Calculators Material Calculators Rectangular Beds What type of material do you want? MulchCompostSoil MixesSandTop SoilRock 1 1/2”Rock 3/4”Rock 3/8”Breeze/Roadbase How wide is the area? (in feet) How long is the area? (in feet) How thick (deep) do you want to fill? (in inches) You will need for your project. Circular Beds What type of material do you want? MulchCompostSoil MixesSandTop SoilRock 1 1/2”Rock 3/4”Rock 3/8”Breeze/Roadbase What is the diameter? (in feet) How thick (deep) do you want to fill? (in inches) You will need for your project.