It depends on the size of the bricks.
It depends on the one brick size
If you are using the red brick which are 4" x 8" you will need 4.5 bricks per square foot (just call it five.) 5 x 400 is 2000 bricks.
A 12 x 12 inch brick is 1 square foot. A 20 x 20 (foot) patio is 400 square feet, so you would need 400 bricks.. this assumes you are butting the bricks fairly tight, not leaving large seperations between them, etc...
9" thick wall needs 12 bricks per square foor 13.5" thick wall needs 18 bricks per square foot. 18" thick wall needs 24 bricks per square foot Sender: Mr. Khayal Ahmed Memon Sub Engineer in USAID N.G.O
It depends on the size of the bricks.
It depends on the one brick size
There are different sizes of brick. You will need to know how many bricks are in a square foot, including the mortar joint.
If you are using the red brick which are 4" x 8" you will need 4.5 bricks per square foot (just call it five.) 5 x 400 is 2000 bricks.
A 12 x 12 inch brick is 1 square foot. A 20 x 20 (foot) patio is 400 square feet, so you would need 400 bricks.. this assumes you are butting the bricks fairly tight, not leaving large seperations between them, etc...
9" thick wall needs 12 bricks per square foor 13.5" thick wall needs 18 bricks per square foot. 18" thick wall needs 24 bricks per square foot Sender: Mr. Khayal Ahmed Memon Sub Engineer in USAID N.G.O
3 cement bricks for foot
There are exactly 6.75 bricks per square foot. Standard modular brick courses 3 bricks per 8" vertically, and 8" per brick horizontally. Therefore, 1 square foot is 1.5 bricks wide x 4.5 bricks high, or 6.75 bricks per square foot. Keep in mind, there are MANY different brick sizes, but this calculation holds true for standard 'modular' brick.
144
Depends on the size of the red brick
That's (4+3+4+3) * 12 = 14 * 12 = 168 square feet of wall. At a standard of 6.86 bricks per square foot that would come to a little under 1200 bricks, but it definitely depends on the exact size of your old bricks.
6 inches is half a foot so it takes four 6 by 6 inch bricks to make one square foot. 348 x 4 = 1392. So you'll need 1392 bricks.