Construction & ContractorsBags & Tonnage
Sand Calculator
Calculate sand requirements in cubic yards, US short tons, and 50-lb bag counts for paver bedding, masonry, and sandboxes.
Calculation Results
Sand Tonnage & Bag Formula
Cubic Yards = (L × W × Depth / 12) / 27 | Tons = Cu Yd × 1.35 | 50-lb Bags = (Tons × 2,000) / 50- Dry Sand Density: Approximately 2,700 lbs per cubic yard (~1.35 tons/cu yd). Damp sand can weigh up to 1.5 tons/cu yd.
- Paver Bedding: A uniform 1-inch bedding layer of coarse concrete sand (ASTM C33) is required beneath interlocking pavers.
- Bag Yield: 1 cubic yard yields approximately 54 50-lb bags.
Step-by-Step Worked Example
Scenario: Bedding sand layer for a 20 ft × 15 ft paver patio at 1 inch depth
Calculation Steps:
- Cubic Feet = 20 × 15 × (1 / 12) = 25.00 cu ft
- Cubic Yards = 25.00 / 27 = 0.93 cu yd
- Total with 10% Waste = 0.93 × 1.10 = 1.02 cu yd
- Tonnage = 1.02 cu yd × 1.35 tons/cu yd = 1.38 tons (2,760 lbs)
- 50-lb Bags Needed = 2,760 / 50 = 56 bags
- Bulk Cost = 1.38 tons × $38.00 = $52.44 | Bagged Cost = 56 × $4.75 = $266.00
Result: The project needs 1.02 cubic yards (1.38 tons or 56 50-lb bags). Buying bulk saves over $213 compared to retail bags.
How to Use This Calculator
- 1Input the dimensions in feet and depth in inches.
- 2Review both bulk dump-truck tonnage and retail bag counts.
Assumptions & Limitations
- Estimates are based on standard national averages and current prevailing construction materials and contractor rates.
- Actual trade bids may fluctuate according to local building code requirements, permit fees, and site topography.
- Always obtain multiple written bids from licensed, bonded, and insured contractors before commencing work.
Frequently Asked Questions
What kind of sand should be used under pavers?
Always use coarse concrete sand (ASTM C33 specification) for paver bedding. Never use fine play sand or masonry sand beneath pavers, as it washes away and causes uneven settling.
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