Can I just dump pea gravel on grass?

You can, but the grass will die and weeds will push through within one season. Strip the sod, compact the soil, lay 4-oz woven geotextile fabric, then add the stone.

How much extra pea gravel should I order for waste?

Add 10% for projects under 5 cubic yards, 7% for larger projects. The buffer covers edge spillage, settling, and uneven sub-base.

What is the smallest area worth buying bulk pea gravel for?

Any project above 1 cubic yard. Below that, bagged 0.5 cu ft pea gravel from a home improvement store costs less and avoids a delivery fee.

How is pea gravel sold — by ton or cubic yard?

Bulk suppliers in the US East and South typically sell by the ton. Suppliers in the Midwest and West more often sell by the cubic yard. Always convert before comparing prices: 1 cubic yard equals approximately 1.4–1.5 tons.

Pea Gravel Coverage Calculator

Q: How many square feet does 1 cubic yard of pea gravel cover?

One cubic yard of pea gravel covers 162 sq ft at 2 inches deep, 108 sq ft at 3 inches, or 81 sq ft at 4 inches. These figures assume even spread before compaction — expect roughly 10% reduction after settling.

Q: How do I calculate coverage for an irregular shape?

Break the shape into rectangles, triangles, and circles. Calculate each section separately, then add the totals. For a kidney-shaped area, split it into two semicircles and a rectangle in the middle.

Q: Does pea gravel coverage change in winter?

No — volume is volume. Install in temperatures above 40°F so the sub-base compacts correctly. Frozen ground prevents proper compaction and the base will shift when it thaws.

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Formulas verified against USGS, NRMCA & ASTM primary sources. Methodology · Last updated May 2026

Enter your project area and gravel depth — get cubic yards, tons, and 50-lb bag count instantly. Results include a 10% waste factor. Use this calculator for patios, pathways, garden beds, dog runs, and any other flat area.

Cubic Feet

— ft³

Cubic Yards

— yd³

Weight (lbs)

— lb

Weight (tons)

— tons

Bags (50 lb)

— bags

Estimated Cost

—

How the Pea Gravel Coverage Calculator Works

Most pea gravel projects start with a known area — a 12×14 ft patio, a 60 sq ft flower bed, a 90 sq ft front border. The problem is converting that area into a number your supplier understands. This calculator handles that conversion with one formula:

Volume (ft³) = Area (ft²) × Depth (ft)
Then: ÷ 27 for cubic yards · × 100 lb for weight · ÷ 2,000 for tons · ÷ 0.5 for 50-lb bag count

The density figure — 100 lb per cubic foot, or approximately 1.35 tons per cubic yard — comes from USGS Construction Sand and Gravel data for loose, dry pea gravel. All conversion factors match what landscape suppliers and quarries use when they quote by the ton or cubic yard.

Worked Example: 10×12 ft Patio at 3 Inches Deep

Area: 10 × 12 = 120 sq ft
Depth in feet: 3 ÷ 12 = 0.25 ft
Volume: 120 × 0.25 = 30 cubic feet
Cubic yards: 30 ÷ 27 = 1.11 yd³
Add 10% waste: 1.11 × 1.10 = 1.22 yd³ to order
Weight: 1.22 × 1.35 = 1.65 tons
50-lb bags: 1.22 ÷ 0.0185 = 66 bags — bulk delivery is far cheaper at this volume

At bulk pricing of $45/yd³, this patio costs approximately $55 in material. At bagged pricing of $6 per 50-lb bag, the same project costs $396 — more than 7 times the bulk price. The cost calculator compares these figures side by side once you enter your local prices.

Pea Gravel Coverage Reference Table

How much area does a fixed quantity of pea gravel cover at different depths? Use this table as a quick reference before opening the calculator.

Quantity	1 inch deep	2 inches deep	3 inches deep	4 inches deep
1 cubic yard	324 sq ft	162 sq ft	108 sq ft	81 sq ft
1 short ton	240 sq ft	120 sq ft	80 sq ft	60 sq ft
1 cubic foot	12 sq ft	6 sq ft	4 sq ft	3 sq ft
1 bag (50 lb)	6 sq ft	3 sq ft	2 sq ft	1.5 sq ft
½ ton mini-bag	120 sq ft	60 sq ft	40 sq ft	30 sq ft

Depth drives coverage more than any other variable. A half-ton mini-bag stretched to 1-inch top-dressing covers 120 sq ft. Spread the same half-ton to 4 inches and it covers just 30 sq ft. Lock in your depth before you calculate — wrong depth = wrong order quantity.

