Stone Calculator — Crushed, Decorative & Landscape Stone

Calculator

Length

Width

Depth

Stone type

Price per ton (optional)

$/ton

Waste factor

You need

1.94 cubic yards

≈ 2.76 tons · ≈ 105 bags (50 lb) · $165 total cost

How to Calculate Stone Quantity

Stone quantity calculation follows the same fundamental math as gravel or any bulk material: you measure area, choose a depth, and convert to volume. The complication with stone is density — there's a huge range across stone types, from feather-light lava rock (0.55 t/yd³) to dense river rock (1.60 t/yd³). Picking the right density for your specific stone matters.

Volume (cubic yards) = (Area in sq ft × Depth in inches) ÷ 324
Weight (tons) = Volume × Stone density factor
Cost = Weight × Price per ton

Worked example

Say you're filling a 200 sq ft decorative landscape bed with river rock at 3 inches deep:

Volume: (200 × 3) ÷ 324 = 1.85 cubic yards
Weight (river rock at 1.60 t/yd³): 1.85 × 1.60 = 2.96 tons
Cost (at $90/ton): 2.96 × $90 = $266
With 5% waste: Order 3.1 tons (~$280)

Density matters — don't guess

Using the wrong stone density can throw your order off by 20–60%. Light decorative stones (1.30 t/yd³) versus heavy river rock (1.60 t/yd³) is a 23% difference. Lava rock is 60% lighter than river rock by volume. Always pick the specific stone type from the dropdown.

Types of Stone for Landscaping

Picking the right stone matters as much as calculating the right amount. Each type has ideal applications and tradeoffs in cost, weight and appearance.

Crushed stone

Angular pieces produced by mechanical crushing. The most versatile and least expensive stone for utility purposes. The ASTM number describes the size: #57 (1/2 to 1 inch) is the most common for drainage and base courses; #411 is a dense graded mix with fines that compacts hard, ideal for driveway tops. Density: 1.42 t/yd³. Cost: $30–55/ton.

River rock

Naturally smooth, rounded stones formed by water tumbling. Sold in size grades: small (1–2 inch), medium (2–4 inch), large (3–5 inch), and boulder (5+ inch). Decorative use in landscape beds, dry creek beds, water features and around downspouts. Doesn't compact — stays loose. Density: 1.55–1.60 t/yd³. Cost: $60–130/ton.

Limestone

Crushed sedimentary stone with high calcium content. Slightly cheaper than granite-based crushed stone in regions where limestone is locally quarried. Compacts tightly and develops a hard surface over time. Good driveway material in dry climates; can leach calcium and raise soil pH in beds. Density: 1.45 t/yd³. Cost: $35–55/ton.

Marble chips

Crushed white or colored marble, typically 3/8 to 3/4 inch. Premium decorative use for formal beds, around statues, and high-end landscaping. Reflects light brightly — adds visual impact. Can yellow slightly over years from acid rain. Density: 1.50 t/yd³. Cost: $80–150/ton.

Lava rock

Volcanic stone — porous, lightweight, usually red or black. Excellent for fire pits (heat-resistant), green roofs (lightweight), and decorative beds. Density just 0.55 t/yd³ — about 60% lighter than river rock by volume. Cost: $90–180/ton.

Flagstone

Large flat stones used for patios, walkways and stepping stones rather than as fill material. Sold by ton (for irregular pieces) or by the pallet (for cut squares). Calculate by area coverage rather than volume: 1 ton typically covers 80–120 sq ft as a single-layer surface.

How Much Stone Do You Need by Project Type

Different projects use stone differently. Here are real-world quantities for the most common applications.

Decorative landscape beds

Cover with 2–3 inches of stone over landscape fabric. A 300 sq ft bed at 2.5 inches deep of river rock needs 2.3 cubic yards (3.7 tons). Going deeper than 3 inches looks artificial in most residential settings and wastes material.

Around the house foundation (drainage strip)

A 2-foot wide strip of #57 crushed stone around a typical 1,500 sq ft house perimeter (~160 linear feet) at 3 inches deep: 1.5 cubic yards (2.1 tons). Add landscape fabric beneath to prevent settling into soil.

Stone walkways

A 3 ft wide × 30 ft path with 3 inches of crushed stone over a 2-inch base: total 5 inches of stone. Quantity: 1.4 cubic yards (2.0 tons). Steel or stone edging keeps stone in place — without it, expect significant migration into adjacent lawn.

