 Irregular areas

Access our Bulk Landscape Materials Calculator Here - Click on the image above.For estimating quantity needed for irregular areas break the area up into smaller workable shapes. Measure each of them and assign them a letter. Calculate square feet for each and add the square footage together to figure total needed.

Rectangle

1. Measure Length and Width (in feet)
2. Length x Width = square feet
3. Determine desired depth of material (see recommended depths and chart below)
4. Square feet divided by sq. ft. per yard (from chart) = cubic yards needed
5. Example: A rectangular area 16 feet long by 10 feet wide and you want 4 inches deep of stone.
6. Calculations:
7. 16 x 10 = 160 square feet
8. 160 divided by 81 = 2 cubic yards (81 comes from the chart, 81 is how many square feet 1 cubic yard covers at a 4 inch depth)

Triangle

1. Measure length and width of 2 sides
2. Length x Width x 0.5 = square feet
3. Square feet divided by sq. ft. per yard (from chart) = cubic yards needed
4. Example: Given a triangle are where one side is 40 feet long, one side is 10 feet long and you want 4 inches deep of mulch or stone
5. Calculations:
6. 40 x 10 x 0.5 = 200 square feet
7. 200 divided by 81 = 2.5 cubic yards (81 comes from the chart)

Circle

1. Determine radius (1/2 distance of diameter or distance across)
2. Formula: Radius x Radius x 3.14 = square feet
3. Square feet divided by sq. ft. per yard (from chart) = cubic yards needed
4. Example: Given a circle 30 feet across (15 ft radius) and you want 3 inches deep
5. Calculations:
6. 15 x 15 x 3.14 = 706.5 square feet
7. 706.5 divided by 108 = 6.5 cubic yards

Conversion Chart – Square Feet to Cubic Yards

Converts square feet to cubic yards 1 cubic yard will cover the following amount of square feet at the given depth.

• 1/4" deep 1296 square feet
• 1" deep 324 square feet
• 2" deep 162 square feet
• 3" deep 108 square feet
• 4" deep 81 square feet
• 6" deep 54 square feet
• 12" deep 27 square feet

Recommended Depth of Materials

• Bark Mulches 3"
• Stone less than 1" diameter 3"
• 1-1 1/2" Riverstone 4"
• Soil for Lush Lawns 4+"
• Garden Soil in Flower Beds 6-12"
• Lawn topdressing 1/4"
• Pathways 4"