Bags of Sand (50 lb)
25
Weight
1,250 lbs
Volume
12.5 cu ft
Cost (bags)
$125
Bags of Sand Needed
25
50 lb bags
Total Weight
1,250 lbs
(0.63 tons)
Volume
12.5 cu ft
(0.46 cu yd)
At $5 per 50 lb bag
25
sq ft
32
alternative
Safety Note
The CPSC recommends a minimum 12″ of sand for fall protection under play equipment. Use pre-washed play sand only.
Inputs
Result
Area = 5 × 5 = 25 sq ft. Volume = 25 × 6/12 = 12.5 cu ft. Weight = 12.5 × 100 = 1,250 lbs. Bags = ceil(1250/50) = 25 bags at $5/bag = $125.
Inputs
Result
Area = π × 3² = 28.27 sq ft. Volume = 28.27 × 3/12 = 7.07 cu ft. Weight = 7.07 × 100 = 707 lbs. Bags = ceil(707/50) = 15 bags at $5/bag = $75.
Inputs
Result
Area = 10 × 8 = 80 sq ft. Volume = 80 × 12/12 = 80 cu ft = 2.96 cu yd. Weight = 8,000 lbs. Bags = 160 at $800. Bulk at $35/cu yd = $104. Bulk saves $696 for this large sandbox.
A 5×5 foot sandbox with 6 inches of sand needs 12.5 cubic feet of sand, which weighs about 1,250 lbs. You will need 25 bags of 50 lb play sand at a cost of roughly $125. For a shallower 3-inch fill, cut those numbers in half.
| Depth | Volume (cu ft) | Weight (lbs) | 50 lb Bags | Cost |
|---|---|---|---|---|
| 3" (Toddler) | 6.25 | 625 | 13 | $65 |
| 6" (Standard) | 12.5 | 1,250 | 25 | $125 |
| 9" (School Age) | 18.75 | 1,875 | 38 | $190 |
| 12" (Fall Protection) | 25 | 2,500 | 50 | $250 |
For casual play, 4–6 inches of sand is sufficient. The Consumer Product Safety Commission (CPSC) recommends a minimum of 12 inches of loose-fill sand under and around playground equipment for fall protection. For toddlers, 3 inches is enough for sensory play.
Use pre-washed, screened play sand specifically labeled for sandbox use. Avoid construction sand, beach sand, or masonry sand — they may contain silica dust, sharp particles, or contaminants. Play sand is tumbled to round the grain edges and washed to remove dust.
| Sand Type | Safe for Kids? | Cost/50 lbs | Notes |
|---|---|---|---|
| Play Sand | Yes | $4–$6 | Washed, rounded grains |
| Construction Sand | No | $2–$3 | Contains silica dust |
| Beach Sand | No | Free | Bacteria, salt, shells |
| Kinetic Sand | Yes | $15–$20 | Indoor use only, moldable |
For small sandboxes (under 1 cubic yard), bagged sand at $4–$6 per 50 lb bag is more practical. For larger sandboxes needing more than 1 cubic yard (~2,700 lbs), bulk delivery at $25–$45 per cubic yard saves 30–50% compared to bags.
| Amount | Bag Cost | Bulk Cost | Savings |
|---|---|---|---|
| 0.5 cu yd (1,350 lbs) | $135 (27 bags) | $18 + delivery | Bags easier |
| 1 cu yd (2,700 lbs) | $270 (54 bags) | $35 + delivery | ~$135 |
| 2 cu yd (5,400 lbs) | $540 (108 bags) | $70 + delivery | ~$370 |
Replace sandbox sand every 1–2 years for hygiene. Rake and turn the sand monthly to prevent compaction and mold. Cover the sandbox when not in use. If sand becomes wet, contaminated, or develops an odor, replace it immediately regardless of age.
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Last Updated: Mar 9, 2026
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