Stone Calculator - Cubic Yards, Tons & Landscape Cost
Stone quantity is bed area times depth, converted to tons with the selected stone density. Decorative stone, crushed stone, and riprap all need density assumptions checked.
Density of stone used to convert volume into weight.
Percent added for cuts, waste, settlement, or field loss.
Cost uses the waste-adjusted material weight.
Change any value and the results, formula, and diagram update immediately. Use the same unit system throughout one estimate.
Stone Quantity Quick Reference
Tonnage for common decorative stone beds at typical depths. Average density 100 lb/cu ft for landscape rock; heavier dense materials (granite, marble) push 110-130.
| Bed area | 2 in deep | 3 in deep | 4 in deep | Bags @ 0.5 cu ft each |
|---|---|---|---|---|
| 50 sq ft | 0.31 ton | 0.46 ton | 0.62 ton | 17-25 bags |
| 100 sq ft | 0.62 ton | 0.93 ton | 1.23 ton | 33-50 bags |
| 200 sq ft (small bed) | 1.23 ton | 1.85 ton | 2.47 tons | 67-100 bags |
| 500 sq ft | 3.08 tons | 4.62 tons | 6.17 tons | 167-250 bags |
| 1000 sq ft (yard perimeter) | 6.17 tons | 9.26 tons | 12.35 tons | 333-500 bags |
Decorative stone is normally laid 2-3 in deep over weed barrier. Riprap and erosion-control stone goes much deeper (6-12 in or more).
Stone Types - Landscape and Beyond
River rock
Rounded smooth stones 1-3 inches. Mixed colour - tan, grey, brown. Around plantings, dry creek beds, drainage features.
Lava rock
Volcanic rock, very light (40-60 lb/cu ft). Red or black. Holds heat, popular around fire features and arid landscapes.
Marble chips
Bright white 3/4 in chips. Formal landscapes, around statuary. Yellows over time with iron in water.
Granite chips
Crushed granite, durable, pink/grey/black. Walkways, driveway accents.
Slate chips
Flat angular pieces. Dark grey, black. Modern, contemporary look.
Riprap
Large angular stones 4-30 inches. Slope stabilization, erosion control, stream banks. Sold by the ton.
Boulders
Sold by the piece (small under 100 lb) or by the ton (large). Used as accent or retaining. Delivered by skid steer or backhoe.
Veneer stone
Thin slabs (1.5 in thick) for cladding walls. Sold by sq ft of wall face. Real stone or manufactured cement-based veneer (Cultured Stone, Eldorado Stone).
Landscape Stone Beds
The proper way to install a decorative stone bed:
- Excavate 3-4 in deep for the stone layer.
- Edge restraint at the perimeter - steel, plastic, or stone edging.
- Weed barrier - landscape fabric (woven polypropylene), not plastic. Plastic holds water and rots plant roots.
- Stone layer 2-3 in deep. Rake even, water down to settle.
- Top up every 3-5 years - stones migrate, sink into the soil below the fabric, or disappear into mulched edges.
Veneer Stone (Wall Cladding)
Manufactured stone veneer (MSV) is the architectural product covering exterior walls, fireplace surrounds, and accent features. Different math: sold by face area of the wall, not by weight.
- Flats: 1.5 in thick stone pieces installed on the wall face. Coverage: typically 100 sq ft per pallet (US), 10 m² per m³ (EU).
- Corners: L-shaped pieces sized for outside building corners. Each linear foot of corner needs about 1 LF of corner stone.
- Setting bed: cement-based scratch coat over metal lath, then mortar applied to the back of each stone.
- Cost: $8-20 / sq ft material, $25-50 / sq ft installed.
- Real stone veneer: bluestone, granite, fieldstone - all heavier and pricier ($12-35 / sq ft material).
Density By Stone Type
| Stone type | Density (lb/cu ft) | Tons per cu yd |
|---|---|---|
| Lava rock | 30-50 | 0.5-0.7 |
| River rock | 90-100 | 1.3 |
| Crushed limestone | 95-105 | 1.35 |
| Crushed granite | 105-115 | 1.45 |
| Marble chips | 105-115 | 1.45 |
| Slate chips | 100-110 | 1.4 |
| Riprap (basalt, granite) | 110-130 | 1.55 |
| Boulders | 140-170 (solid stone) | 1.9-2.3 |
Cost Estimates Around The World
2026 retail prices for landscape stone, delivered.
