Concrete

ONE CUBIC YARD OF CONCRETE WILL PLACE :

Thick"

Decimal

Sq. Ft.

1"

.083

324

1½"

.012

216

2"

.166

162

2½"

.208

130

3"

.25

108

3½" .208

93

4"

.333

81

4½" .375

72

5"

.416

65
5½"

.458

59

6"

.5

54

6½" .541 50

Thick"

Decimal

Sq. Ft.

7"

.583 46
7½" .625

43

8"

.667

40.5

8½" .708

38

9"

.75

36

9½" .708

34.5

10"

.833

32

10½" .875 31

11"

.916

29.5

12½" .958 28

12"

1

27

12½" 1.042 26

TO FIND THE AREA IN SQUARE FEET & VOLUME IN CUBIC FEET

Area of a rectangle or square Length x Width
Area of a right triangle Length x With divided by 2
Area of a circle Radius squared x 3.1416
Volume Area x Height

CONCRETE

A cubic foot = 1728 cubic inches.  A cubic foot  weights approx. 150 lb. 
A cubic yard = 27 cubic feet. A cubic yard  weights approx. 4050 lb.

TO CALCULATE CONCRETE

length in feet x width in feet x height in feet = cubic feet. Then dived by 27 to get number of yards required

Note: to convert inches to a dismal divide the number of inches by 12 ( or use chart above )