Calculate exact sand cubic yards, tons, 50-lb retail bags, wheelbarrow loads, and material costs across masonry mortar, paver bedding, sandboxes, and concrete mixing.
For a rectangular project area, multiply Length by Width to obtain gross square footage:
Area = Length (ft) x Width (ft).
For circular fire pits or round pools, use:
Area = pi x (Diameter / 2)².
Convert depth in inches to cubic yards using the aggregate formula:
Cubic Yards = (Area x Depth in inches) / 324.
This constant is derived from 27 cubic feet per cubic yard divided by 1/12 foot per inch of depth.
Multiply cubic yards by the specific sand bulk density. Standard washed concrete sand weighs approximately 2,600 lbs/yd³ (1.30 tons). Add a 5% to 10% screeding allowance to accommodate base settling and screed pipe impressions.
If your calculated need is under 1 ton (40 bags of 50-lb sand), purchasing bagged sand at a home improvement store is typically more cost-effective. For requirements exceeding 2 tons, bulk quarry delivery with a tandem dump truck significantly reduces per-unit costs.
| Sand Variety | Standard Specification | Bulk Density (lbs/yd³) | Tons per cu yd | Primary Construction Use |
|---|---|---|---|---|
| Washed Concrete Sand | ASTM C33 | 2,600 lbs/yd³ | 1.30 tons | Interlocking paver bedding layer (1" uncompacted) |
| Masonry Mortar Sand | ASTM C144 | 2,700 lbs/yd³ | 1.35 tons | Brick, stone, and cinder block mortar blending |
| Screened Play Sand | Washed Fine Silica | 2,400 lbs/yd³ | 1.20 tons | Children's sandboxes, volleyball courts, play areas |
| Dry Loose Bulk Sand | Commercial Bank Run | 2,500 lbs/yd³ | 1.25 tons | Underground utility pipe backfill and trench bedding |
| Wet / Compacted Sand | Saturated Damp | 3,000 lbs/yd³ | 1.50 tons | Compacted subgrade base fill and trench bedding |
Damp or partially wet sand expands significantly in volume—a physical phenomenon known as bulking—increasing apparent volume by up to 25% without adding solid sand grains. Relying on simple volume conversions without moisture density adjustments leads to severe cement-to-sand ratio errors in concrete and mortar mixes.
Installing pavers over fine play sand or unwashed bank-run sand causes catastrophic settling and rutting because rounded grains slide under vehicle loads. This calculator accounts for coarse, angular ASTM C33 concrete sand specifications to ensure a solid, self-locking 1-inch bedding layer.
Buying 50-lb retail bags for projects exceeding 1.5 tons can cost three to four times more than scheduling a local tandem dump truck delivery. This tool outputs both bag counts and bulk tons, enabling instant cost comparison before purchasing.
Uncompacted sand settles under plate compaction and hand tamping. Forgetting to apply a 10% compaction safety buffer leaves finished paver installations lower than adjacent walkways, curb borders, and garage thresholds.
Calculate rectangular patio pads, linear pipe trenches, or circular swimming pool foundations with exact mathematical geometry.
Pre-calibrated bulk densities for ASTM C33 concrete sand, ASTM C144 masonry mortar sand, dry silica play sand, and damp compacted subbase.
Instant breakdown of total cubic yards, cubic feet, US short tons, metric tonnes, 50-lb bags, and 60-lb commercial bags.
Customizable compaction and screed waste buffer (5% to 20%) to eliminate jobsite shortages during plate compaction.
