but they affect the finished project. The printable list gives the gravel quantities and assumptions, leaving room to add landscape fabric, staples, edging, and tools.
Quick reference
Pea gravel coverage by depth
| Depth | Coverage per cubic yard | Coverage per ton |
|---|---|---|
| 1 in | 324 sq ft | 216 sq ft |
| 2 in | 162 sq ft | 108 sq ft |
| 3 in | 108 sq ft | 72 sq ft |
| 4 in | 81 sq ft | 54 sq ft |
Based on 1 cubic yard = 27 cubic feet and a planning density of 1.5 tons per cubic yard. Supplier density varies.
FAQ
Pea Gravel Calculator FAQ
How do I calculate pea gravel needed?
Multiply length by width to get square feet, multiply by depth in feet to get cubic feet, then divide by 27 for cubic yards. Add a waste factor and convert to tons or bags using the density and bag weight.
How many square feet does a cubic yard of pea gravel cover?
One cubic yard is 27 cubic feet. At 2 inches deep, it covers about 162 square feet before waste. At 3 inches deep, it covers about 108 square feet before waste.
How many tons are in a cubic yard of pea gravel?
A common planning value is about 1.5 tons per cubic yard, but supplier density can vary. Use the supplier conversion when ordering by weight.
Is 2 inches of pea gravel enough?
Two inches is a common decorative depth for paths or garden areas with edging and prepared base. Heavier use, poor subgrade, or drainage needs may require a different assembly.
Should I buy pea gravel in bags or bulk?
Bags are convenient for small areas and limited access. Bulk ordering is usually better for larger volumes, but delivery minimums, dump location, and moving labor matter.
Does the calculator include landscape fabric?
No. It estimates gravel quantity only. Add landscape fabric, staples, edging, base material, and tools separately based on the actual project.
Methodology
Who built and reviewed this estimate
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