Concrete Columns
Estimate concrete volume required for concrete columns.
Concrete is in general calculated in cubic yards (cy).
The concrete required for a column can be calculated as
v = 0.7854 a^{2} h / 27 (1)
where
v = required concrete  cy (cu. yards)
a = column area (sq. ft.)
h = column height (ft)
 1 cubic yard = 27 cubic feet
 1 ft = 12 in
Concrete required per 1 ft Column Height
Column Size (in)  Volume (cy  cubic yards  per linear foot Round Column) 

8  0.013 
9  0.016 
10  0.020 
11  0.024 
12  0.029 
14  0.040 
16  0.051 
18  0.065 
20  0.081 
22  0.097 
24  0.116 
26  0.137 
28  0.158 
30  0.181 
Column Size (in x in)  Volume (cy  cubic yards  per linear foot Square Column) 

12 x 12  0.037 
13 x 13  0.043 
14 x 14  0.050 
15 x 15  0.058 
16 x 16  0.066 
17 x 17  0.074 
18 x 18  0.083 
19 x 19  0.093 
20 x 20  0.103 
21 x 21  0.113 
22 x 22  0.124 
23 x 23  0.136 
24 x 24  0.148 
25 x 25  0.161 
26 x 26  0.174 
27 x 27  0.188 
28 x 28  0.202 
29 x 29  0.216 
30 x 30  0.231 
 1 cu yd per linear foot (y^{3}/ft) = 2.5 m^{3}/m
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