How Much Sand for a 4x5 Sandbox?
A 4 by 5 foot sandbox has 20 square feet of floor. Filled 10 inches deep, how much sand for a 4x5 sandbox comes to 16.7 cubic feet, or about 34 fifty-pound bags.
Volume and tonnage calculator →Sand by fill depth
| Fill depth | Cubic feet | 50 lb bags | Cubic yards |
|---|---|---|---|
| 6 in | 10.0 | 20 | 0.37 |
| 8 in | 13.3 | 27 | 0.49 |
| 10 in | 16.7 | 34 | 0.62 |
| 12 in | 20.0 | 40 | 0.74 |
A 50 lb bag of play sand holds roughly 0.5 cubic feet; check the bag, since brands differ.
Related: How Much Sand for a 10x10 Sandbox?
How deep to fill
Leave a few inches of the frame showing to keep sand inside. Six inches is enough for toddlers; older kids dig deeper, so 10 to 12 inches is better.
Choosing the sand
Look for washed, screened sand sold for play use. Avoid fine silica dust and sharp construction sand. Bulk mason sand is sometimes used for large boxes; ask the supplier whether it is washed.
Related: How Much Sand for an 8x10 Sandbox?
Cover and drainage
Lay fabric under the sand for drainage and weed control, and cover the box when not in use.
Common mistakes
Using the wrong sand type is the big one: sharp concrete sand or sand with pebbles is uncomfortable and can damage liners. Another is skipping the ground prep, expecting sand to hide bumps and slopes. It does not; it shifts and washes out.
Keeping it in place
Sand moves with wind, rain and use. A frame, edging or a cover keeps it where you put it. Where sand meets lawn, a border of pavers or timber stops it from spreading into the grass and makes mowing easier.
Measuring the area
Measure the footprint in feet, multiply for square feet, then multiply by the depth in feet. Divide cubic feet by 27 for cubic yards. Round shapes use 3.1416 times the radius squared. Measure twice; a small mistake in diameter changes the total more than you might expect.
Topping up later
Sand compacts and spreads over time, so expect to add a little each year. Keeping one or two spare bags on hand makes touch-ups easy, and buying the same type keeps the texture consistent.
Questions people ask
How many bags of sand for a 4x5 sandbox?
About 34 bags of 50 lb at 10 inches deep.
How many cubic feet of sand for a 4x5 sandbox?
About 16.7 cubic feet at 10 inches.
How deep should sand be in a sandbox?
About 6 to 12 inches, a few inches below the rim.
How much does a bag of play sand cover?
A 50 lb bag is roughly 0.5 cubic feet.
Related guides
- Fill Dirt vs Topsoil: Differences, Uses and Tons to Order
- How Much Sand for a 3x3 Sandbox?
- How Much Sand for a 4x4 Sandbox?
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