Dimensionamento Cisterna

consumo_mes·2.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

L cisterna
20.000

About this calculator

The Cistern Sizing Calculator helps determine the ideal size of a cistern for storing rainwater. It considers the monthly water consumption and multiplies it by 2, providing a reserve for emergency situations or drought periods. Proper cistern sizing is crucial to ensure the efficiency of the rainwater harvesting system.

The calculator works based on a simple formula: monthly water consumption multiplied by 2. This means that if the monthly water consumption is 100 liters, the cistern should have a capacity of at least 200 liters. This calculation is important to avoid water shortages during dry periods or when demand exceeds supply.

The use of the cistern sizing calculator is recommended for property owners who want to implement a rainwater harvesting system, farmers who need a water source for irrigation, and communities seeking alternatives for water supply. It is also a valuable tool for professionals in the field of engineering and architecture who design water resource management systems.

When using the calculator, it is essential to be careful with the accuracy of the input data, such as monthly water consumption. Additionally, it is crucial to consider factors such as the rainwater catchment area, filtration system efficiency, and actual water demand for the intended use.

Frequently asked questions

What is the purpose of the cistern sizing calculator?

The purpose is to determine the ideal size of the cistern for storing rainwater, considering monthly water consumption.

How does the calculator work?

The calculator multiplies the monthly water consumption by 2 to determine the minimum cistern capacity.

Who should use the calculator?

Property owners, farmers, communities, and engineering and architecture professionals seeking to implement rainwater harvesting systems.

What precautions should I take when using the calculator?

Accuracy of input data, such as monthly water consumption, and consideration of factors like catchment area and filtration system efficiency.

Does the calculator consider actual water demand?

No, the calculator provides an estimate based on monthly consumption. It is essential to consider the actual water demand for the intended use.

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