Online Cubic Yard & Cubic Metre Calculator (US, UK, CA, AU, IN)
Planning a backyard patio, pouring a concrete slab driveway, spreading decorative bark mulch, or ordering crushed stone for a foundation? Estimating bulk construction materials in cubic yards (yd³) and cubic metres (m³) is the universal standard used by concrete ready-mix suppliers, gravel quarries, and landscape nurseries worldwide. Explore our full suite of Calculators & Math Tools to run interest plans, loan amortization schedules, or percentage calculations safely.
PariTool’s Cubic Yard Calculator allows homeowners, civil contractors, and landscapers across the United States, United Kingdom, Canada, Australia, and India to instantly calculate volume for rectangular slabs, circular fire pits, triangular garden wedges, and conical piles. It automatically handles unit conversions (feet, inches, metres, cm), adds standard waste buffer margins (5% - 15%), predicts total tonnage weight, and provides country-specific bag breakdowns (US 80lb/60lb bags, UK 850kg bulk dumpy bags, Aussie 20kg bags, and Indian Brass).
How Construction & Landscaping Materials are Sold by Country
United States (Imperial Standard)
Sold strictly in Cubic Yards (yd³). Ready-mix trucks carry 8–10 cubic yards. Retail stores (Home Depot, Lowe’s) sell pre-mix concrete in 80 lb (0.60 cu ft) and 60 lb (0.45 cu ft) bags, and bark mulch in 2.0 cu ft and 3.0 cu ft bags.
United Kingdom (Bulk Bags & m³)
Sold in Cubic Metres (m³) or 850kg Bulk Bags (Dumpy / Jumbo Bags). One 850kg bulk bag yields ~0.65 m³ (~0.85 yd³) of ballast or sharp sand. Ready-mix concrete is ordered in m³ (C20/C25 mixes).
Canada (Dual Imperial & Metric)
Quarries and topsoil yards quote in both Cubic Yards (yd³) and Cubic Metres (m³). Retail bagging uses metric litres (25L, 50L) alongside imperial 2 cu ft mulch bags.
Australia & NZ ("Cubes" m³)
Ordered in Cubic Metres (colloquially called "Cubes"). DIY dry concrete at Bunnings comes in standard 20kg Aussie bags (~108 bags make 1 cubic metre / cube of concrete).
India & South Asia (Brass & Cubic Metres)
Bulk sand, stone grit, aggregate, and excavation are universally measured in "Brass", where 1 Brass = 100 cubic feet = 2.8317 m³ = 3.7037 yd³. Cement is sold in standard 50kg ISI mark bags (~7.5 to 8 bags per m³ of M20 concrete).
The Universal Formulas: Cubic Yards & Cubic Metres
Convert depth in inches to feet by dividing inches by 12 first.
Convert depth in cm to metres by dividing cm by 100 first (10 cm = 0.10 m).
Quick Conversion Multipliers:
• 1 Cubic Yard (yd³) = 27 Cubic Feet (ft³) = 0.764555 Cubic Metres (m³)
• 1 Cubic Metre (m³) = 35.3147 Cubic Feet (ft³) = 1.30795 Cubic Yards (yd³)
• 1 Brass (India) = 100 Cubic Feet = 2.8317 Cubic Metres = 3.7037 Cubic Yards
• 1 UK Dumpy Bulk Bag (850kg) ≈ 0.65 Cubic Metres ≈ 0.85 Cubic Yards
Dual Coverage Reference Table: How Much Does 1 Cubic Yard & 1 Cubic Metre Cover?
| Depth / Thickness | Area Covered per 1 yd³ | Area Covered per 1 m³ | Typical Application |
|---|---|---|---|
| 1 Inch (2.5 cm) | 324 sq ft | 40.0 m² | Lawn topdressing, seed mulch layer |
| 2 Inches (5.0 cm) | 162 sq ft | 20.0 m² | Annual flowerbed refreshing, light mulch |
| 3 Inches (7.5 cm) | 108 sq ft | 13.3 m² | Weed-suppressing bark mulch, garden bedding |
| 4 Inches (10.0 cm) ★ | 81 sq ft | 10.0 m² | Standard residential concrete patio, sidewalk & base |
| 6 Inches (15.0 cm) | 54 sq ft | 6.7 m² | Heavy-duty driveways, commercial foundations |
Material Densities & Weight Estimates (US Tons vs Metric Tonnes)
A cubic yard and cubic metre measure volume, not weight. Because material densities vary significantly between light organic wood chips and dense structural concrete, understanding payload weights is critical for safe vehicle hauling:
Ready-Mix Concrete Slabs
Standard cured concrete weighs approximately 4,000 lbs (2 US tons / 1.8 metric tonnes) per cubic yard (or ~2,400 kg per cubic metre). Always include an 8% to 10% buffer for irregular subgrade and form deflection.
