Free Sand Calculator
Calculate the exact volume in cubic yards or cubic meters and estimated weight in tons for patios, paver bedding, and landscaping projects.
Area Measurements
Choose your units and enter the area dimensions.
Waste & Material Density
Account for screeding, spillage, and sand weight.
Planning estimate only. Bulk sand moisture levels and delivery compaction can vary from theoretical calculations.
Your Estimate
Calculated volume and tonnage required.
How It Is Calculated
Never compact the bedding sand before laying pavers. Bedding sand should be loosely screeded to a uniform 1-inch depth. The pavers are set on top and compacted into the sand together.
Recommended Sand Types
For paving bedding layers, always choose washed concrete sand (ASTM C33 or CSA A23.1). Avoid masonry sand or stone dust for bedding layers, as they contain fine particles that trap water and cause surface rutting.
Bulk Delivery vs. Bags
If your project requires more than 1 cubic yard (approx. 1.35 tons), ordering loose sand by truck from a local landscape yard or quarry is significantly cheaper than purchasing individual 50-lb bags from home centers.
How to Calculate Sand for Paving, Patios & Walkways
Sand is an indispensable material in hardscaping and masonry. It acts both as a smooth, workable bedding layer beneath pavers and as a stabilizing joint filler between them. Knowing exactly how much sand to order keeps your project on budget and ensures you don't stall your installation halfway through.
1. Measuring the Square Footage
Begin by measuring the length and width of the excavation area. Multiplying length by width gives you the surface footprint. For irregular or curved areas, segment the space into smaller rectangles or triangles, calculate each section individually, and add the sums together.
2. Determining the Ideal Sand Depth
Hardscape standards established by the Interlocking Concrete Pavement Institute (ICPI) specify a consistent 1-inch (25 mm) layer of bedding sand. Deviating from this depth can cause long-term structural failure: too thin, and the pavers cannot bed properly; too thick, and the sand will shift under heavy foot or vehicular loads.
Sand Calculation Formulas (Step-by-Step)
To calculate sand volume manually by hand, use the standard mathematical formulas below depending on your measurement system:
US Customary Formulas (Feet, Inches, Yards)
1. Surface Area: Area (sq ft) = Length (ft) × Width (ft)
2. Base Volume (cu ft): Volume (cu ft) = Area (sq ft) × Depth (in) ÷ 12
3. Base Volume (cu yds): Volume (yd³) = Volume (cu ft) ÷ 27
4. Total Volume with Waste: Final Volume = Volume (yd³) × (1 + Waste % ÷ 100)
5. Estimated Weight (Tons): Total cu ft × Bulk Density (lb/cu ft) ÷ 2,000 lbs
Metric Formulas (Meters, Millimeters, Tonnes)
1. Surface Area: Area (m²) = Length (m) × Width (m)
2. Base Volume (cu meters): Volume (m³) = Area (m²) × Depth (mm) ÷ 1,000
3. Total Volume with Waste: Final Volume = Volume (m³) × (1 + Waste % ÷ 100)
4. Estimated Weight (Tonnes): Total Volume (m³) × Bulk Density (kg/m³) ÷ 1,000 kg
3. Converting Volume to Cubic Yards and Tons
Bulk materials in the US are typically sold either by volume in cubic yards or by weight in short tons. One cubic yard equals 27 cubic feet. A cubic yard of dry, compacted concrete sand weighs approximately 2,600 to 2,800 pounds (1.3 to 1.4 tons). In metric regions, quarries sell material in cubic meters or metric tonnes.
4. Factor in Waste, Compaction, and Moisture
Sand compacts when vibrating equipment runs across the finished pavers, drawing bedding sand upward into the lower joints. Additionally, damp sand delivered in bulk occupies slightly different volume due to bulking moisture. Always factor in an extra 10% waste buffer to account for screed loss and settling.
Frequently Asked Questions
How thick should the sand layer be under pavers?
The standard bedding sand layer should be an even 1 inch (25 mm) thick. Do not exceed 1.5 inches, as an overly thick sand layer can cause premature rutting and uneven settlement.
What type of sand should I use for a paver base?
Use coarse, washed concrete sand (ASTM C33 specification). Do not use play sand, beach sand, or limestone screenings for the bedding layer, as they do not provide adequate drainage or interlock.
How many 50 lb bags of sand are in a cubic yard?
One cubic yard of concrete sand weighs roughly 2,700 lbs. Therefore, you will need approximately 54 bags (50 lbs each) to equal one full cubic yard.
Can I calculate sand using metric measurements?
Yes. Select "Metric" in the dropdown above to enter your dimensions in meters and millimeters. Results will automatically display in cubic meters and metric tonnes.
How much extra sand should I allow for waste?
A 10% allowance is typical for rectangular areas to cover base settling and screeding imperfections. Add 15% for projects with curves or complex shapes.