Driveways

For a 20 × 10 ft residential driveway at 6 inches total depth (4-inch base of #411 + 2-inch top of #57): 3.7 cubic yards (5.3 tons). Use a plate compactor on the base layer. Edge restraint dramatically extends driveway lifespan.

Fire pit areas

A 6-foot diameter circular fire pit base at 4 inches of stone needs 0.35 cubic yards (0.5 tons). Use lava rock or pea gravel — never use limestone, river rock or sandstone in fire pits as they can crack or even pop when heated.

Dry creek beds

A 3 ft wide × 25 ft long dry creek with mixed stones (large boulders, medium river rock, smaller stones) typically uses a layered approach. Plan on roughly 1.5 cubic yards of mixed stones (2.4 tons) — about 60% medium-large river rock, 30% smaller fill stones, 10% accent boulders.

Stone Coverage Reference Table

How many square feet one ton of typical landscape stone covers at common depths:

Stone type	1" depth	2" depth	3" depth	4" depth
Crushed stone (1.42 t/yd³)	228 sq ft	114 sq ft	76 sq ft	57 sq ft
Landscape stone (1.30 t/yd³)	250 sq ft	125 sq ft	83 sq ft	62 sq ft
River rock (1.60 t/yd³)	203 sq ft	101 sq ft	68 sq ft	51 sq ft
Limestone (1.45 t/yd³)	224 sq ft	112 sq ft	75 sq ft	56 sq ft
Marble chips (1.50 t/yd³)	216 sq ft	108 sq ft	72 sq ft	54 sq ft
Lava rock (0.55 t/yd³)	590 sq ft	295 sq ft	197 sq ft	148 sq ft

Stone Cost: What to Budget

Stone pricing varies dramatically by type, quality, and distance from quarry. National averages in the United States in 2026:

Type	Per ton (bulk)	Per yard	Per 50 lb bag
Crushed stone	$30–55	$40–75	$4–6
Limestone	$35–55	$50–75	$4–6
Pea gravel / small landscape	$45–90	$60–120	$5–8
River rock (small)	$60–110	$80–160	$6–10
River rock (large/boulders)	$80–180	$100–250	—
Marble chips	$80–150	$120–225	$8–12
Lava rock	$90–180	$50–100	$6–10
Mexican beach pebbles	$200–400	$300–600	$15–25

Delivery typically adds $50–200, with a 1-ton or 1-yard minimum. Many decorative stones are only available bagged, especially exotic types like beach pebbles or polished river rock — and bagged is 3–5× more expensive per ton than bulk.

Installing Landscape Stone: Best Practices

Whether for decorative beds or functional drainage, the install process matters more than the stone choice for long-term results.

Excavate properly. Remove all sod and topsoil to a depth of stone thickness plus 1–2 inches for base fabric and grading. Stone laid directly on grass disappears within a year.
Grade for drainage. The surface should slope away from buildings at 1–2% minimum. Standing water causes stone to migrate, weeds to thrive, and beds to look dirty.
Install landscape fabric. Non-woven geotextile fabric (not plastic sheeting). Overlap seams 6 inches and pin every 2 feet with fabric staples.
Add edge restraint. Steel, stone, or composite edging. Without it, stone wanders into lawn within a season. Plastic edging is cheap but fails within 3–5 years.
Lay stone in layers. For thick applications (over 3"), spread in 2-inch lifts and rake level. Helps achieve consistent depth.
Don't compact decorative stone. River rock, marble chips and lava rock should stay loose. Only compact crushed stone driveway bases.

Maintenance and Refresh

Landscape stone is one of the lowest-maintenance hardscaping options, but it does need attention:

Annual top-up: Add about 1/2 inch of fresh stone every 1–2 years to maintain appearance. For a 200 sq ft bed, that's about 0.3 cubic yards / 0.4 tons.
Rake annually: Once per spring, rake to redistribute stones and refresh the look. Pull out any debris (leaves, twigs) that has accumulated.
Weed control: With landscape fabric installed properly, weeds should be minimal. Spot-treat with horticultural vinegar or pull by hand (carefully, to avoid disturbing fabric).
Edging maintenance: Check edging annually. Reset or replace sections that have shifted or sunk. This is where most stone migration starts.

