Desperdício materiais
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Líquido × (1+desperdício)
About this calculator
The material wastage calculator is an essential tool for construction professionals and property owners. It helps estimate the amount of material needed, considering the inevitable losses during the construction process. This is crucial to avoid excessive or insufficient purchases of materials, reducing costs and minimizing waste.
The formula used is simple: the net quantity of material needed, multiplied by a factor that considers the wastage percentage. For example, if the expected wastage is 5%, the formula will be: net quantity × (1 + 0.05). This ensures that the final quantity of material purchased is sufficient to cover losses during application.
It is important to use this calculator in construction projects that involve materials such as concrete, masonry, and paint, as each of them has a characteristic wastage rate. Concrete, for example, usually has a wastage of around 5%, while masonry can reach 10% and paint, 15%. Considering these values can make a big difference in the budget and efficiency of the work.
When using the material wastage calculator, it is essential to keep in mind care such as the accuracy of initial measurements and the experience of the applicator, factors that directly influence the wastage rate. In addition, it is always recommended to add a safety margin to cover any unforeseen events.
Frequently asked questions
Which materials can I calculate with this tool?
You can calculate wastage for various construction materials, such as concrete, masonry, paint, and others, considering their respective wastage rates.
How do I determine the wastage rate for a material?
The wastage rate can vary according to the material and the experience of the applicator. Common values are 5% for concrete, 10% for masonry, and 15% for paint.
Why is it important to calculate material wastage?
Calculating wastage helps avoid excessive or insufficient purchases of materials, reducing costs and minimizing waste during construction.
Does the calculator consider the worker's skill?
Not directly, but the wastage rate entered can reflect the applicator's skill. More experienced workers tend to generate less waste.
Can I use the calculator for any type of construction project?
Yes, the calculator can be used for various types of construction projects, as long as the wastage rates are adjusted according to the specific characteristics of each project.