Bags of pre-mixed Concrete Mix needed per cubic metre.
There are about 2,200kg of Concrete Mix per cubic metre of concrete.
Therefore, to make up one cubic metre of concrete you would need about:
110 x 20kg Concrete Mix bags. 108 bags are quoted by Boral Australia, for 1 cubic metre (m³) of finished concrete.
The old fashioned way, using cement, sand and aggregate for paths and driveways, would be 1 part Cement, 2 parts sand and 3 parts aggregate.
Using this method, about 16 x 20kg Cement bags would be needed, according to Cement Australia
One Cubic Metre of Finished Concrete
16 bags 20kg bags of cement, 0.5 cubic metre of Sand and 0.8 cubic metre of aggregate.