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How Much Sand for a 5x5 Sandbox?

How much sand for a 5x5 sandbox: about 20.8 cubic feet if you fill it 10 inches deep, which is around 42 bags of 50 lb play sand.

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Sand by fill depth

Fill depthCubic feet50 lb bagsCubic yards
6 in12.5250.46
8 in16.7340.62
10 in20.8420.77
12 in25.0500.93

A 50 lb bag of play sand holds roughly 0.5 cubic feet; check the bag, since brands differ.

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

Bagged play sand is washed and screened. For big boxes, bulk washed sand can cost less; make sure it is clean and soft, not a coarse concrete sand.

Keep it clean

Lay fabric under the sand for drainage and weed control, and cover the box when not in use.

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.

Common mistakes

Underestimating depth and forgetting extra for settling and spreading are common. So is laying sand straight on sod, which lets grass and weeds come through. Clear and level the ground first.

Bags vs bulk

Bagged sand is convenient for small jobs and easy to carry in a car. Once you pass about half a cubic yard, bulk sand from a landscape supplier usually costs much less. Ask whether the bulk sand is washed and screened.

Topping up later

After a season of use, the level usually drops an inch or more. A few bags of the same sand restore it; rake the old sand loose first so the new layer blends in.

Questions people ask

How many bags of sand for a 5x5 sandbox?

About 42 bags of 50 lb at 10 inches deep.

How many cubic feet of sand for a 5x5 sandbox?

About 20.8 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.

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