Sand calculator
Area, depth and sand density: you get the volume with waste, the weight and the 55 lb bags or bulk bags you need.
Purchase quantity
0.53 m³
Net measurement: 0.5 m³ · Waste 5 %
- Sand in 25 kg bags34 bag
- Sand weight0.84 t
- Sand in 1 t bulk bags1 bulk bag
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How it's calculated (visible formula)
volume = area × depth × (1 + waste); weight = volume × density
- Net geometric measurement, no waste.
- Adjustable waste % for cuts and breakage.
- Purchase rounded up to sellable units (boxes, bags, buckets, boards).
How to calculate it, step by step
- Measure the area and depth of the sand layer.
- Multiply for the volume and add 5% waste.
- Convert to weight with sand density (100 lb/ft³ dry).
- Divide by bag weight or round up to bulk bags.
- If the sand is damp, expect more weight and a little more volume.
Worked example: 108 sq ft sandbox, 2 in leveling layer
- 108 sq ft × 2 in ≈ 0.67 yd³; +5% → 0.7 yd³
- ≈ 1,850 lb (840 kg)
→ 34 bags of 55 lb, or 1 bulk bag.
Common mistakes
- Using fine play sand for mortar or bases.
- Ignoring bulking of damp sand.
- Buying bags for over a cubic yard.
Pro tips
- For paver bedding use washed coarse concrete sand, never beach sand.
- For sandboxes, buy washed play sand without fines or stones.
- Keep sand covered — wet sand is heavier and upsets mortar mixes.
- Adjust mixing water when sand arrives damp.
From calculation to quote
Add labour, overhead and your margin, and generate the professional PDF.
FAQs
- How much does a cubic yard of sand weigh?
- About 2,700 lb dry; up to 3,200 lb wet.
- How many 50 lb bags in a yard?
- About 54.
- What sand for pavers?
- Coarse washed concrete sand for bedding, fine dry polymeric or jointing sand for the gaps.
- How many bags of sand for a 6 × 6 ft sandbox?
- At 12 in deep that's 1.33 yd³ — about 72 bags of 50 lb.
- What sand for mortar?
- Washed masonry sand.
- Is wet sand heavier?
- Yes, up to 20% heavier than dry.
Sources and standards
Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.