Key Takeaways
- A 10x10 foot area is 100 square feet
- At 4 inches deep with 10 percent FHWA allowance, you need about 1.9 tons
- At 2 inches deep, you need about 0.95 tons
- Use the main gravel calculator for exact figures with your material’s density
- Projects with weight need multiple layers, not one decorative depth
This calculation follows standard aggregate industry methodology.
Cubic yard is a unit of volume equal to a cube measuring 3 feet on each side, commonly used in the US for ordering gravel and other aggregates.
Density in gravel calculations refers to the weight of material per unit volume, typically measured in tons per cubic yard or tonnes per cubic metre.
A 10 by 10 foot square is 100 square feet. At a typical density of 1.4 tons per cubic yard, that comes to about 1.9 tons of gravel at a 4 inch depth once a 10 percent allowance is added, or roughly 0.95 tons at 2 inches. The exact figure depends on the depth you choose and the material’s density, so here is the arithmetic at each of the depths a 10x10 area is commonly used for.
The numbers by depth
[ORIGINAL DATA]
| Depth | Volume | Weight before allowance | With a 10% allowance |
|---|---|---|---|
| 2 inches | 16.7 cu ft (0.62 cu yd) | 0.86 tons | 0.95 tons |
| 3 inches | 25 cu ft (0.93 cu yd) | 1.30 tons | 1.43 tons |
| 4 inches | 33.3 cu ft (1.23 cu yd) | 1.73 tons | 1.90 tons |
| 6 inches | 50 cu ft (1.85 cu yd) | 2.59 tons | 2.85 tons |
These figures use a washed stone at 1.4 tons per cubic yard Aggregate Industries, which is the value quoted most often for #57 gravel. If you are laying pea gravel, crusher run, or another material, the tonnage shifts with the density: crusher run runs heavier, closer to 1.5, and a rounded decorative stone often sits a little lighter.
Where these numbers come from
The area is fixed at 100 square feet, so only the depth changes the volume. Multiplying 100 square feet by a depth in feet gives cubic feet: at 4 inches, that is 100 times one third of a foot, which is 33.3 cubic feet. Divide by 27 to convert to cubic yards, then multiply by the density to get a weight in tons. The last step adds an allowance, typically 10 percent, for spillage, uneven ground and the fact that a compacted layer needs more material than its finished depth suggests.
This is exactly the working the main gravel calculator shows for any area and depth, not only 10x10: it is quoted here as a fixed reference so you can check the arithmetic without opening the tool. A 10x10 space at 4 inches, in fact, is exactly half of the 20 by 10 foot, 4 inch worked example on the calculator’s own page, which comes to 3.8 tons for double the area.
What a 10x10 area is usually for
Ten by ten feet is a common size for a small patio, a garden shed base, a fire pit surround, or a modest gravel bed. If the project is a shed base or something that will carry weight, a single decorative depth is often not enough on its own: a compacted base layer under a thinner surface layer is the more durable build, and the shed base calculator and paver base calculator both handle a two layer stack rather than one average depth.
For a different size, the square feet calculator takes any area directly, and the main calculator takes a length and width if the space is not a perfect square. Both return tons, cubic yards, cubic metres and a bag count together, with the same allowance and rounding this page describes.
Editorial note: This article is reviewed for accuracy and updated regularly. All calculations use standard industry formulas. For the latest density figures, consult your gravel supplier directly.
Frequently asked questions
How much gravel do I need for a 10x10 foot area?
At 2 inches deep, about 0.95 tons. At 3 inches, about 1.43 tons. At 4 inches, about 1.9 tons. All figures include a 10 percent allowance for waste and compaction. Use the gravel calculator for your specific material.
What can I build with a 10x10 foot area?
Common projects include a small patio, garden shed base, fire pit surround, or decorative gravel bed. For shed bases or anything carrying weight, use a compacted base layer under a thinner surface layer.
How do I calculate gravel for an irregular shape?
Split the area into rectangles, triangles, or circles. Calculate each shape’s area separately, then add them together. The square feet calculator handles different shapes and returns the tonnage.
Should I use #57 gravel or pea gravel for a 10x10 area?
It depends on the use. For decorative beds or pool surrounds, pea gravel looks better and feels comfortable. For paths with foot traffic or shed bases, crushed stone or #57 gravel provides better stability and drainage.