AAC Block Calculator
A 10 m by 3 m wall of 600 × 200 mm AAC blocks with a 10 mm joint is 234.19 blocks, or 246 with 5 percent waste. That face is 7.81 blocks per square meter.
Last updated . Block face starts at 600 × 200 mm. Joint starts at 10 mm. Waste starts at 5 percent. Thickness is not part of the count.
Estimate how many AAC blocks a wall needs from length, height, block face, and joint. Meters and feet both work. Subtract door and window area before you order.
Clay bricks are on the brick calculator. Hollow concrete blocks are on the concrete block calculator. A percent-of-volume mortar takeoff is on the mortar calculator.
AAC blocks for a wall
AAC blocks = net area ÷ (face length + joint) ÷ (face height + joint). The order line adds the waste percent and rounds up. A running-bond half unit at the end of a course is why the waste line exists.
Results
How many AAC blocks do you need?
AAC blocks are counted on the face, not the thickness. Net area is length times height minus openings. Divide by the block length plus the joint, and by the block height plus the joint. The order line multiplies by the waste percent and rounds up.
Blocks = net area ÷ (length + joint) ÷ (height + joint). For 600 mm by 200 mm and a 10 mm joint the module is 0.610 m by 0.210 m, so one square meter needs 7.81 blocks. Thirty square meters need 234.19, and 5 percent waste orders 246.
Blocks per square meter
No waste. The 600 × 200 mm block is the row people mean by a standard AAC block in India.
| Face | Joint | Per m² | Per ft² | 10 × 3 m wall |
|---|---|---|---|---|
| 600 × 200 mm | none | 8.33 | 0.77 | 250.00 |
| 600 × 200 mm | 3 mm | 8.17 | 0.76 | 245.08 |
| 600 × 200 mm | 10 mm | 7.81 | 0.73 | 234.19 |
| 600 × 240 mm | 10 mm | 6.56 | 0.61 | 196.72 |
Per square foot is the per-square-meter figure times 0.09290304. The 10 mm row is what the tool shows when you open the page. The 600 × 240 mm row is 1 ÷ (0.610 × 0.250) = 6.56.
Worked example
Leave length at 10 m, height at 3 m, the size on 600 × 200 mm, the joint at 10 mm, openings at 0, and waste at 5 percent. Blocks in the area read 234.19. The order reads 246. Per square meter reads 7.81 and per square foot reads 0.73. Net area reads 30.00 m².
Frequently asked questions
How many AAC blocks do I need?
Divide the net wall area by the block face plus the joint. A 10 m by 3 m wall of 600 × 200 mm blocks with a 10 mm joint is 234.19 blocks. Five percent extra for cuts and breakage makes the order 246. The same wall with no openings is 30.00 m².
How many AAC blocks in 1 square meter?
A 600 × 200 mm face with no joint is 8.33 blocks per square meter. Add a 10 mm joint and the module is 610 × 210 mm, which is 7.81 per square meter, or 0.73 per square foot. A 3 mm thin joint is 8.17 per square meter.
How many AAC blocks for a 10 by 3 meter wall?
That is the default on this page: 234.19 blocks at a 10 mm joint, and 246 once 5 percent is added. Change the joint to 3 mm and the wall count becomes 245.08, with an order of 258 at the same 5 percent. Thickness does not change the face count.
What size is a standard AAC block?
The common face in India is 600 mm long by 200 mm high. Thickness is a separate choice, often 100, 150, 200, or 230 mm, and it does not change how many blocks cover the wall. A 600 × 240 mm face and a 625 × 250 mm face are on the size menu.
Do I need mortar or thin-bed adhesive?
A 10 mm joint is ordinary cement mortar. A 3 mm joint is thin-bed adhesive, and the bag coverage is printed by the adhesive maker, so this page does not invent a kilogram rate. For a mortar percentage of wall volume, use the mortar calculator. Clay brick counts belong on the brick calculator.
How does an AAC count compare with clay bricks?
The same 10 m by 3 m single leaf is 1,500.00 modular clay bricks and 234.19 AAC blocks of 600 × 200 mm with a 10 mm joint. One AAC block covers about 6.4 of those brick faces. The brick page also returns cement bags. This page returns the block count.
Should I add waste to an AAC order?
Yes. Cuts at openings and a broken block or two are normal. Five percent on 234.19 blocks rounds up to 246. A wall with many windows needs more than 5 percent because each jamb is a cut. Type the opening area so those holes are not ordered as blocks.