Food footprint
This food carbon calculator measures the CO2e of what you eat using two official government-backed databases: Agribalyse (ADEME/INRAE, France) and The Big Climate Database (CONCITO, Denmark). Beef has one of the highest footprints per kilogram of any food, while lentils and other pulses are among the lowest — the calculator makes those differences visible line by line.
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Running total: 0.00 tCO2e
Your typical weekly shop
Kilograms of what you actually buy — skip anything you don't. Factors are per kg of food.
Beef
Kilograms bought in a typical week
Chicken
Kilograms bought in a typical week
Cheese
Kilograms bought in a typical week
Salmon
Kilograms bought in a typical week
Milk
Kilograms bought in a typical week
Bread
Kilograms bought in a typical week
Tomatoes
Kilograms bought in a typical week
Lentils
Kilograms bought in a typical week
How is it calculated?
- Itemised foods: per-kg factors from Agribalyse 3.1 or The Big Climate Database 1.2, source-labelled per line.
- Diet patterns: per-day factors from Scarborough et al. 2014 (Climatic Change), for days not covered by your itemised shop.
Every calculation runs server-side against a versioned official factor set and records the factor behind each line — see our methodology.
Frequently asked questions
- Why do food footprints vary so much between databases?
- Databases differ in system boundaries (farm gate vs retail vs plate) and national supply chains. We label every line with its database so you can see exactly which source produced each figure.
- Which foods have the highest carbon footprint?
- Ruminant meat leads by a long way: beef and lamb are typically tens of kgCO2e per kg. Cheese and farmed fish sit in the middle; plant staples like bread, tomatoes and lentils are usually below 2 kgCO2e per kg.