Aerated Concrete Calculator
Calculate aerated concrete blocks for house: quantity, volume, adhesive consumption. Supports 600×300×200 and other sizes.
Total length of all load-bearing walls in meters
Wall height from floor to ceiling in meters
Masonry thickness in mm: 300, 375 or 400 for load-bearing walls
Total area of windows and doors in m²
Length of one AAC block in mm (standard 600)
Height of one AAC block in mm (200 or 250)
Block width in mm — equal to wall thickness
Calculation formula
Blocks = ⌈(Length × Height − Openings) × Thickness / V_block⌉
First we get net wall area (perimeter × height minus windows and doors), then multiply by thickness for masonry volume. Divide by single block volume and round up. Adhesive consumption is about 25 kg per 1 m³ of masonry.
About the aerated concrete calculator
The aerated concrete calculator helps you figure out how many AAC (autoclaved aerated concrete) blocks you need for a house, bathhouse, garage, or interior partitions. Enter the wall perimeter and height, masonry thickness, block size, and total openings area — and get block count, masonry volume, and adhesive consumption.
The calculator supports all common sizes: classic 600×300×200 for D500 load-bearing walls, 600×100×250 partition blocks, 625×250×400, and any custom size. Just type in the block length, height, and width — the result recalculates automatically.
All calculations run right in your browser: no data is sent to a server, no signup required. Plan the order in advance so you don't pay for extra pallets or waste a trip back to the supplier.
Calculator benefits
Openings deducted
Windows and doors are subtracted from wall area so you don't overpay for unused blocks.
Any block size
Set block dimensions manually — 600×300×200, 625×250×400, or any custom variant is supported.
Adhesive included
Besides block count we estimate thin-bed adhesive — roughly 25 kg per 1 m³ of masonry.
Frequently asked questions
What is the difference between D400, D500 and D600 gas-blocks?
The number is the density in kg/m³. D400 is warmer but less strong — fits one- and two-story homes and partitions. D500 is the universal choice for load-bearing walls. D600 is stronger but colder: used for heavily loaded walls and small basement structures.
What wall thickness should I choose: 300, 375 or 400 mm?
300 mm fits warm climates or walls with external insulation. 375 mm is the sweet spot for temperate climates without extra insulation when using D400. 400 mm is used in cold regions or where energy efficiency requirements are stricter.
Do AAC masonry rows need reinforcement?
Yes, reinforcement is mandatory: the first row, under window openings, every 4th row by height, and under the wall-plate. An 8 mm rebar in a chase filled with adhesive prevents shrinkage and thermal cracks.
Does an AAC wall need an exterior cladding?
Aerated concrete requires exterior finishing to protect it from moisture and UV. Suitable options are AAC-grade plaster, ventilated facade with siding or clinker, or face brick with a 30–40 mm vent gap. The facade can be added later — the masonry survives a winter without finishing.
Should I order AAC blocks with a reserve?
Yes, add 5–7% to the calculated quantity for breakage during unloading, cuts near openings, and corner blocks. For complex floor plans the reserve grows to about 10%.
How much adhesive is needed per cubic meter of AAC?
For thin-bed masonry the adhesive consumption is about 25 kg of dry mix per 1 m³ of wall at a 2–3 mm joint. That is 5–6 times less than with cement-sand mortar and reduces heat loss through the joints.