26+ 2 Inch River Rock Calculator. To determine how much gravel you need, determine the volume that the gravel must cover. Including by volume (in cubic yards) or weight (in tons).

This calculator determines the volume and weight of river rock needed to fill a specified area, accounting for wastage, based on the area’s dimensions and the rock’s density. Perfect for landscaping, drainage projects, and garden design. You’ll get results in cubic yards or square feet.






