Construction Materials Calculator (Paint, Tile, Bricks)

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how many bricks per square meter of wall

How many bricks per square meter of wall

Open the Masonry tab, pick the block type and enter the wall area, or let the tool take the area from your rooms. The result gives the pieces with waste and the mortar materials for the chosen mix.

Where pieces per m² come from

Pieces per m² is geometry: 1 m² divided by the area each piece takes in the wall, joint included. For a block 19 cm long and 19 cm high with a 1 cm joint, each piece takes 20 x 20 cm, or 0.04 m², and 25 fit per m². The 39 cm long block takes 40 x 20 cm and gives 12.5 per m². Ceramic infill block catalogs list the same 25 and 12.5, and round the 29 cm one to 16.5, where the exact math gives 16.7.
The types change the result a lot. The 5 x 10 x 20 cm solid brick, laid flat in a half-brick wall, comes to about 79 pieces per m². The 9 x 14 x 19 cm six-hole ceramic brick, also laid flat, gives 33 per m². Sizes are nominal, per the Brazilian standards NBR 15270 (ceramic) and NBR 6136 (concrete), and the real piece can be up to about 1 cm smaller, which is why the joint is an editable field. On top of the total comes transport and cutting waste, 5% by default.
Laying mortar is the volume left between the pieces: (1 - pieces x face area) x wall thickness, plus 15% loss. For a 9 x 19 x 19 block that is 0.0088 m³ per m². From the volume comes the material through the cement:lime:sand volume mix; in a 1:2:8, SINAPI composition 87292 uses 196.6 kg of cement, 174.8 kg of lime and 1.165 m³ of sand per m³ of mortar. Cement and lime bags in the list are added up with the screed, plaster and concrete, so you can buy everything at once.

Checked examples

Ceramic block 9 x 19 x 19

Input: junta 1 cm
Expected output: 25 peças/m²

Each piece takes 20 x 20 cm in the wall.

Ceramic block 9 x 19 x 39

Input: junta 1 cm
Expected output: 12,5 peças/m²

Each piece takes 40 x 20 cm.

Solid brick 5 x 10 x 20, half-brick wall

Input: junta 1 cm
Expected output: 79,4 peças/m²

A 21 x 6 cm face with the joint.

10 m² of wall in 9 x 19 x 19 block

Input: 10 m², perda 5%
Expected output: 263 peças

250 pieces plus 5% make 262.5, rounded up.

10 m² in 6-hole brick 9 x 14 x 19

Input: 10 m², perda 5%
Expected output: 350 peças

33.3 pieces/m² x 10 x 1.05.

1:2:8 mortar for the 10 m² of 9 x 19 x 19 block

Input: 0,101 m³ de argamassa
Expected output: 19,8 kg de cimento, 17,6 kg de cal, 0,12 m³ de areia

One 50 kg cement bag and one 20 kg lime bag are enough.

Full tool FAQ

How many liters of paint do I need for a room?

Take the net wall area, multiply by the coats and divide by the coverage. A 4 x 3 m bedroom with a 2.7 m ceiling, one door (1.6 m²) and one window (2.0 m²) has 14 x 2.7 = 37.8 m² gross and 34.2 m² net. With 2 coats at 9.4 m²/L that is 7.3 L, and 8.0 L with a 10% margin. The best purchase at the example prices is two 3.6 L cans plus one 0.9 L can, or 8.1 L. The coverage printed on your own paint can always beats the default value.

Is paint coverage the same across brands?

How does the calculator choose the paint cans?

How many boxes of porcelain tile should I buy?

How much tile adhesive does each tile size use?

How is grout calculated?

How many bricks or blocks go into 1 m² of wall?

How do the cement bags and sand for laying mortar come out?

Can I use this for slabs, beams, columns and footings?

Is the project saved, and how do I share it?

Frequently asked questions

What is the difference between brick and block in the math?

The math is the same: it depends only on length, height and joint of the face. What changes is the result, because bigger pieces give fewer units per m². Thickness only enters the mortar volume.

Do I deduct doors and windows from masonry?

Yes, they are openings with no wall. With the Walls source the calculator already uses the net room area, at 1.6 m² per door and 2.0 m² per window. If the job has lintels and sills, allow a larger margin.

How much waste should I allow?

The default is 5%, which covers transport breakage and cuts. Jobs with many cutouts, fragile pieces or hand unloading may need more; the Waste field accepts any value from 0 to 100%.

