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How Much River Rock for a 4x60 Walkway?

How much river rock for a 4x60 walkway: at 3 inches deep you need about 2.22 cubic yards, which is roughly 3.0 tons at 1.35 tons per yard. The walkway covers 240 square feet, so every inch of depth adds about 0.74 yards.

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The math for a 4x60 walkway

  1. Area: 4 × 60 = 240 sq ft.
  2. Depth in feet: 3 ÷ 12 = 0.250 ft.
  3. Cubic feet: 240 × 0.250 = 60.0 cu ft.
  4. Cubic yards: ÷ 27 = 2.22 yd³.
  5. Tons: × 1.35 = 3.0 tons.

The volume and tonnage calculator does this for any size.

River rock needed by depth

DepthCubic yardsTons (approx.)Tons +10%
2 in1.482.02.2
3 in2.223.03.3
4 in2.964.04.4

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. Ask your supplier for their own tons-per-yard figure, since stone source and moisture shift it.

Preparing the walkway

Dig the path a few inches below grade, compact the bottom, add fabric if needed and install edging on both sides so the material stays on the walk. Since the walkway carries foot traffic, a little extra depth is cheap insurance.

Ordering tips

  • Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
  • Delivery size. 3.3 tons fits in a single typical dump truck load; small loads may carry a delivery fee. See how many tons of gravel in a dump truck.
  • Bulk vs bags. At this size bulk delivery is usually the practical choice.
  • Where it drops. Have the truck dump as close to the walkway as firm ground allows.

Where river rock fits

Works well for:

  • Dry creek beds and drainage swales
  • Decorative borders and planting beds
  • Around downspouts to stop splash erosion

Think twice for:

  • 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 15x30 area at 3 inches takes about 5.6 tons.
  • Weight used here: about 1.35 tons per cubic yard.

Where estimates go wrong

  • Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
  • Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
  • Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
  • Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.

Questions people ask

How many tons of river rock for a 4x60 walkway?

About 3.0 tons at 3 inches deep, or 3.3 tons with 10 percent extra.

How many cubic yards is a 4x60 walkway at 3 inches?

About 2.22 cubic yards.

How much does a cubic yard of river rock weigh?

Usually around 1.25 to 1.45 tons, depending on stone size, fines and moisture.

How deep should river rock be for a walkway?

The table above shows 2 to 4 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.

How many square feet is 4x60?

240 square feet.

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