Chicken
Two pounds of edible chicken meat represents approximately:
What this means
The public unit is two pounds of edible chicken meat; the formal functional unit and boundary still control the measurement. The source literature may report chicken as live weight, carcass weight, edible weight, or retail product, so the unit matters. For the related continuous animal product, see eggs.
Formal measurement basis
| Item measured | Chicken meat |
|---|---|
| Formal functional unit | 1 kg edible chicken meat |
| Reader-facing unit | 2 pounds of edible chicken meat |
| Primary boundary | Cradle-to-retail where available |
| Secondary boundary | Cradle-to-farm-gate or live-weight production where source requires it |
| Source review | Version 2 source review, 2026 |
Full measurement table
| Physical quantity | Working value | Literature range | Unit | Boundary note |
|---|---|---|---|---|
| GHG emissions | 8.5 | 2.6–20 | kg CO₂e / kg edible weight | Cradle-to-retail chicken meat, GWP100 basis where source supports it |
| GHG emissions, 2-lb reader unit | ~17.0 | ~5.2–40.0 | lb CO₂e / 2 lb edible chicken | Converted from edible-weight values |
| Feed input | ~3.5 | Range pending hardening | kg feed / kg edible chicken | Derived from commercial broiler feed conversion on live-weight basis, converted to edible weight |
| Feed input, 2-lb reader unit | ~7.0 | Range pending hardening | lb feed / 2 lb edible chicken | Reader-facing conversion |
| Water consumption | ~590 | Range pending broader hardening | L / kg edible chicken | Cradle-to-farm-gate freshwater consumption; includes feed irrigation. Converted from ~300 L / kg live weight (Beal et al. 2023 baseline) using an approximately 0.51 edible-to-live ratio |
| Water consumption, 2-lb reader unit | ~140 | Range pending broader hardening | gallons / 2 lb edible chicken | Reader-facing conversion |
| Land occupation | ~5.5 | Range pending broader hardening | m²·year / kg edible chicken | Dominated by feed cropland. Converted from 2.83 m²·year / kg live weight (Beal et al. 2023 baseline) |
| Land occupation, 2-lb reader unit | ~5.0 | Range pending broader hardening | m²·year / 2 lb edible chicken | Reader-facing conversion |
What is included
The working GHG value uses a cradle-to-retail edible-weight boundary. Feed input is included as an item-specific production input because it is central to chicken production. It is not treated as a framework-level category across all items.
The water and land working values use a narrower cradle-to-farm-gate boundary from a U.S. broiler LCA: feed production and on-farm operations are included, but processing, distribution, and retail are not. The two boundaries are individually defensible under their stated system boundaries.
What is excluded
- Cooking
- Household food waste
- Dietary advice
- Comparisons to beef, pork, or plant proteins
- Dollar conversion of environmental effects
- Claims that mix live-weight and edible-weight values without conversion
Why values vary
Chicken values vary by feed composition, production system, region, electricity source, feed conversion, mortality, processing boundary, and whether the functional unit is live weight, carcass weight, edible weight, or retail weight.
Source notes
The GHG working value uses the midpoint of a typical cradle-to-retail edible-weight range reported by WWF/Moberg. The feed-input value is plausible on an edible-weight basis but still needs a hardened range. The water and land working values are derived from Beal et al. (2023), a peer-reviewed U.S. broiler LCA in Poultry Science that reports a 2020 baseline case of 0.30 m³ (~300 L) freshwater consumption and 2.83 m²·year land occupation per kg live weight, under a cradle-to-farm-gate boundary. Values are converted to a per-kg-edible-chicken basis using an approximately 0.51 edible-to-live ratio, consistent with the feed-input conversion used elsewhere on this page. Literature ranges for water and land remain to be hardened.
Sources
- World Wildlife Fund / Moberg, Measuring and Mitigating GHGs: Chicken. Used for: cradle-to-retail GHG working value, GHG range, edible-weight basis, and feed-conversion explanation.
- Resilience Services / National Chicken Council, Broiler Production System Life Cycle Assessment: 2020 Update. Used for: U.S. broiler LCA categories, including land use, global warming, water consumption, fossil resource scarcity, and particulate matter formation.
- FAO, Greenhouse Gas Emissions from Pig and Chicken Supply Chains: A Global Life Cycle Assessment. Used for: poultry supply-chain methodology and global context.
- Beal et al., Economic and environmental assessment of U.S. broiler production: opportunities to improve sustainability, Poultry Science, 2023. Used for: cradle-to-farm-gate baseline freshwater consumption (0.30 m³ / kg live weight) and land occupation (2.83 m²·year / kg live weight) working values for U.S. broiler production.