生态足迹计算器 — 公式

Ecological Footprint

Your ecological footprint is the total area of productive land and water needed to produce what you consume and absorb your waste, measured in global hectares (gha).

Formula

Total Footprint = Food + Housing + Transport + Goods (all in gha)

Earths Needed = Total Footprint / Biocapacity per person

The world has about 1.6 gha of biocapacity per person. The average American uses about 8 gha, meaning if everyone lived like an American, we would need 5 Earths.

计算示例

A person with moderate consumption across four categories.

  1. Total = 1.2 + 0.8 + 1.5 + 1.0 = 4.5 gha
  2. Earths needed = 4.5 / 1.6 = 2.8 Earths