Calculadora de Pegada de Carne
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
CO₂e/ano = kg/semana × 52 × fator_emissão (bovina=27, suína=12, frango=6,9, peixe=6)
About this calculator
This calculator estimates your annual carbon footprint from meat consumption, based on the amount and type of meat consumed per week. The meat footprint represents greenhouse gas emissions (CO₂ equivalent) associated with production, transport, and processing of different meats. Beef has the highest impact, while chicken and fish emit less. The calculation multiplies weekly consumption by 52 weeks and the emission factor for each meat type.
It is useful for anyone wanting to understand the environmental impact of their diet and identify reduction opportunities. For example, replacing beef with chicken or fish can significantly lower emissions. It can also be used in school projects, sustainability discussions, or to compare different dietary scenarios.
Important: emission factors are general averages and may vary depending on meat origin (local vs. imported, production system, etc.). Additionally, the calculator only considers meat consumption, not other foods or habits (like waste or transport). Results are estimates for awareness, not for official certifications.
Frequently asked questions
How does the calculator determine the emission factor for each meat?
Factors are based on averages from scientific studies, considering the full life cycle: breeding, feed, processing, and transport. Beef has 27 kg CO₂e/kg, pork 12, chicken 6.9, and fish 6 kg CO₂e/kg.
Is the result accurate for any type of beef?
No. The factor is an average; grass-fed beef may have different emissions from feedlot beef. The calculator provides a general estimate, not precise comparisons between production systems.
Can I use the calculator to plan a low-carbon diet?
Yes. It shows the impact of different meats, helping choose lower-footprint options. Combined with plant-based proteins, it can further reduce emissions.
Why does fish have a similar emission factor to chicken?
Farmed and wild-caught fish have varying emissions, but on average the factor is close to chicken's. Specific species may differ, but the calculator uses a general value.
Does the calculator account for meat waste?
No. It assumes all purchased meat is consumed. If there is waste, the actual footprint is lower because some emissions do not result in consumption.