Calculator, Coverage, Conversion
See how much stone or rock you need for your house or project
Coverages
Building Stone & Flagstone
See individual product listing for estimated coverage per ton.
Gravels, Sand & Soils, Mulches
162 sq. ft. @ 2" depth per cubic yard
128 sq. ft. @ 2 ½" depth per cubic yard
108 sq. ft. @ 3" depth per cubic yard
81 sq. ft. @ 4" depth per cubic yard
Pine Straw Bales
3050 square feet per bale @ 2" + 
Bags & Buckets
A ½ cubic foot bag of gravel will cover 2.37 sq. ft. @ 2 ½" depth
A 1.15 cubic foot bag of rubber mulch will cover 6.9 sq. ft. @ 2" depth
A 2 cubic foot bag of mulch will cover 9.48 sq. ft @ 2 ½" depth
A 3 cubic foot bag of mulch will cover 14.22 sq. ft. @ 2 ½" depth
A ¾ cubic foot 5 gallon bucket of material will cover 3.56 sq. ft. @ 2 ½" depth
Conversions
1 Cubic Yard Equals:
27 cubic feet
(54) ½ cubic foot bags
(36) 5 gallon buckets
(23.5) 1.15 cubic foot rubber mulch bags
(13.5) 2 cubic foot mulch bags
(9) 3 cubic foot mulch bags
Tons Per Cubic Yard: Gravels
Lava Rock (all) = .5 tons (1000 lbs.) per cubic yard
Eastern Sunrise = .9 tons (1800 lbs.) per cubic yard
Crimson = 1.1 tons (2200 lbs.) per cubic yard
Lime Rock (57 & 89) = 1.2 tons (2400 lbs.) per cubic yard
Lime Rock (919) = 1.25 tons (2500 lbs.) per cubic yard
River Rock (all) = 1.325 tons (2650 lbs.) per cubic yard
Granite (all) = 1.325 tons (2650 lbs.) per cubic yard
Marble (all) = 1.35 tons (2700 lbs.) per cubic yard
Cubic Footage Per Ton Of Building Stone & Flagstone
*15 cubic feet per ton, or 133 lbs. per cubic foot
Note: The true cubic footage weights are 145160 pounds per cubic foot, for solid unbroken stone, or about 13 cubic feet per ton on average. Being unlikely that you will be able to stack the stone that tightly, using the true numbers would result in an erroneous quantity being delivered to your site, further resulting, upon completion of the job, in hostile thoughts being pointed in our general direction, therefore, we have adjusted this number to be more consistent with reality in order to circumvent those aforementioned hostile thoughts and have happy customers in perpetuity. So you don't have any leftovers we thought it best this way.
Formula Basics
Convert all measurements from feet and inches into their decimal equivalent in feet only.
Example: You have a measurement of 6' 9"
(9"/12") + 6' = 6.75'
Formulas
Square Footage (squares & rectangles)
(length x width) = Square Footage

Square Footage (circles)
(radius x radius) 3.14159 = Square Footage

Square Footage (right triangles)
(1/2 x width) length = Square Footage

Cubic Footage
(square footage x depth) = Cubic Footage

Cubic Yardage
(cubic footage / 27) = Cubic Yardage

Circumference of a circle
(diameter) 3.14159 = Circumference

Calculate Product Quantity Needed
Gravel, Mulch, Sand & Soils
1) Figure out the square footage to be covered
2) Multiply the square footage by the depth desired to get the cubic footage
3) Divide the cubic footage by 27 to get the cubic yards needed
Example: A rectangular landscape bed is 12' 8" long and averages 5' 6" wide and the depth desired is 2 ½" deep.
(12.66' x 5.5) = 69.3 square feet
(69.3 x .208) = 14.414 cubic feet
(14.414 / 27) = .534 cubic yards needed
Flatwork (Patios, walls, etc.)
1) Figure out the square footage to be covered
2) Get the coverage per ton of the product desired
3) Divide the square footage needed by the coverage per ton
Example: A patio or wall is 20' long and 8' wide or high and you would like to use Buff Patio flagstone that has a coverage of 110130 square feet per ton.
(20' x 8') = 160 square feet
Average coverage is 120 square feet per ton
(160 / 120) = 1.333 tons needed
Stacked Stone Walls & Waterfalls
1) Determine the average length, the average height and the average width of the stone in feet
2) Multiply the length by the width by the height to get the cubic footage
3) There is about 15 cubic feet in a ton of building stone or flagstone so divide the cubic footage by 15 to determine the quantity of stone needed in tons
Example: A 20' long stacked stone wall that is 1' thick and 2' tall
Length = 20', Height = 2', Width = 1'
(20' x 2' x 1') = 40 cubic feet
(40 / 15) = 2.667 tons of stone needed
