Does anyone know the approximate weight of a 9X9 and a 6X9 concrete blocks?

Thanks in advance.

The weight varies largely depending on the mix ratio of the constituents and the compaction effects.
For general building purposes, knowing the weights adds little or no value. For purely academic purposes however, it may be useful.

need it for a specific purpose.

OK. I'll try and check (at home) one I did some years ago for a school project. I bet you'll never get the same outside.

ok. thanks