# 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 only skip to “Calculate”

⦁ 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