Crushed Stone, Gravel & Ballast
Crushed stone, pea gravel, ballast, and road base weigh between 2,500 and 2,800 lbs per cubic yard (~1.5 to 1.7 tonnes per m³). Gravel compacts down roughly 15% when tamped, so order a 10% to 15% buffer.
Screened Topsoil & Loam
Dry loose topsoil weighs approximately 2,000 to 2,200 lbs per cubic yard (~1.2 to 1.3 tonnes per m³). Wet soil can exceed 2,600 lbs (1.5 tonnes). Topsoil settles 10% to 15% after watering.
Bark Mulch & Wood Chips
Hardwood and cedar mulch are lightweight, weighing between 600 and 1,000 lbs per cubic yard (~350 to 600 kg per m³). Most standard pickup truck beds can safely haul 2 to 3 cubic yards of dry mulch.
How to Calculate Cubic Yards & Cubic Metres in 6 Easy Steps
Follow this contractor-approved methodology to accurately calculate material volume and avoid costly shortages or over-ordering:
- 1Measure Area Dimensions (Length & Width)
Measure the total length and width of the project area in feet (e.g. 12 ft × 10 ft) or metres (e.g. 3.6 m × 3.0 m). For circular areas, measure the diameter across.
- 2Determine Depth or Thickness
Determine the depth in inches or centimetres. Standard residential concrete patios, sidewalks, and mulch layers are typically 4 inches (10 cm) deep. Driveways are usually 5 to 6 inches (12–15 cm).
- 3Convert Depth into Feet or Metres
Because measurements must match, divide inches by 12 (4 inches ÷ 12 = 0.333 ft). For metric, divide centimetres by 100 (10 cm ÷ 100 = 0.10 m).
- 4Multiply to Find Cubic Volume
Multiply Length × Width × Depth. For a 12 ft × 10 ft patio at 4 inches (0.333 ft): 12 × 10 × 0.333 = 40.0 Cubic Feet (or 1.13 Cubic Metres).
- 5Divide by 27 to Get Cubic Yards
Since 1 cubic yard equals 27 cubic feet: 40.0 cu ft ÷ 27 = 1.48 Cubic Yards (yd³).
- 6Add an 8% to 10% Waste Margin
Always multiply by 1.10 (10% buffer) to account for ground unevenness, spillage, and settling: 1.48 × 1.10 = 1.63 Cubic Yards to order.
Cubic Yard & Volume Calculator International FAQs
How do you calculate cubic yards manually?
To calculate cubic yards manually: 1) Measure Length, Width, and Depth in feet. 2) Multiply them together: Length (ft) × Width (ft) × Depth (ft) = Total Cubic Feet. 3) Divide by 27 because there are 27 cubic feet in one cubic yard: Total Cubic Feet ÷ 27 = Cubic Yards. For example, a 10 ft × 10 ft patio at 4 inches (0.333 ft) depth is: 10 × 10 × 0.333 = 33.3 cu ft ÷ 27 = 1.23 cubic yards.
How do I convert Cubic Yards (yd³) to Cubic Metres (m³)?
1 Cubic Yard equals 0.764555 Cubic Metres (1 yd³ = 0.764555 m³). Conversely, 1 Cubic Metre equals 1.30795 Cubic Yards (1 m³ = 1.308 yd³). To convert yards to metres, multiply by 0.7646. To convert metres to yards, multiply by 1.308.
What is a "Brass" in Indian construction and how does it convert?
In Indian civil construction and government PWD standards, a "Brass" is the standard unit of volume for sand, gravel, stone aggregate, and excavation. 1 Brass equals exactly 100 cubic feet (cu ft). Converting to other units: 1 Brass = 2.8317 Cubic Metres (m³) = 3.7037 Cubic Yards (yd³). A standard 10-wheel tipper dumper truck carries 3 to 4 Brass of sand or gravel.
How many UK 850kg bulk bags (Dumpy/Jumbo Bags) make 1 cubic metre or cubic yard?
