Calculating Blocks

Calculating the number of blocks 

 

Standard, UK, metric blocks are roughly 450 x 215 x 100mm (some are thicker but this will not effect the number of blocks required per square metre of wall), the mortar joints used are normally about 10mm both horizontally and vertically.
A single block wall requires 10 blocks per square metre.
So the total number of blocks for the wall is:
wall height (metres) x wall length (metres) x 10 = number of blocks