Recommended Pea Gravel Depth by Application

These are the depths used as defaults across all calculators on this site, verified against NRMCA standards and ASTM specifications where applicable.

Application	Recommended Depth	Notes
Decorative mulch bed top-dressing	1–2 inches	Weed suppression only — not structural
Garden pathway / walkway	2–3 inches	Needs edging to contain stones
Patio or seating area	3 inches	Over 2-in compacted #57 stone base
Dog run	3–4 inches	Allows drainage; replace annually
Children's play area	3–4 inches	Not a playground safety surface — see below
Residential driveway	4–6 inches	Over 4-in crushed road base — mandatory
Playground safety surface	9–12 inches	ASTM F1292 mandatory minimum for fall protection
French drain fill	Full trench depth	Use washed gravel meeting ASTM C33

How Much Pea Gravel for Common Project Sizes

These pre-calculated figures include the 10% waste factor. All assume 3-inch depth unless noted.

Project	Area	Cubic Yards	Tons	50-lb Bags
Small garden path (10×3 ft)	30 sq ft	0.31 yd³	0.42 tons	17 bags
Standard patio (12×14 ft)	168 sq ft	1.71 yd³	2.31 tons	93 bags
Large patio (16×20 ft)	320 sq ft	3.26 yd³	4.40 tons	177 bags
Small driveway (10×20 ft, 4 in)	200 sq ft	2.71 yd³	3.66 tons	147 bags
Two-car driveway (20×40 ft, 4 in)	800 sq ft	10.86 yd³	14.66 tons	587 bags
Dog run (8×12 ft, 3 in)	96 sq ft	0.98 yd³	1.32 tons	53 bags

Bulk Pea Gravel vs Bagged — Which Should You Buy?

The bag count in the table above makes this decision obvious for large projects. For a two-car driveway you'd need 587 bags — that's 587 trips from your car to the driveway. Bulk delivery wins at any project above 1 cubic yard on both cost and practicality.

Below 1 cubic yard — roughly a 10×5 ft path at 3 inches deep — bagged gravel from a home improvement store is genuinely competitive. You avoid delivery minimums, you can buy exactly what you need, and you don't need to be home for a truck. The bags calculator shows the exact bag count for any project size.

For a full 2026 price comparison including regional bulk delivery rates, see the pea gravel cost guide.

Coverage for Irregular and Circular Areas

For rectangular areas, enter the total square footage directly into the Area field above. For irregular shapes:

L-shaped areas: Divide into two rectangles, calculate each, add the totals, then enter the sum.
Circular areas: Calculate area = π × radius² (radius = diameter ÷ 2). A 14 ft diameter circle has area = 3.14159 × 49 = 153.9 sq ft.
Kidney or freeform shapes: Divide into overlapping rectangles and subtract the overlap, or break into a rectangle plus two semicircles.
Triangular areas: Area = 0.5 × base × height.

Always measure at the largest point and add 10% — it's better to have a small surplus than to run short and pay a second delivery fee.

What People Get Wrong

Four mistakes that result in short orders, overspend, or project failures — and how to avoid each one.

Trusting generic coverage charts without checking density

A "1 ton covers 80 sq ft at 2 inches" chart assumes 1.4 t/yd³ density. Many quarries supply pea gravel at 1.5–1.7 t/yd³ — the same ton then covers only 66–74 sq ft. Always confirm your supplier's specific density before placing the order.

Skipping the 10% waste factor

A 142 sq ft patio at 2 inches comes out to 0.88 yd³ on paper. Real-world settling, edge spillage, and uneven sub-base consume 9–12% more. Order 0.97 yd³ minimum or you will run short before you finish the edges.

Confusing loose spread depth with finished depth

You spread 3 inches of pea gravel. After foot traffic and rain settle it, the finished depth drops to approximately 2.4 inches. To end up with a finished 3-inch layer, spread 3.7 inches loose. This 20–25% compaction loss is why you order extra.

Mixing units mid-calculation

Depth in inches must be converted to feet before multiplying by area in square feet. Divide depth by 12 first. A 100 sq ft patio at 2 inches = 100 × (2÷12) = 16.7 cubic feet. Skip the divide-by-12 and you get 200 cubic feet — 12 times too much. This single error generates the most over-order calls landscape suppliers receive.

