Landscape Supply Materials Calculations

Formulas & Conversions
Quick reference

1728 cubic in. = 1 cubic ft.
27 cubic ft. = 1 cubic yard
144 square in. = 1 square ft.
9 square ft. = 1 square yard
1 ton = 2000 lbs.
1 acre = 43,560 sq. ft.


Area and Circumference of a Circle

Cubic Yard Formula

W' x L' x D"
* Width and length in feet,
depth in inches

Calculate Materials

Calculate It!

Use this comprehensive set of formulas and calculators to help you determine the quantity of building or landscape material you will need for your project. Don’t see a way to calculate the specific material you need? Contact Us and ask to speak to a sales person. We’ll be happy to help.

Volume & Perimeter

Most products are sold in cubic feet which is a measure of volume. Adding and subtracting rectangular, circular, and triangular volumetric measurements may assist you in planning efforts with your landscaping project. Volume calculations are necessary when using aggregate (rock), sand, soil, mulch, compost, and concrete. Obtaining the measurements in the diagram below will allow you to use our Volume Calculator or Permimeter Calculator to estimate the amount of materials for your project.

Materials Coverage

Landscape supplies tend to vary in depth requirements depending on the product and depending on the application. Keep in mind that some materials may compact more than others when estimating the amount of materials to order. Consult with us for a more detailed estimate of materials. The following table is a general guide that may help you estimate the amount of product needed for common landscape projects.

Brick Veneer (wall) 6-7 bricks per sq. ft.
  Paving (flat) 4.5 bricks per sq. ft.
Fieldstone / Wallstone * Head size, single row 30-40 sq. ft. per ton
  Head size, double row 15-20 sq. ft. per ton
Flagstone * 2” minus 50-80 sq. ft. per ton
  1 ½” 80-100 sq. ft. per ton
  1 ¼”minus 110-140 sq. ft. per ton
  1” minus 120-160 sq. ft. per ton
Ledgestone * 3”-5” thickness 30-40 sq. ft. per ton
River Cobbles * Large (6-12”) 30-40 per sq. ft. per ton
  Small  (2-6”) 70-80 per sq. ft. per ton

* all natural stone calculations are approximate due to variations in density and/or thickness

Weight Per Yard

Product weight varies according to the batch, moisture conditions, and other variables. Use the following table as a general guide to determine the weight of a given product type when ordering by the yard.

Bark & Mulch 600-800
Soil Mixes 1300-1650
Lava Rock 1480-1720
Gravel 2500-2600
Pebbles 2300-2800
Cobbles 2800-3000
Decomposed Granite 2600
Sand 2800
Concrete Mix 3240

* weights vary according to moisture content