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LANDSCAPE MATERIAL CALCULATOR   Use our landscape material calculator below to estimate the area of a rectangular, circular, or triangular space to see how much gravel, mulch,topsoil, etc. you need for your project.   Rectangular Beds Gravel driveways use 10 ft. for width / Rectangular/Square Beds What type of material do you want? MulchCompostSoil MixesSandTop SoilRock 1 1/2”Rock 3/4”Rock 3/8”Breeze/Roadbase1 1/2” Rhyolite3/4”, 1 1/2” Lava Rock 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'll 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/Roadbase1 1/2” Rhyolite3/4”, 1 1/2” Lava Rock What is the diameter? (in feet)  How thick (deep) do you want to fill (in inches)?  You'll need  for your project. Triangular Beds (Measure the two sides that meet at the 90° angle) What type of material do you want? MulchCompostSoil MixesSandTop SoilRock 1 1/2”Rock 3/4”Rock 3/8”Breeze/Roadbase1 1/2” Rhyolite3/4”, 1 1/2” Lava Rock What is length of the first side? (in feet) What is length of the second side? (in feet) How thick (deep) do you want to fill (in inches)? You'll need for your project.