Meat footprint and tree benefits calculators sit on opposite sides of the same question — what a diet emits and what trees sequester — but both are explicit that they only scale scenario values you supply. The meat footprint calculator multiplies food mass by an entered lifecycle factor to estimate emissions. The tree benefits calculator multiplies tree count by entered per-tree-year model outputs. Neither infers an offset for the other, and neither supplies a generic coefficient: any connection between the two numbers happens outside the calculators.
What each calculator does
The meat footprint calculator takes servings, kg per serving, and a kg CO₂e-per-kg lifecycle factor that you enter with provenance. Food mass = servings × kg per serving; the lifecycle-emissions scenario = food mass × the entered factor. The page explicitly states that no water, land, car, or tree equivalent is inferred, and that the factor’s food, dataset version, geography, and system boundary must be recorded before the result is compared with anything. Its worked example: ten 0.1 kg servings total 1.00 kg, and an entered factor of 27 kg CO₂e/kg gives 27.0 kg CO₂e.
The tree benefits calculator takes tree count and entered per-tree-year model outputs, then scales: each scenario value = tree count × the entered per-tree-year output. Values should come from a named, location-calibrated i-Tree or equivalent model, with model, version, location, species, and calibration recorded. The page supplies no generic oxygen, monetary, carbon, or energy coefficient. Its worked example: 3 trees with entered outputs of 20 kg per tree-year and 2 cubic meters per tree-year give 60.0 kg per year and 6.0 cubic meters per year.
Side-by-side
| Meat footprint calculator | Tree benefits calculator | |
|---|---|---|
| Inputs | Servings, kg per serving, lifecycle factor in kg CO₂e/kg, provenance | Tree count and per-tree-year model outputs |
| Primary output | Lifecycle emissions scenario in kg CO₂e | Scaled annual benefits across multiple trees |
| Formula basis | Food mass × entered lifecycle factor | Tree count × entered per-tree-year output |
| Built-in factors | None — factor is user-entered and documented | None — outputs come from a named i-Tree or equivalent model |
| Offset inference | Explicitly none (no tree equivalent) | No generic carbon coefficient supplied |
| Typical uses | Diet-side emission scenarios | Urban-tree ecosystem-service scenarios |
When to use which
Use the meat footprint calculator when your question is about the emissions of a diet scenario: how many servings of a food, at an entered lifecycle factor, produce how much CO₂e. The page treats ranges as sensitivity ranges, not confidence intervals, and points to food miles for the transport leg and composting impact for food waste.
Use the tree benefits calculator when your question is about the tree side: scaling per-tree-year outputs from a named model across a tree count for annual benefit totals. The comparison between the two is legitimate only when both sides carry documented provenance — a lifecycle factor with food, version, geography, and boundary, and per-tree values with model, version, location, species, and calibration.
Limits and disclaimer
Both pages are educational only and are not certifications, offsets, or compliance filings. The meat footprint calculator’s result is only as good as the entered factor, and its own FAQ says no tree equivalent is inferred. The tree benefits calculator supplies no generic carbon coefficient, so a per-tree sequestration figure must come from a named model. Treat any offset arithmetic assembled from the two outputs as a directional estimate, not an official inventory.