Trying to decide how much soil you'll need to redo the flowerbed our front, or how much sand it will take to fill up the hole from the old swimming hole. Below are some formulas to help out. If you have any trouble give our office a call and one of our customer service representatives would be happy to figure the area(s) for you. Squares & Rectangles Area: Length X Width Ex: Length=6' Width=4' 6'X4'=24sq.ft. Depth: Inches deep/ 12= decimal depth Ex: depth=3" 3"/12=.25 Cubic Feet: Area X Decimal Depth = Cu. Ft. Ex: 24 sq.ft. X .25 = 6 cu. ft. Tons Needed: Weight per Cubic Foot X Cubic feet needed Ex: Product=100lbs. Per cubic foot 65 Cubic foot needed 100 X 65=6500lbs./2000=3.25 Tons Yards Needed: Cubic Feet/27 Ex: 6 cu. ft./27= .22 cu yds. or ¼ cu. yd. Circles Area: Diameter X .7854= sq.ft. Ex: Diameter=12' 12' X 12' X .7854=113.1 sq.ft. Circumference: Diameter X 3.1416 Ex: Diameter=12' 12' X 3.1416=37.7 Linear Feet Note: Circumference is the running feet around the border of a circle. Tid Bits: A ton of most loose stone products covers roughly 80 sq.ft., 3" deep. A yard always covers 108 sq.ft., 3" deep. Always figure compaction for areas over 6" deep Compaction for sand and soil is about 15 to 20% On most products a ton is equal to 75% of a cubic yard. For any other shapes you can fax, e-mail, or mail a rough drawing to our office.