The AAC Block Calculator is a smart and accurate online tool that helps you estimate the number of Autoclaved Aerated Concrete (AAC) blocks required for your wall construction. AAC blocks are lightweight, energy-efficient, and eco-friendly alternatives to red clay bricks widely used in modern buildings for their superior insulation and ease of installation.
With this calculator, you can instantly determine the total block count, wall area, and approximate mortar volume, helping you plan material costs and reduce wastage during construction.
Formula Used in AAC Block Calculation
To estimate the number of AAC blocks required, the calculator uses the following formula:
Number of Blocks = Wall Area ÷ Block Area (including mortar)
Where:
- Wall Area (m²) = Wall Length × Wall Height
- Block Area (m²) = (Block Length + Mortar Thickness) × (Block Height + Mortar Thickness)
The mortar volume is calculated by comparing the total wall volume and total block volume:
Mortar Volume = (Wall Area × Wall Thickness) − (Number of Blocks × Block Volume)
Example Calculation
Let’s say your wall dimensions are Length = 10 m, Height = 3 m, and you’re using AAC blocks of size 600 × 200 × 200 mm with 10 mm mortar thickness.
- Wall Area:
= 10 × 3 = 30 m² - Effective Block Size:
= (0.6 + 0.01) × (0.2 + 0.01) = 0.126 m² - Number of Blocks:
= 30 ÷ 0.126 = 238 blocks (approx.) - Mortar Volume (approx.):
= Total Wall Volume − Total Block Volume
This means you’ll need around 238 AAC blocks for your 10×3 m wall, along with the corresponding mortar.
How to Use the AAC Block Calculator
- Enter Wall Dimensions – Input the total wall length and height in meters.
- Enter Block Size – Provide the block’s length, height, and thickness in millimetres (default: 600×200×200 mm).
- Set Mortar Thickness – Usually 10 mm, but you can adjust as per your construction design.
- Click “Calculate” – The tool will automatically compute:
- Total AAC blocks required
- Wall area
- Effective block size (with mortar)
- Approximate mortar volume
- Click “Clear” to reset all fields for a new calculation.
