How Much River Rock for 3,000 Square Feet?
How much river rock for 3,000 square feet depends on depth. At 3 inches you need about 27.78 cubic yards, roughly 37.5 tons at 1.35 tons per yard. Each inch of depth over 3,000 square feet adds about 9.26 yards.
Volume and tonnage calculator →River rock for 3,000 sq ft by depth
| Depth | Cubic yards | Tons | Tons +10% |
|---|---|---|---|
| 2 in | 18.52 | 25.0 | 27.5 |
| 3 in | 27.78 | 37.5 | 41.2 |
| 4 in | 37.04 | 50.0 | 55.0 |
Working it out
- 3,000 sq ft × (3 ÷ 12) ft = 750.0 cubic feet.
- ÷ 27 = 27.78 cubic yards.
- × 1.35 tons per yard = 37.5 tons.
About river rock
River rock is smooth, water-worn stone sold in sizes from about 3/4 inch to several inches. Larger sizes cover fewer square feet per ton at the same depth because the voids between stones are bigger. Expect the weight to fall in the range of 1.25 to 1.45 tons per yard.
Before the truck comes
- Measure odd shapes in pieces. Split curves and L-shapes into rectangles and add them.
- Add a margin. About 10 percent covers compaction and low spots.
- Bulk or bags. Bulk delivery is the practical choice here.
- Prep first. Remove sod, compact the subgrade and set edging before the stone arrives.
Use the volume and tonnage calculator for any other size.
Where river rock fits
Best suited to:
- Dry creek beds and drainage swales
- Decorative borders and planting beds
- Around downspouts to stop splash erosion
Less suited to:
- Walking surfaces
- Driveways
- Bases under slabs or pavers
Quick reference numbers
- Per inch over 100 sq ft: about 0.42 tons of river rock (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.2 tons.
- Another size for comparison: a 10x20 area at 4 inches takes about 3.3 tons.
- Weight used here: about 1.35 tons per cubic yard.
Where estimates go wrong
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many tons of river rock for 3,000 square feet?
About 37.5 tons at 3 inches deep.
How many cubic yards of river rock for 3,000 square feet?
About 27.78 yards at 3 inches.
How much river rock for 3,000 square feet at 2 inches?
About 25.0 tons, or 18.52 cubic yards.
How much does a yard of river rock weigh?
About 1.25 to 1.45 tons.
Should I add extra?
Yes, about 10 percent is a common allowance.
Related guides
- How Much Does a Ton of River Rock Cover?
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Ton of Gravel Cover? Depth Chart
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