Next steps

Where pieces per m² come from

Pieces per m² is geometry: 1 m² divided by the area each piece takes in the wall, joint included. For a block 19 cm long and 19 cm high with a 1 cm joint, each piece takes 20 x 20 cm, or 0.04 m², and 25 fit per m². The 39 cm long block takes 40 x 20 cm and gives 12.5 per m². Ceramic infill block catalogs list the same 25 and 12.5, and round the 29 cm one to 16.5, where the exact math gives 16.7.

The types change the result a lot. The 5 x 10 x 20 cm solid brick, laid flat in a half-brick wall, comes to about 79 pieces per m². The 9 x 14 x 19 cm six-hole ceramic brick, also laid flat, gives 33 per m². Sizes are nominal, per the Brazilian standards NBR 15270 (ceramic) and NBR 6136 (concrete), and the real piece can be up to about 1 cm smaller, which is why the joint is an editable field. On top of the total comes transport and cutting waste, 5% by default.

Laying mortar is the volume left between the pieces: (1 - pieces x face area) x wall thickness, plus 15% loss. For a 9 x 19 x 19 block that is 0.0088 m³ per m². From the volume comes the material through the cement:lime:sand volume mix; in a 1:2:8, SINAPI composition 87292 uses 196.6 kg of cement, 174.8 kg of lime and 1.165 m³ of sand per m³ of mortar. Cement and lime bags in the list are added up with the screed, plaster and concrete, so you can buy everything at once.

Checked examples

Ceramic block 9 x 19 x 19

Input: junta 1 cm
Expected output: 25 peças/m²

Each piece takes 20 x 20 cm in the wall.

Ceramic block 9 x 19 x 39

Input: junta 1 cm
Expected output: 12,5 peças/m²

Each piece takes 40 x 20 cm.

Solid brick 5 x 10 x 20, half-brick wall

Input: junta 1 cm
Expected output: 79,4 peças/m²

A 21 x 6 cm face with the joint.

10 m² of wall in 9 x 19 x 19 block

Input: 10 m², perda 5%
Expected output: 263 peças

250 pieces plus 5% make 262.5, rounded up.

10 m² in 6-hole brick 9 x 14 x 19

Input: 10 m², perda 5%
Expected output: 350 peças

33.3 pieces/m² x 10 x 1.05.

1:2:8 mortar for the 10 m² of 9 x 19 x 19 block

Input: 0,101 m³ de argamassa
Expected output: 19,8 kg de cimento, 17,6 kg de cal, 0,12 m³ de areia

One 50 kg cement bag and one 20 kg lime bag are enough.

Full tool FAQ

How many liters of paint do I need for a room?

Is paint coverage the same across brands?

How does the calculator choose the paint cans?

How many boxes of porcelain tile should I buy?

How much tile adhesive does each tile size use?

How is grout calculated?

How many bricks or blocks go into 1 m² of wall?

How do the cement bags and sand for laying mortar come out?

Can I use this for slabs, beams, columns and footings?

Is the project saved, and how do I share it?

Frequently asked questions

What is the difference between brick and block in the math?

The math is the same: it depends only on length, height and joint of the face. What changes is the result, because bigger pieces give fewer units per m². Thickness only enters the mortar volume.

Do I deduct doors and windows from masonry?

How much waste should I allow?

The default is 5%, which covers transport breakage and cuts. Jobs with many cutouts, fragile pieces or hand unloading may need more; the Waste field accepts any value from 0 to 100%.

Construction Materials Calculator (Paint, Tile, Bricks)

Continue in the tool

More pages for this tool

How many bricks per square meter of wall

Where pieces per m² come from

Checked examples

Ceramic block 9 x 19 x 19

Ceramic block 9 x 19 x 39

Solid brick 5 x 10 x 20, half-brick wall

10 m² of wall in 9 x 19 x 19 block

10 m² in 6-hole brick 9 x 14 x 19

1:2:8 mortar for the 10 m² of 9 x 19 x 19 block

Full tool FAQ

Frequently asked questions

What is the difference between brick and block in the math?

Do I deduct doors and windows from masonry?

How much waste should I allow?

Next steps

Construction Materials Calculator (Paint, Tile, Bricks)

Rooms in the project

Continue in the tool

More pages for this tool

How many bricks per square meter of wall

Where pieces per m² come from

Checked examples

Ceramic block 9 x 19 x 19

Ceramic block 9 x 19 x 39

Solid brick 5 x 10 x 20, half-brick wall

10 m² of wall in 9 x 19 x 19 block

10 m² in 6-hole brick 9 x 14 x 19

1:2:8 mortar for the 10 m² of 9 x 19 x 19 block

Full tool FAQ

Frequently asked questions

What is the difference between brick and block in the math?

Do I deduct doors and windows from masonry?

How much waste should I allow?

Next steps

Rooms in the project