Mix Design Calculation Chart Boral
Volume Cubic Metre* (m3) No of bags 3 5 7 9 11 Estimating how many 20kg bags of premix concrete to order (rounded up to the nearest full bag) * 108 x 20kg bags of Boral Cement Concrete Mix will fill 1 cubic metre (m3). Depth of hole (mm) Cubic metres(m3) needed. Hole diameter (mm) 300mm 400mm 500mm 600mm 700mm