Related Calculators

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Pea Gravel Weight Calculator

Convert cubic yards to pounds, tons, kilograms, and metric tonnes.

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Cost Calculator

Enter your local price per ton or yard to get a full project cost estimate.

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Bags Calculator

See exactly how many 50-lb, 40-lb, or 80-lb bags your project needs.

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Driveway Calculator

Driveway-specific with compaction factor and base layer allowance.

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Frequently Asked Questions

How many square feet does 1 ton of pea gravel cover?

At a 2-inch depth, 1 ton of pea gravel covers approximately 80–100 square feet depending on stone density. At 3 inches that drops to 55–65 sq ft. Denser stone (1.6 t/yd³) reduces coverage; loose-screened gravel (1.4 t/yd³) extends it. Confirm your supplier's density before ordering.

How many square feet does 1 cubic yard of pea gravel cover?

One cubic yard covers 162 sq ft at 2 inches deep, 108 sq ft at 3 inches, or 81 sq ft at 4 inches. These figures assume even spread before compaction — expect roughly 10% reduction after settling.

What depth of pea gravel should I use?

Use 2 inches for walking paths and decorative beds. Use 3 inches for patios and dog runs. Use 4 inches minimum for driveways — always over a compacted road base layer. Playground safety surfaces require 9–12 inches per ASTM F1292.

Do I need to compact pea gravel?

Pea gravel's rounded shape resists compaction — you cannot tamp it like crushed stone. Allow it to settle naturally over 2–4 weeks, then top up thin spots. For driveways, install a 4-inch crushed-stone base underneath to give it structure and prevent rutting.

How thick should the base layer be under pea gravel?

Under decorative pea gravel: 2 inches of compacted #57 stone over geotextile fabric. Under a pea gravel driveway: 4 inches of crushed #3 stone, compacted in two 2-inch lifts. The base layer is what carries the load — the pea gravel surface layer does not.

Can I put pea gravel directly on grass?

You can, but the grass will die and weeds will push through within one season. Strip the sod down to bare soil, compact the ground, lay 4-oz woven geotextile fabric, then add the stone. Skipping the fabric turns a one-day job into annual weeding.

How do I calculate coverage for an irregular shape?

Break the shape into rectangles, circles, and triangles. Calculate each section's area separately, then add them together and enter the total into the Area field above. For a kidney-shaped area, split it into two semicircles and a central rectangle.

Does pea gravel coverage change in winter?

No — volume is volume regardless of season. However, install pea gravel in temperatures above 40°F so the sub-base compacts correctly. Frozen ground prevents proper compaction and the base shifts when it thaws in spring, causing surface unevenness.

How much extra pea gravel should I order?

Add 10% for projects under 5 cubic yards, 7% for larger orders. The buffer covers edge spillage, settling into the sub-base, and uneven spread. This calculator includes the 10% factor automatically — the result you see already accounts for waste.

When does bulk pea gravel become cheaper than bags?

Above 1 cubic yard, bulk delivery from a landscape supplier is almost always cheaper even after delivery fees. Below that threshold, bagged gravel from a home improvement store avoids minimum delivery charges and lets you buy exactly what you need.

Is pea gravel sold by ton or cubic yard?

US suppliers in the East and South typically sell by the ton. Midwest and West suppliers more often price by the cubic yard. Always convert before comparing quotes: 1 cubic yard equals approximately 1.4–1.5 short tons of pea gravel.

What do I do with leftover pea gravel?

Use leftover stone in flower beds, around tree wells, under downspouts, or along fence lines. Store any surplus under a tarp — pea gravel needs topping up every 2–3 years as stones scatter and settle, and having material on hand saves a future delivery order.

Sources & Methodology

Formula used: Volume (ft³) = Area (ft²) × Depth (ft). Cubic yards = ft³ ÷ 27. Weight = cubic yards × 1.35 tons/yd³. Bags = cubic feet ÷ 0.5 ft³/bag, rounded up.

Density source: 100 lb/ft³ (1.35 tons/yd³) for loose, dry pea gravel — verified against USGS Construction Sand and Gravel Statistics.

Verified against:

USGS Mineral Commodity Summaries — Construction Aggregates — density and yield data for rounded aggregates
NRMCA — National Ready Mixed Concrete Association — standards for aggregate base and sub-base calculations

Last reviewed: May 12, 2026 · Full methodology