Ecology & Environment

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Vegan Footprint Scenario Calculator.

Compare a mixed diet with an all-plant scenario using entered food masses and lifecycle factors.

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Set your values

Results update as you type.

Results update automatically as you type.

How to Use

Scenario arithmetic only: every rate, lifecycle factor, and boundary is entered explicitly; no regional defaults or hidden datasets are used.

Use Cases

Estimate your personal dietary footprint

Input your typical weekly servings, portion size, and the fraction of animal-based foods to see how your current diet compares to an all-plant alternative over a chosen period.

Example: Enter 7 servings/week, 0.2 kg per serving, 52 weeks, 0.5 animal fraction, with factors 5 and 1 kg CO₂e/kg.

Plan a gradual shift to plant-based eating

Use the calculator to see the emissions impact of reducing the animal-food fraction in your diet, helping you set realistic goals for a more sustainable eating pattern.

Example: Compare scenarios with animal fractions of 0.5, 0.3, and 0.1 to see the emissions reduction.

Frequently Asked Questions

How does the Vegan Footprint Scenario Calculator work?
You enter your weekly servings, mass per serving, weeks in the period, current animal-food fraction, and the CO₂e factors for animal and plant foods. The calculator estimates emissions for your current mixed scenario and an all-plant scenario, showing the difference.
What do the CO₂e factors mean?
CO₂e (carbon dioxide equivalent) factors represent the lifecycle greenhouse gas emissions per kilogram of food. You provide the factors for animal-based and plant-based foods. The calculator uses them to estimate emissions based on the mass and servings you enter.
Can I use this calculator for any type of food?
Yes, as long as you know the approximate CO₂e factors for the animal and plant foods you want to compare. The calculator is generic and works with any food items, as long as you input consistent units (servings, kg, weeks).

Tips & Common Mistakes

Tips

  • Use consistent units: ensure servings per week, mass per serving (kg), and weeks in period are all in the same time frame (e.g., weekly servings over a year).
  • Research typical CO₂e factors for your specific foods, as values vary widely (e.g., beef vs. chicken, tofu vs. lentils).
  • The 'current animal-food fraction' should be between 0 and 1, representing the proportion of your total food mass that comes from animal products.
  • Use the results as a rough estimate to inform your choices, not as a precise scientific measurement.

Common Mistakes to Avoid

  • Entering the animal-food fraction as a percentage (e.g., 50 instead of 0.5) – always use a decimal between 0 and 1.
  • Mixing units, such as entering mass per serving in grams but factors in kg CO₂e/kg – keep everything in kilograms.
  • Forgetting to account for all weeks in the period – if you want a yearly estimate, enter 52 weeks, not 1.

Last updated: August 13, 2026