AAC Block Calculator: Estimate block quantity based on square meters

How many lightweight concrete blocks are needed per square meter? Calculate it easily yourself. Wondering how many lightweight concrete blocks are needed per square meter? The answer is 8.33 blocks (standard size). See how to calculate the area in detail, a size comparison table, and a formula for allowing for cutting and trimming, all here.

Are you calculating how many lightweight concrete blocks are needed per square meter, or do you have a wall area but are unsure how many blocks or pallets you need, and how much mortar and plaster you will require?

For standard-sized lightweight concrete blocks (20 x 60 cm), approximately 8.33 blocks are needed per square meter of wall area, before allowing for cutting or on-site damage. Generally, a buffer of 5-10% should be used depending on the project.

AY Contento has developed an online lightweight concrete block calculator to help calculate everything from net wall area, the number of blocks, the number of pallets, mortar, plaster, to estimating the number of truckloads (6-wheel trucks and trailers). This makes it easier for homeowners, contractors, and purchasing departments to estimate materials before ordering.

What calculations does the program provide?

Calculation programWhat is it used for?
Net wall areaCombine the areas of multiple walls and omit doors/windows.
Number of lightweight bricksCalculated from area × 8.33 blocks/sq.m.
In case of lossChoose no option, 5%, or 10%.
Number of palletsShowing both the full pallet and the remaining quantity.
Full pallet order quantityPlease check the quantity needed to order a full pallet.
MortarCalculated based on brick area and thickness.
PlasterSelect the number of sides and the thickness of the plaster.
TransportationEstimate the number of trips required from large 6-wheel trucks and 3-axle trailers.
AY CONTENTO CONSTRUCTION TOOL

Lightweight concrete block calculation program + ordering plan.

Calculate the net area, the number of bricks, mortar, plaster, pallets, and the number of truckloads needed in one trip. This helps you plan before ordering to ensure you don't run out of supplies on site.

Calculate the opening. Allow for extra 0–10% Assess 6-wheel trucks/trailers. Copy the summary and send it to the sales department.
1

wall area

If you know the total area, you can enter square meters, or let the program calculate it from the width × height of each wall.

sq.m.

Are there any openings such as doors or windows?

Total wall area 0.00 sq.m.
Cut open the opening. 0.00 sq.m.
Net construction area 0.00 sq.m.
2

Select the thickness of the lightweight brick.

Standard brick dimensions are 20 x 60 cm. An average of 8.33 bricks are used per square meter.

8.33Block / sq.m.
200Block / Pallet
24sq.m. / pallet
33sq.m. / 1 bag of cement
3

Usage details

Specify the number of wall layers, allow for scraps and plastering work, to get a result that is closer to the actual order.

Wall construction
To build a two-layer wall, double the amount of bricks and mortar needed.
Allowance for cutting/breaking/loss.
How many sides need to be plastered?
The system calculates based on a rate of 1 bag = 5.6 sq.m. at a thickness of 5 mm.
Used only in sales summary messages; not sent to GA4/Data Layer.

The calculations are estimates for ordering purposes. Actual quantities may vary depending on on-site cutting, installation method, joint thickness, surface condition, and transportation limitations.

Note: The results are preliminary estimates to assist in planning materials and ordering. Actual quantities may vary depending on the brand, work method, site conditions, loading, and shipping terms. Please check with the manufacturer or sales department before placing a final order.

How many lightweight concrete blocks are needed per square meter?

A standard-sized lightweight concrete block has a construction surface area of approximately... 20 × 60 cm. Therefore, the area of one brick is 1,200 square centimeters, while the area of one square meter is 10,000 square centimeters.

10,000 ÷ 1,200 = 8.33 pieces

Therefore, the answer is... Approximately 8.33 lightweight concrete blocks are needed per square meter. Before adding any leftover scraps.

Regardless of whether you choose a thickness of 7.5, 10, 12.5, 15, 17.5, or 20 cm, if the masonry face remains 20 x 60 cm, the number of bricks per square meter will be the same because the thickness does not change the surface area of the brick.

For actual orders, we recommend allowing for a little extra. 5–10% For cutting, breaking, and loss during on-site work, general tasks can start with 5%, while tasks involving numerous angles or cuts may choose 10%.

DIY Lightweight Brick Calculation Formula

Once the wall area is known, you can... Calculate the number of lightweight bricks. It is initially derived from the formula:

Number of bricks = Net wall area × 8.33

When calculating the net wall area, you should first subtract the area of openings such as doors and windows.

Net wall area = Total wall area − Door/window area

To calculate the actual order quantity, add a percentage allowance for potential losses:

Recommended number of bricks = Net area × 8.33 × (1 + % allowance for loss)

Example: A single-layer wall of 100 sq.m. requires a buffer of 5%.

