Meat Footprint Calculator — CO₂e Emissions from Meat Consumption
Enter how many kilograms of each meat type you eat per week to estimate your annual greenhouse gas footprint from meat — with a donut chart showing which meats dominate your emissions, compared to driving an equivalent number of car kilometres.
kg/week
kg/week
kg/week
kg/week
kg/week
Equivalent to driving 9,997 km in an average car
38.5
kg CO₂e/wkBeef
78%
Pork
5.9%
Chicken
9%
Fish (farmed)
7.1%
- 1
Weekly CO₂e (kg): Σ meat × emission factor
0.5×60 + 0×24 + 0.3×7.6 + 0.5×6.9 + 0.2×13.6 = 38.45Emission factors (kg CO₂e per kg of meat) from Poore & Nemecek (2018). - 2
Annual footprint (kg CO₂e)
38.45 × 52 = 1,999.4
How does this calculator work?
Annual meat CO₂e footprint = weekly kg of each meat × its emission factor (Poore & Nemecek 2018 medians: beef 60, lamb 24, fish farmed 13.6, pork 7.6, chicken 6.9 kg CO₂e/kg) × 52. Beef dominates most Western diets' food emissions — halving weekly beef from 500 g to 250 g saves roughly 1 560 kg CO₂e per year, equivalent to ~7 800 km of car driving.
Formula
How this is calculated
The carbon footprint of food is measured in kilograms of CO₂ equivalent (CO₂e) — a single number that combines CO₂, methane, nitrous oxide, and other greenhouse gases weighted by their global warming potential over 100 years. Meat is particularly emissions-intensive because ruminant animals (cattle, sheep) produce methane through enteric fermentation, and because the land area required to grow animal feed generates additional land-use-change emissions.
This calculator multiplies your weekly consumption of each meat type (in kg) by its median life-cycle emission factor (kg CO₂e per kg of retail food), then sums the contributions and annualises by multiplying by 52. The emission factors are median values from Poore & Nemecek (2018, Science), covering 38 700 farms across 119 countries — the most comprehensive food-LCA study to date. Beef from a dedicated beef herd has by far the highest median (60 kg CO₂e/kg), more than twice that of lamb (24) and roughly nine times that of chicken (6.9). Individual farms can range from less than half to several times the median.
For context, the car-kilometre equivalent uses an estimate of 200 g CO₂e per km, representing the lifecycle footprint (combustion + upstream fuel production) of an average petrol passenger car. Real-world values vary: efficient hybrids emit ~100 g/km; large SUVs ~250 g/km. These factors are reasonable order-of-magnitude estimates — use them to understand relative impacts rather than for precise carbon accounting.
Frequently asked questions
Beef cattle — especially from dedicated beef herds — emit methane via enteric fermentation (digestion), require large areas of land, and are inefficient converters of feed to edible protein. Chickens have shorter lifespans, produce negligible methane, and convert feed more efficiently. The median emission factor for beef (60 kg CO₂e/kg) is roughly 9× that of chicken (6.9 kg CO₂e/kg).
The figures are global median values from Poore & Nemecek (2018). They mask wide variability: the best-practice beef producers emit as little as 10–15 kg CO₂e/kg while the worst can exceed 100 kg CO₂e/kg. Grass-fed vs grain-fed, region, farm management, and land-use history all matter significantly. Use these estimates for relative comparisons between meat types, not precise carbon accounting.
Shifting from beef to chicken or plant-based proteins is typically 5–10× more impactful than choosing local over imported food. Reducing beef by even one day per week makes a larger dent than eliminating all air freight (which carries only ~0.5% of food by weight). Dairy is also significant, though lower than beef.
Also known as
TG we-Calculate Editorial Team. (2026). Meat Footprint Calculator — CO₂e Emissions from Meat Consumption [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/meat-footprint-calculator
TG we-Calculate Editorial Team. "Meat Footprint Calculator — CO₂e Emissions from Meat Consumption." TG we-Calculate. 2026. https://we-calculate.com/calculator/meat-footprint-calculator.
TG we-Calculate Editorial Team, "Meat Footprint Calculator — CO₂e Emissions from Meat Consumption," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/meat-footprint-calculator
@misc{wecalculate_meat_footprint_calculator, title = {Meat Footprint Calculator — CO₂e Emissions from Meat Consumption}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/meat-footprint-calculator}}, year = {2026}, note = {TG we-Calculate} }
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