Una ramani? Okay, fanya hivi.
Standard wise, square metre moja ya ukuta hujengwa kwa tofari 9 zikisimama, au 12 zikilazwa. (450*230*150mm block)
Chukua length*height of your wall, for all the walls of your house to get the total square metres of the walls. Then deduct the total square metres of openings. ie windows and doors.
Then multiply the remaining square metres of walls by the number of blocks per square metre, to get the total number of blocks for your house.
If that doesnt help, mtafute Qs.