100 × 8.33 × 1.05 = 874.65

Therefore, you should prepare approximately [number] bricks. 875 pieces

DIY Lightweight Brick Calculation Formula

Once the wall area is known, you can... Calculate the number of lightweight bricks. It is initially derived from the formula:

Number of bricks = Net wall area × 8.33

When calculating the net wall area, you should first subtract the area of openings such as doors and windows.

Net wall area = Total wall area − Door/window area

To calculate the actual order quantity, add a percentage allowance for potential losses:

Recommended number of bricks = Net area × 8.33 × (1 + % allowance for loss)

Example: A single-layer wall of 100 sq.m. requires a buffer of 5%.

100 × 8.33 × 1.05 = 874.65

Therefore, you should prepare approximately [number] bricks. 875 pieces

How many lightweight concrete blocks are in one pallet?

How many lightweight concrete blocks are in one pallet? It will depend on the thickness of the bricks, as thicker bricks will fit fewer per pallet.

AY Contento's calculator uses the pallet quantity data in the table to help estimate the order quantity:

Lightweight brick sizeNumber of usersReference quantity/pallet
20 × 60 × 7.5 cm.8.33 blocks/sq.m.200 pieces
20 × 60 × 10 cm.8.33 blocks/sq.m.150 pieces
20 × 60 × 12.5 cm.8.33 blocks/sq.m.120 pieces
20 × 60 × 15 cm.8.33 blocks/sq.m.100 pieces
20 × 60 × 17.5 cm.8.33 blocks/sq.m.80 pieces
20 × 60 × 20 cm.8.33 blocks/sq.m.70 pieces

This pallet quantity information is consistent with data found in the market for various sizes, such as 7.5 cm (200 pieces), 10 cm (150 pieces), and 15 cm (100 pieces). However, the actual packing quantity should be double-checked according to the brand and model before ordering.

Example calculation for 100 square meters of lightweight concrete blocks.

Assuming there is a net wall area. 100 sq.m. Select 10 cm lightweight concrete blocks for a single layer, allowing for loss of 5%.

Actual area quantity
100 × 8.33 = 833 pieces

When accounting for loss of 5%, the program will calculate approximately.
875 pieces

The 10 cm bricks in the program's dataset are packaged 150 bricks per pallet, therefore equals...
5 pallets + 125 blocks

If you want to order a full pallet, it will be...
6 pallets = 900 blocks

The calculator also automatically calculates the amount of mortar, plaster, and the number of truck trips required.

How does the program calculate the amount of mortar and plaster needed?

In addition to calculating the number of bricks, the program also estimates... Lightweight brick mortar The amount of mortar needed per area depends on the thickness of the brick, as different brick thicknesses require a different amount of mortar per area.

For plastering, the program will be used. Net wall area × Number of plastered sides And adjust the quantity according to the selected thickness, such as 5, 10, or 15 mm.

For example, if a net wall area of 100 square meters is plastered on both sides, the total plastering area would be 200 square meters. Therefore, increasing the plaster thickness will proportionally increase the amount of plaster needed, not decrease it.

The actual amount of mortar needed may vary depending on the brand, joint thickness, mixing method, and builder's skill. Therefore, it's always best to check the information on the packaging of the product you intend to use. Different lightweight concrete block formulations on the market have varying mortar ratios.

Calculate the number of trips before placing your order.

Once the number of bricks is known, the program will estimate the number of trips needed. Large 6-wheel truck and 3-axle trailer Based on the selected brick size, this information helps in planning the initial delivery.

For example, if the number of bricks that can be transported in one trip by a large 6-wheel truck will be displayed immediately, along with a comparison to that of a trailer.

However, the number of trips shown is an estimate based on reference capacity. Actual delivery times must also take into account cargo weight, route, vehicle limitations, site access, and transportation conditions before confirmation.

Frequently Asked Questions (People Also Ask)

Approximately [number] lightweight concrete blocks with a standard 20 x 60 cm face size are needed. 8.33 blocks per square meter. Allow for scraps or breakage before making a decision.

Before allowing for losses, an estimate will be used. 84 pieces And if 5% is approximately... 88 pieces

According to the basic formula, use an approximation. 833 pieces Before allowing for losses, the 5% Calculator will suggest an approximation. 875 pieces

Typical work can be estimated. 5% For work involving many cuts, numerous angles, or risks during transportation, consider allowing for extra allowance. 10% can

Depending on the thickness, for example, in the Calculator dataset, 7.5 cm = 200 pieces/pallet, 10 cm = 150 pieces, and 15 cm = 100 pieces. Please verify the actual quantity according to the brand before ordering.

Remove the door and window areas from the total wall area before calculating the number of bricks, or use the mode... There is an opening. In the Calculator, the system will automatically deduct the area.

The calculator multiplies the amount of bricks and mortar based on the number of wall layers. Plaster is calculated separately for each side you choose to plaster, so you don't always need to double the amount.

For project clients or contractors who want Lightweight concrete blocks, Lightweight brick mortar, and Lightweight plaster For special prices for the project, you can contact us through the following channels:

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