Cubic Yard Calculations
Calculating Cubic Yards for Square / Rectangular Areas:
Length x Depth x Width (all expressed in feet) = cubic feet divided by 27 = cubic yards.
NOTE: 1 cubic yard = 27 cubic feet (3'x3'x3').
Calculating Cubic Yards for Circular Areas:
Radius squared x 3.14 (Pi) x depth (all expressed in feet) = cubic feet divided by 27 = cubic yards.
NOTE: 1 cubic yard = 27 cubic feet (3'x3'x3')
Example: A 50-foot diameter circular area, 4 inches deep. NOTE: The radius is 1/2 of the diameter, so the calculation should be: 25' x 25' x 3.14 x .33 = 648 cubic feet divided by 27 = 24 cubic yards.
LINKS TO CALCULATORS ONLINE:
Materials Calculator (Mulch,Compost, Soil, Sand): http://homestakelandscape.com/calculator.html
Volume (Rectangular or Circular Area) Cubic Yard & Tonnage: http://www.con-strux.com/calculate.html
Stone/Base Rock Calculator: http://www.weldonmaterials.com/index.php?option=com_content&view=article&id=98:materials-caclulator&catid=43 NOTE: Choose STONE Tab.
The Dirt Source Calculators for Cubic Yards:
http://thedirtsource.com/Calculators/tabid/54/Default.aspx
CONVERTING INCHES TO FRACTIONS OF FEET:
1" 2" 3" 4" 5" 6" 7" 8" 9" 10" 11" 12"
.08 .16 .25 .33 .42 .50 .58 .67 .75 .83 .92 1.0