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converting cylinder to cubic ft and then to cubic yards

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  • converting cylinder to cubic ft and then to cubic yards

    need to find how much concrete to mix for anchor holes
    the hole diameter is 24" the depth is 5'
    so 24/12=2
    so to figure cubic ft would be 3.14*2*5=31.4
    then to cubic yards 31.4/3=10.466
    is this correct?

  • #2
    Re: converting cylinder to cubic ft and then to cubic yards

    Originally posted by Unregistered View Post
    need to find how much concrete to mix for anchor holes
    the hole diameter is 24" the depth is 5'
    so 24/12=2
    so to figure cubic ft would be 3.14*2*5=31.4
    then to cubic yards 31.4/3=10.466
    is this correct?
    No the diameter is 2' as you noted, but the volume is
    V = (pi/4)*D*H = 0.785*4*5 = 15.71 ft

    1 yd = 3 ft, but
    1 yd = 3 ft = 27 ft, so 0.6 yd

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