Let’s see how many blocks will build a 12 by 12 room, Calculate a 4×4 m room with 2.60 m high walls (8′ 6” ceiling height). You’ll need ( 37.45 sqm) , that is, 482 cinder blocks with 400x200x150 mm.
Do your own calculations…
How Many Blocks Are Needed to Make a 4×4 Room
Amount of Blocks to Make a 4×4 Room
| 12 by 12 Room h=8′ 6” | |
| Wall Area | Length |
| 8.71 sqm (94 sq ft) | 3.85m (12′ 6”) |
| 10.18 sqm (110 sq ft) | 3.85m (12′ 6”) |
| 8.39 sqm (91 sq ft) | 3.85m (12′ 6”) |
| 10.18 sqm (110 sq ft) | 3.85m (12′ 6”) |
| 37.45 sqm (405 sq ft) | 15.4m (50′ 6”) |
At the rate of 12.5 blocks with 40x20x15cm per square meter, that would be 482 units of CINDER BLOCKS with 400x200x150 mm (16”x8”x6”), including 3% waste.
How many Block does a 12 x 12 Room Take?
12×12 Room with 8′ 3” High Walls
The necessary quantity is 464 standard blocks with 400x200x150mm (includes 3% loss).
4×4 m Room with 2.40m High Walls
The necessary quantity is 444 blocks of 400x200x150 mm (3% loss is included).
Calculate How Many Blocks a Room of 4×4 meters needs
A 3% shrinkage is included.
How Much Material is Needed to Build a 4×4 Room
As extra information, summary tables are shown with the amounts of concrete needed to build the cyclopean foundations, the 4 columns and lintels.
| Columns | Qty . | Volume | Section | Long |
| M25 Concrete | 4 | 0.24 m³ | 150x150mm | 2650mm |
| Foundation | Section | Volume | Qty . | Area |
| Cyclopean 17.5MPa | Long Foundation 600x500mm | 2.43m³ | 4 | 5.4 sqm |
| Lintels | Section | Material | Long |
| 0.035m³ | 150x200mm | M25 concrete | 1150mm |
| 0.045m³ | 150x200mm | M25 concrete | 1500mm |
How many Bricks do I need to make a 4×4 Room
Knowing the amount of sqm of wall 37.45 sqm (403 sq ft), you can also calculate, how many bricks a 12 by 12 room will need.
For that, you can visit this page, and see HOW MANY BRICKS ARE NEEDED FOR a wall, depending on the brick size.
How many Bricks does a 4×4m (12’x12′) Room Take?
If it is about the construction of an isolated room, 4 walls are needed, at least.
In case of being an addition room, the construction of the room may require only 3 partitions walls.
Also, it may be the case that only 2 partitions or dividing walls are needed, as in this 450 SQUARE FEET house.
You can see all the information about HOW MUCH MATERIAL IS NEEDED TO BUILD A 12×12 ROOM.
You will find all the MATERIALS TO BUILD A ROOM.
For slabs, columns, stairs, foundations and other elements of a house, you can use this BUILDING MATERIALS CALCULATOR.