Calculadora de Bloco de Concreto
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
blocos = ceil(área / 0,0741 × 1,05); bloco padrão 39×19 cm = 0,0741 m²
About this calculator
The Concrete Block Calculator estimates the number of standard concrete blocks (39×19×14 cm) needed to build a wall. Simply enter the width and height of the wall in meters, and the tool calculates the total area and the number of blocks, considering a 5% waste for cuts and breakage. The calculation is based on the area of each block (0.0741 m²) and includes a safety factor.
To use the calculator, measure the width and height of the wall in meters, enter the values in the corresponding fields, and click 'Calculate'. The result shows the number of whole blocks needed, rounded up. This tool is useful for construction professionals, engineers, architects, and anyone planning a project, such as building walls, house walls, or sheds.
It is important to note that the calculator considers standard concrete blocks of 39 cm length by 19 cm height. If the block has different dimensions, the result may not be accurate. Additionally, the 5% waste is an estimate; in projects with many cuts or complexity, you may need to increase this margin. Always purchase an extra amount of blocks to avoid shortages during execution.
The calculator does not consider the thickness of mortar joints, which is typically 1 to 1.5 cm. For a more accurate calculation, especially on large areas, it is recommended to include joints in the sizing. Consult an engineer or qualified professional for detailed projects.
Frequently asked questions
How do I measure the wall area to use the calculator?
Measure the width and height of the wall in meters using a tape measure. Multiply the values to get the total area. Enter these numbers in the calculator fields.
Does the calculator consider mortar joints?
No. The calculator does not include joint thickness. For a more accurate calculation, add 1 to 1.5 cm per joint or consult a professional.
Can I use the calculator for blocks of other dimensions?
No. The calculator is designed for standard 39x19 cm blocks. For other sizes, adjust the formula manually or use a specific calculator.
What does the 5% waste included in the calculation mean?
The 5% waste is an extra margin to cover broken or cut blocks during construction. In projects with many cuts, increase this margin to 10%.
How many blocks are on a pallet?
Typically, a pallet of standard concrete blocks contains between 100 and 150 units, depending on the manufacturer. Check with your local supplier.