Aerated Block

The aerated concrete block calculator (AAC / Ytong) estimates how many blocks and how much thin-bed mortar you need to build a wall. Enter the wall and block dimensions for an instant material list.

Common use cases

• Internal partition walls
• External insulated walls
• Renovation infill walls
• Lightweight load-bearing walls

How to use this calculator

1. Enter the wall length and height.
2. Enter the block length, depth and height.
3. Press Calculate to see the number of blocks needed.
4. Use the mortar quantities for thin-bed glue mortar.

Example calculation

A 10 m × 2.5 m wall (25 m²) built with 60 × 25 cm blocks needs about 167 blocks and roughly 50 kg of thin-bed mortar.

Frequently asked questions

How many aerated blocks per square metre?

About 6.7 blocks per m² for standard 60 × 25 cm blocks.

Do I use normal mortar with aerated blocks?

No — use a thin-bed glue mortar (around 2 kg per m² of wall) for full thermal performance.

Can aerated blocks be load-bearing?

Yes, higher-density AAC blocks can carry loads up to several floors; check the manufacturer's strength class.

How do I cut aerated blocks?

Use a hand saw, band saw or alligator saw — AAC blocks cut easily without power tools.