are these concrete blocks and allowing for mortar. 12.5 per square metre, 62.5 per cubic metre with mortar
It depends on the orientation of the blocks.
For blocks that are 450mm x 225mm , you will need 9.88 blocks per square metre.
I understand such blocks come in different sizes.
20
20.66 blocks per m2 when laid flat (block size 100 x 440 x 215)
It depends on the orientation of the blocks.
The answer will depend on the size of the blocks.
Six and one-half blocks.
12.5 per square meter
12
For blocks that are 450mm x 225mm , you will need 9.88 blocks per square metre.
Approx 14
A standard block is 440mm x 215mm x 100mm you will require 10 blocks per square metre.
I understand such blocks come in different sizes.
20
20.66 blocks per m2 when laid flat (block size 100 x 440 x 215)
The answer will depend on the orientation of the blocks. It will be between 13 and 25.