In the UK, builders merchants (Travis Perkins, Wickes, B&Q, Jewson) sell ballast, sand, and gravel in 850kg bulk bags (also called Jumbo or Dumpy bags). One 850kg bulk bag contains approximately 0.60 to 0.65 cubic metres (0.80 to 0.85 cubic yards) of dense aggregate. You typically need 1.5 to 1.6 bulk bags for 1 cubic metre, or about 1.2 bulk bags per cubic yard.
How do Australians calculate concrete in "Cubes"?
In Australia and New Zealand, contractors refer to cubic metres (m³) simply as "Cubes". Ready-mix mini-trucks deliver 2 to 3 cubes, while standard agitator trucks carry up to 7 to 8 cubes. For DIY bagging with 20kg Aussie pre-mixed bags (e.g. Dingo, Bunnings), you need approximately 108 bags of 20kg concrete to mix 1 cubic metre (cube) of wet concrete.
How many bags of concrete make a cubic yard (US Standard)?
For US pre-mix bags: An 80 lb bag yields approximately 0.60 cubic feet, requiring 45 bags per cubic yard. A 60 lb bag yields approximately 0.45 cubic feet, requiring 60 bags per cubic yard. A 40 lb bag yields about 0.30 cubic feet, needing 90 bags per cubic yard.
How many 25kg or 50kg cement bags are needed per cubic metre / cubic yard?
For standard M20 / C20 grade structural concrete: 1 cubic metre requires approximately 7 to 8 bags of 50kg cement (India/Asia standard) OR 15 to 16 bags of 25kg cement (UK, Europe, Australia standard) combined with sand and aggregate.
Why are there 27 cubic feet in a cubic yard?
1 yard equals 3 feet. A cubic yard is a cube measuring 3 feet long by 3 feet wide by 3 feet high. Multiplying 3 ft × 3 ft × 3 ft gives exactly 27 cubic feet (3 × 3 × 3 = 27).
How much extra material (waste margin) should I order?
Contractors strongly recommend ordering 8% to 10% extra for concrete slabs and 10% to 15% extra for mulch, dirt, and gravel. Extra material accounts for ground settling, grade unevenness, form expansion, and spillage.
How many bags of mulch or topsoil make one cubic yard?
Retail mulch and topsoil bags typically come in 2 cubic foot or 3 cubic foot bags. Since 1 cubic yard = 27 cubic feet: You need 13.5 (round up to 14) bags of 2 cu ft mulch, or 9 bags of 3 cu ft mulch per cubic yard. In metric, 1 cubic metre equals 20 bags of 50 Litres.
How much does 1 cubic yard of dirt, gravel, or concrete weigh?
Concrete weighs approximately 4,000 lbs (2 US tons / 1.8 metric tonnes) per cubic yard. Gravel/Crushed stone weighs 2,400 - 2,800 lbs (~1.3 tonnes). Topsoil weighs 2,000 - 2,200 lbs (~1.0 tonne). Dry mulch weighs 600 - 1,000 lbs (~0.4 tonne).
How many square feet and square metres does 1 cubic yard cover?
At 1 inch (25mm) depth: 1 cu yd covers 324 sq ft (30.1 m²). At 2 inches (50mm): 162 sq ft (15.1 m²). At 3 inches (75mm): 108 sq ft (10.0 m²). At 4 inches (100mm): 81 sq ft (7.5 m²). At 6 inches (150mm): 54 sq ft (5.0 m²).
How is topsoil and mulch sold in Canada?
Canada operates on a dual system: Bulk suppliers and landscape depots sell bulk mulch and topsoil in Cubic Yards (yd³) and Cubic Metres (m³), while retail hardware stores (Home Depot Canada, RONA, Canadian Tire) sell pre-bagged soil in 25-litre, 50-litre, and 56.6-litre (2 cu ft) plastic bags.
Is it cheaper to buy bulk cubic yards or retail bags?
For projects larger than 1 to 2 cubic yards (1 to 1.5 m³), ordering bulk delivery by the truckload is usually 40% to 60% cheaper than buying individually bagged materials from home improvement retailers, plus it eliminates hauling dozens of heavy bags.
Does PariTool store my project dimensions or location?
No, absolutely not. All calculations run 100% locally in your web browser using client-side JavaScript. No dimensions, project details, or IP records are ever transmitted to any external server.