River Rock Calculator

How to calculate

The rectangular volume approximates the space occupied by the stone layer, including voids. Large stones may need more depth to cover exposed soil.

Worked example

Length (ft): 16 · Width (ft): 12 · Material depth (in): 3 · Bag yield (cu ft): 0.5 · Extra material (%): 10.

These inputs produce 1.96 cubic yards to order. Change the measurements above to match your project.

Before you order

Ask the supplier what depth suits your chosen rock size. Do not use a generic gravel density to convert large decorative rock to tons.

For an irregular footprint, split the project into rectangles. Calculate each section and combine unrounded quantities before rounding the final order. Ask the supplier to confirm product yield and available package sizes.

Common questions