It depends on the orientation of the blocks.
For blocks that are 450mm x 225mm , you will need 9.88 blocks per square metre.
are these concrete blocks and allowing for mortar. 12.5 per square metre, 62.5 per cubic metre with mortar
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 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.
are these concrete blocks and allowing for mortar. 12.5 per square metre, 62.5 per cubic metre with mortar
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.