Pegada hídrica
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Carne 15000, Grãos 1500, Veg 500 L/kg
About this calculator
The water footprint calculator estimates the amount of water required to produce common foods like meat, grains, and vegetables. It uses average water consumption values per kilogram of product, such as 15,000 liters for meat, 1,500 liters for grains, and 500 liters for vegetables. This data helps raise awareness about the water impacts of food choices.
The calculator works with simplified formulas that multiply the consumed food amount by its respective water footprint. For instance, 200g of meat (0.2 kg × 15,000 L/kg) results in 3,000 liters. This visual comparison highlights differences in water use between food categories.
Use this tool when planning meals, comparing supermarket options, or teaching sustainability. Key precautions: values are global averages and may vary by region, production method, and seasonality. It is not a substitute for technical studies.
The water footprint includes green (rain), blue (surface), and gray (pollution) water. For comprehensive analysis, consult UN reports or specialized organizations. This calculator serves as an introductory tool to encourage conscious food choices daily.
Frequently asked questions
Why does meat have such a high water footprint?
Meat requires more water due to animal rearing processes, forage irrigation, and inefficient conversion of feed into animal protein. Animals also consume large amounts of water directly.
How does the calculator handle composite foods, like ready-made dishes?
For composite dishes, add the water footprints of individual ingredients separately, considering their proportions in the recipe.
Are these values updated based on new research?
The data is based on consolidated UN and scientific institution studies, but revisit the tool periodically to check for updates.
Can I use the calculator for imported products?
Yes, but note that imported foods may have different water footprints due to production methods and local climate conditions.