 GENERAL FORMULAS Square Footage Inside of a Circle: Length x Width x .7854 = Square Feet Length Around a Circle: Diameter x 3.1416 = Linear Feet Around a Circle General Quantity Formulas: Length x Width = Square Feet Square Feet x Depth = Cubic Feet Cubic Feet / 27 = Cubic Yards Note: When figuring quantities, remember to double-check your measurements, allow for compaction (equals higher yield per CY), allow for a waste factor and always round up.     How to Calculate Your Square Footage? Driveway Coverage EXAMPLE 1 Standard Driveway to be covered with Stone 6" Deep   20' x 30' = 600 Square Feet 600' x .50 (6" Depth) = 300 Cubic Feet 300 / 27 = 11.11 Cubic Yards (round up to12 yards) Driveway or Pad Coverage EXAMPLE 2 L-Shaped Driveway or Pad to be covered with Stone, 7" Deep   This would be done in two sections. 20' x 35' = 700 Square Feet 10' x 32' = 320 Square Feet 320' + 700' = 1,020 Square Feet 1,020 x .58 (7" Depth) = 591.60 Cubic Feet 591.60 / 27 = 21.91 Cubic Yards (round up to 22) Calculating Circles EXAMPLE 1 Length Around a Circle, 16' Round Swimming Pool   16' x 3.1416 = 50.26'  To add 2.5' of stone around this pool 3' deep: 56.55' x 2.5' = 125.65' 125.65' x .25 (3" depth) = 31.41 Cubic Feet 31.41 / 27 = 1.163 Cubic Yards Calculating Circles EXAMPLE 2 Square Footage Inside a Circle, 24' Round Swimming Pool   24' x 24' = 576' 576' x .7854 = 452.39 Sq Ft (total inside pool) To add 4" of sand evenly across pool: 452.39' x .33 (4" depth) = 149.29 Cubic Feet 149.29 / 27 = 5.53 Cubic Yards     SGL Materials Inc © 2023