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How Much Sand for a 4x6 Sandbox?

How much sand for a 4x6 sandbox: about 20.0 cubic feet if you fill it 10 inches deep, which is around 40 bags of 50 lb play sand.

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Sand by fill depth

Fill depthCubic feet50 lb bagsCubic yards
6 in12.0240.44
8 in16.0320.59
10 in20.0400.74
12 in24.0480.89

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

Fill depth

Fill a sandbox about 2 to 4 inches below the rim so sand stays in during play. Most kids are happy with 8 to 12 inches of sand.

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.

Cover and drainage

A cover keeps out rain, leaves and animals. Put landscape fabric on the bottom so water drains while weeds stay out.

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.

Measuring the area

Mark the outline on the ground first with paint or a string so measurements match the real shape. Then measure the longest and widest points and the planned depth. Converting to yards and tons is simple arithmetic once those numbers are right.

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.

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.

Questions people ask

How many bags of sand for a 4x6 sandbox?

About 40 bags of 50 lb at 10 inches deep.

How many cubic feet of sand for a 4x6 sandbox?

About 20.0 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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