Depends on how big the bricks are.
Assuming a brick is 4" x 8", if you lay out your bricks, 3 wide and 3 long, you'll get an area 12 inches x 24 inches. So every 9 brick, you'll cover 2 square feet. This gives the basic calculation of 4.5 bricks per square foot. A 12' x 12' room is 144 square feet. 144 x 4.5 = 648 bricks needed
1350 of them will cover the floor.
no .of bricks = area of room /area of bricks area of room = 9 X12 X12 X12 inches ( 1 foot =12 inches ) area of bricks =3 X8 no.0f bricks =9 X12 X12 X12 inches /3 X 8 =648
9
168
10x12 room
You will need 233 30x30cm tiles to cover the room.
12...
The standard size brick is (8"L x 2 1/4"Th x 3 3/4" W). If you use a standard 3/8" joint between each brick, it would take roughly 6.67 brick per square foot, or 667 bricks.
123 will cover it. Get extras.
You multiply 10 by 12 and get the answer 120.