Do not forget to include half a meter extra for waste Concrete Calculator Slabs, Square Footings, or Walls length footinchyardmetercentimeter width footinchyardmetercentimeter thickness or height footinchyardmetercentimeter quantity Hole, Column, or Round Footings diameter footinchyardmetercentimeter depth or height footinchyardmetercentimeter quantity Circular Slab or Tube outer diameter footinchyardmetercentimeter inner diameter footinchyardmetercentimeter length or height footinchyardmetercentimeter quantity powered by calculator.net