Here's how to figure it in US measurements:
Enter the square footage to cover with rubber crumb.
Enter depth in inches that you plan the rubber crumb layer to be.
Enter your Size Code# from below.
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Size Code #
1 = is a mix of 10 to 40 mesh (0.0787” to 0.0165”).
2 = is a mix of 5 to 10 mesh (0.157” to 0.0787).
3 = is a mix of 1 to 5 mesh (0.23” to 0.157”).
4 = is a mix of 1/4th inch to 1 mesh (0.25 to 0.23”).
5 = is a mix of 3/8th inch to 1/4 inch (0.375” to 0.25”).
#1 is often used for carpet backing, spray on tread, moldings, etc.
#2 is often used in turf fields.
#3, #4, #5 are often used in playgrounds, horse arena footings, etc.
#5 is often used as landscaping mulch and under swing sets.
Formula:
#1 = 27.35 pounds per cubic foot.
#2 = 28.40 pounds per cubic foot.
#3 = 30.10 pounds per cubic foot.
#4 = 33.40 pounds per cubic foot.
#5 = 34.00 pounds per cubic foot.
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