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# General Formulas

## How to Calculate Cubic Yards using feet and inches

Measure
⦁ Measure your area in feet
⦁ Determine the depth of your material, say top dressing, that you will put on this area generally using depth in inches
Convert all your measurements to feet
⦁ If you measured in feet and inches, divide the inches by 12 and add that to your feet measurement to get total feet
⦁ If you measured in inches only, divide by 12 and that is your measurement in feet
Calculate
⦁ Calculate your area (see below)
⦁ Calculate your volume: Multiply area times the depth, this will be volume in cubic feet
⦁ Calculate you cubic yards: Divide cubic feet by 27 to convert to cubic yards and this is your answer
⦁ Where (ft2) = square foot, (ft3) = cubic foot, (yd3) = cubic yard
Cubic Yard Formulas and Images for Different Areas

## Square Area ### Calculate cubic yards using depth in a square area

Using measurements in feet:
Area (ft2) = 2 x Side Length
Volume (ft3) = Depth x Area
Volume in Cubic Yards (yd3) = Volume (ft3) / 27

## Rectangle Area ### Calculate cubic yards using depth in a rectangle area

Using measurements in feet:
Area (ft2) = Length X Width
Volume (ft3) = Depth x Area
Volume in Cubic Yards (yd3) = Volume (ft3) / 27

## Rectangle Border Area ### Calculate cubic yards using depth in a rectangle border area

Inner Area (ft2) = Length x Width
Total Area (ft2) = (Length + (2xBorder Width)) x (Width + (Border Width))
Area (ft2) = Total Area – Inner Area
Volume (ft3) = Depth X Area
Volume in Cubic Yards (yd3) = Volume (ft3) / 27

## Circle Area ### Calculate cubic yards using depth in circle area

Inner Area (ft2) = Length x Width
Total Area (ft2) = (Length + (2xBorder Width)) x (Width + (Border Width))
Area (ft2) = Total Area – Inner Area
Volume (ft3) = Depth X Area
Volume in Cubic Yards (yd3) = Volume (ft3) / 27

## Triangle Area ### Calculate cubic yards using depth in a triangle area

Using measurements in feet:
Area (ft2) = (1/4) x square root [ (a+b+c) x (b+c-a) x (c+a+b) x (a+b-c) ]
Volume (ft3) = Depth x Area
Volume in Cubic Yards (yd3) = Volume (ft3) / 7
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