| Region | River rock / decorative | Lava rock | Marble chips | Veneer stone (manufactured) |
|---|---|---|---|---|
| United States (USD) | $60-130 / ton | $100-200 / ton | $80-180 / ton | $8-20 / sq ft |
| Canada (CAD) | C$80-180 / tonne | C$140-280 / tonne | C$110-240 / tonne | C$12-28 / sq ft |
| United Kingdom (GBP) | £50-130 / tonne | £80-180 / tonne | £90-200 / tonne | £40-110 / m² |
| Eurozone (EUR) | €55-140 / tonne | €90-200 / tonne | €100-220 / tonne | €45-130 / m² |
| Australia (AUD) | A$120-260 / tonne | A$180-350 / tonne | A$200-400 / tonne | A$90-220 / m² |
| India (INR) | ₹2,500-7,000 / tonne (Kota stone, granite) | n/a (limited) | ₹4,000-12,000 / tonne (marble chips) | ₹150-700 / sq ft (natural stone cladding) |
| Mexico (MXN) | MX$1,500-3,500 / tonne | MX$2,000-4,500 / tonne | MX$2,500-5,500 / tonne | MX$400-1,200 / m² |
| Philippines (PHP) | PHP 3,500-8,000 / tonne | PHP 5,000-12,000 / tonne | PHP 6,000-15,000 / tonne | PHP 800-2,500 / m² |
Brand reference: US - Cultured Stone (Boral), Eldorado Stone, Coronado Stone, Ply Gem ProStone; UK / EU - Burlington, Marshalls, Natural Paving; India - Kota Stone, Tandur, Granite cladding suppliers. Bagged stone (50 lb / 22 kg) costs about 2-3x bulk per pound but works for small jobs.
Common Mistakes
- Treating lava rock and river rock as the same weight - lava is half the density.
- Skipping weed barrier under decorative stone - weeds dominate within one season.
- Using plastic sheet instead of landscape fabric - traps water and rots roots.
- Laying stone over bare topsoil - stones sink in within a year and disappear.
- No edge restraint - stone migrates into the lawn and bed edges blur.
- Ordering bagged when bulk would be cheaper - over 0.5 ton, switch to delivery.
- Mixing dye lots of decorative stone - colour banding shows.
- Confusing veneer stone (face area, sq ft) with landscape stone (weight, tons).
Stone Calculator FAQ
How many tons of stone for a 300 sq ft landscape bed?
At 3 in deep, 100 lb/cu ft: 300 x 0.25 x 100 / 2000 = 3.75 tons. Add 8% waste = 4 tons. Bagged (50 lb each) would be about 160 bags - clearly call for bulk delivery.
How deep should decorative stone be?
2-3 inches over weed barrier for visual landscape beds. 4 inches in high-traffic walking paths. 6+ inches for drainage and erosion control. Less than 2 in shows the fabric through; more than 3 in just costs money without looking better.
What is the difference between gravel and decorative stone?
Gravel is functional - utility crushed stone with mixed sizes and fines for compaction. Decorative stone is graded by colour, size, and look, washed clean, and sold as a finish material. Same calculator math, different prices.
How much does river rock cost?
US: $60-130 per ton delivered. UK: £50-130 per tonne. India: ₹2,500-7,000 per tonne for granite or Kota stone landscape rock. Bagged retail costs 2-3x bulk per pound.
Will weeds grow through landscape stone?
Yes, eventually - especially seeds blown onto the stone surface. Quality woven landscape fabric (Mirafi, US Fabrics) under the stone reduces weed growth dramatically. Plan to spot-treat annually with horticultural vinegar or careful herbicide.
How long does landscape stone last?
The stones themselves last forever. The bed needs top-up every 3-5 years because stones sink into the soil below the fabric, migrate out of the bed, or disappear into mulched edges. Plan annual maintenance.
Can I install veneer stone myself?
Yes - manufactured stone veneer is the DIY-friendly product. Real stone veneer needs more skill (weight, joint work). Both need a proper substrate: weather-resistive barrier, metal lath, scratch coat, then mortar-bedded stones.
How much stone for a fire pit?
A 3 ft diameter fire pit uses about 50-80 stones (3 courses deep, 4-6 in stones), or about 0.5-1 ton of stacking stone. Add fire brick at the inside face for heat resistance.
What weight delivery truck do I need?
Stone delivery: standard dump truck 5-7 tons; tri-axle 15-20 tons. For driveway delivery, confirm the truck weight does not exceed your driveway rating. Wet weight matters - asphalt driveways often have a posted weight limit.
Bulk vs bagged stone - when do I switch?
Above 0.5 ton (or about 20-25 of the 50 lb bags), bulk delivery is cheaper, faster, and saves carrying. Below that, bagged is fine. For decorative pieces or accent boulders, bagged makes sense regardless of total weight.
Related Construction Calculators
For utility crushed stone and road base, use the Gravel Calculator. For organic mulch on garden beds, see the Mulch Calculator. For sand under stone or pavers, the Sand Calculator. For topsoil on a lawn or new beds, see the Topsoil Calculator. More tools live on the Construction Calculators hub.
Sources
- USGS - Crushed Stone Statistics and Information
- National Stone, Sand & Gravel Association (NSSGA)
- Natural Stone Institute - dimension stone resources
- ASTM dimension stone standards
- Bureau of Indian Standards - IS 1124 (Kota stone)
- NIST Handbook 44 unit conversion tables
This calculator is for planning and ordering conversations. Local code, project drawings, engineered design, and manufacturer instructions control the final work.