Concrete Slabs  Volume Estimates
Estimate required concrete volume per sq. ft.
Required concrete is in general calculated in cubic yards (cy).
v = 0.0031 l w t (1)
where
v = required concrete  (cy, cu. yards)
l = slab length (ft)
w = slab width (ft)
t = slab depth (in)
 1 cubic yard = 27 cubic feet
 1 ft = 12 in
Slab Concrete Volume
Depth (in)  Volume (cy/sq.ft.) 

2  0.006 
4  0.012 
6  0.019 
8  0.024 
10  0.031 
 1 in (inch) = 25.4 mm = 2.54 cm = 0.0254 m
 1 yd^{3} = 0.7646 m^{3}
 1 ft^{2} = 0.0929 m^{2}
Area Covered by Concrete
The table below shows the area (sq.ft.) that 1 cu. yard of concrete will cover for various depths.
Depth (in)  Area (sq.ft.) 

2  162 
3  108 
4  81 
5  65 
6  54 
7  46.3 
8  40.5 
9  36 
10  32.4 
11  29.5 
12  27 
Concrete required for concrete slabs can be estimated below:
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American Concrete Institute. 
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