Common Mistakes to Avoid

Skipping landscape fabric: Without fabric, stone sinks into soil over 2–5 years. You'll wonder where it went.
Wrong depth: Too shallow (under 2") looks sparse and exposes fabric; too deep (over 4") is wasteful and looks artificial.
Mismatched stone type: Pea gravel as a driveway top, river rock in a fire pit, marble chips around acid-loving plants — all common errors.
Forgetting edge restraint: Stone migrates outward from any unconfined edge. Edging adds 10% to project cost but doubles longevity.
Buying bagged for large projects: Anything over 0.5 cubic yards is cheaper delivered bulk. Bags are convenient but expensive.

Frequently Asked Questions

How much landscape stone do I need?

Calculate area in square feet, multiply by depth in feet (depth inches ÷ 12), then divide by 27 to get cubic yards. Multiply by stone density (typically 1.30-1.60 tons/yd³) for weight. For a 200 sq ft bed at 3 inches deep with river rock: 1.85 yd³ ≈ 2.96 tons.

What's the difference between crushed stone and river rock?

Crushed stone is angular and interlocks when compacted — used for driveways, drainage and structural bases. River rock is smooth and rounded, used decoratively in beds, water features and pathways. Crushed stone compacts; river rock shifts and stays loose, so each suits different purposes.

How much does landscape stone cost per ton?

In 2026, landscape stone runs $30–130/ton. Crushed stone is cheapest ($30–55), limestone $40–70, decorative river rock $60–130, marble chips $80–150, and exotic stones (Mexican beach pebbles, polished river rock) $150–300+. Delivery typically adds $50–150.

How much area does a ton of stone cover?

Coverage depends on stone density and depth. For typical landscape stone (1.4 t/yd³) at common depths: 1 ton covers 90 sq ft at 2 inches deep, 60 sq ft at 3 inches, 45 sq ft at 4 inches. Heavier stones like river rock cover slightly less per ton.

How deep should landscape stone be?

For decorative beds: 2–3 inches over landscape fabric is enough to suppress weeds and look full. For pathways: 3 inches over a compacted base. For drainage: 4 inches minimum. Driveways need a 4-inch base + 2-inch top = 6 inches total. Deeper isn't always better — it just costs more.

Do I need landscape fabric under stone?

Yes for almost all decorative and surface applications. Non-woven geotextile fabric prevents stone from sinking into soil over time (which is what causes that 'disappearing stone' look after 3-5 years) and blocks 90%+ of weed growth. Skip it only for French drains where you want soil contact.

What's the best stone for a driveway?

Use #411 dense-grade crushed stone or DGA (dense grade aggregate) for the 4-inch base — it compacts hard. Top with 2 inches of #57 crushed stone or 3/8-inch chip. Avoid pure pea gravel, river rock or marble chips as a top layer — they shift under vehicle weight.

How heavy is a yard of stone?

Standard crushed stone weighs 1.42 tons (2,840 lb) per cubic yard. River rock is heavier at 1.55–1.60 tons/yd³. Limestone runs 1.45 tons/yd³. Lava rock is much lighter at just 0.55 tons/yd³ — perfect for green roofs and lightweight applications.

Can I install landscape stone myself?

Yes for beds and small areas — a typical 100 sq ft decorative bed is a weekend DIY job with a wheelbarrow, rake and edging. Larger projects (driveways, retaining walls) involve excavation, compaction and edging that often justify hiring professionals or renting equipment.

How many bags of stone make a yard?

Bagged stone typically comes in 0.5 cubic foot bags, so it takes 54 bags to equal one cubic yard. At retail prices ($5–8/bag), that's $270–432 per yard equivalent — versus $40–80/yard delivered in bulk. Breakeven for bulk delivery is around 0.5 to 1 cubic yard.

Will landscape stone fade in the sun?

Most natural stones (river rock, limestone, granite) keep their color indefinitely. Marble chips can yellow slightly over years. Dyed or colored stones (red lava, painted decorative) fade significantly in 2–5 years of UV exposure. For long-lasting color, choose natural unpainted stone.

Is river rock or pea gravel better for drainage?

Pea gravel works better for active drainage applications (French drains, foundation drainage) because the smaller, uniform pieces create more void space relative to surface area. River rock is better for decorative drainage features (dry creek beds, downspout splash zones) where look matters.