What is the weight of a standard concrete masonry block?

The dry weight of a medium density concrete block (215 x 450 x 100mm thick) is approximately 7.5Kg

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There are many different sizes, shapes and mixes used to make concrete block.

Additionally the weight varies if the unit is wet or not since they absorb water.

I see varying weights of 35 to 55 pounds for 8x8x16 block.