Landscape Materials Calculator - Estimate Your Project Needs | CMXOUTDOOR Material Coverage Calculator Sand, Soil, Gravel, and River Rock Calculator Enter the dimensions below to calculate the required amount of material needed for coverage. Length (in feet): Width (in feet): Depth (in inches): Calculate Mulch Coverage Calculator Mulch Coverage Calculator Enter the dimensions below to calculate the required amount of mulch needed for coverage. Length (in feet): Width (in feet): Depth (in inches): Calculate