River rock calculator for Mississippi
Rock size changes ton coverage. A ton of 3-inch material covers about half the space covered by a ton of 1-inch material.
Enter your project dimensions
River rock coverage depends on stone size. To conceal the ground, use a layer near twice the rock diameter: 1-inch stone needs 2 inches, while 3-inch stone calls for 4 inches or more. The same ton then covers half as much space. This calculator figures it out using your bed dimensions and river rock's 2,700 lb per cubic yard weight. The delivered pile may also seem smaller than expected. One ton equals about three-fourths of a cubic yard. If fabric shows after spreading, the layer is too thin rather than the order being too small.
Plan your order
- Measure every bed or border in feet. Multiple-areas mode combines separate spaces.
- For 3/4 to 1 inch rock, use a 2 inch layer. Use 3 to 4 inches for 1 to 3 inch pieces, and 4 to 5 inches when the rock is larger.
- Divide cubic feet by 27 for cubic yards, then multiply yards × 1.35 for tons.
Ton coverage by stone size
| Stone size | Layer depth | 1 ton covers |
|---|---|---|
| 3/4-1" river rock | 2 inches | ≈ 120 sq ft |
| 1-3" river rock | 3 inches | ≈ 80 sq ft |
| Large river rock (2-4") | 4-5 inches | ≈ 53 sq ft |
| Oversize accents | single layer | 35-50 sq ft |
| Project | Typical size | Depth | Volume | Weight |
|---|---|---|---|---|
| Foundation border | 40 x 3 ft | 3" | 1.1 yd³ | 1.5 tons |
| Dry creek bed | 25 x 4 ft | 4" | 1.2 yd³ | 1.7 tons |
| Accent beds | ≈ 150 sq ft | 2" | 0.9 yd³ | 1.3 tons |
| Downspout splash zones, x4 | 3 x 2 ft each | 3" | 0.2 yd³ | 0.3 tons |
| Front-yard xeriscape | ≈ 600 sq ft | 3" | 5.6 yd³ | 7.5 tons |
Install fabric before rock
Without landscape fabric, bare soil gradually takes in the rock. Stones settle lower each season, weeds push up, and after three years the bed needs more material that a few dollars a roll of fabric could have avoided. Spread non-woven fabric first, secure it with pins, and place the rock over it. For drain rock carrying water, enclose the stone in fabric rather than putting fabric beneath it.
Natural-looking rock bed ideas
- Combine sizes by using a 1-2 inch base with clusters of bigger stones. One size throughout can look overly formal.
- For a dry creek bed, sink the largest anchor stones a third of the way down. They will look like water left them there.
- Hose the rock down once it is spread. Quarry dust from delivery can dull its color before that first rinse.
- At foundation edges, lay fabric beneath 3 to 4 inches of rock and pitch the surface gently outward. The bed has a clean edge and carries roof runoff along the wall.
- Use a low blower to remove leaves. A rake can throw stones into the grass, where mower blades may hit them.
Example: a 200-square-foot bed
For one-inch river rock spread 2 inches deep, 200 x 0.167 = 33 cubic feet = 1.2 cubic yards, about 1.7 tons. Order two tons. Use the extra to double-layer the front edge, where coverage thins first and people notice it most.
Rock versus mulch over five years
River rock costs more up front but generally keeps the same appearance through year five. Mulch costs less per delivery, feeds the soil, and needs a refresh every year or two. Rock can heat nearby soil in summer, so mulch usually belongs in planted beds, while rock suits borders, drainage lines, and edges. Enter the same dimensions in both calculators, and the tonnage difference shows the price difference right away.
River rock coverage and price FAQs
How can I calculate the river rock I need?
What square footage will 1 ton of river rock cover?
What area does 50 lbs of river rock cover?
What is the cost of a ton of river rock?
What depth should river rock have?
Is landscape fabric needed under river rock?
Can river rock be installed over mulch?
What does a yard of river rock weigh?
Other calculators
River rock bed upkeep
River rock, large river rock, and drain rock sold by the ton with free delivery included.
