Ecological footprint: what it is and how it differs from the carbon footprint

The ecological footprint is an indicator that measures how much biologically productive land and sea area a population needs to produce everything it consumes and to absorb the waste it generates, especially CO2. It is expressed in global hectares (gha), a standardised unit with world-average productivity, which makes it possible to compare the consumption of a person, a company or a country with the planet's capacity to regenerate.

Unlike the carbon footprint, which measures only greenhouse gas emissions, the ecological footprint is broader: it integrates the demand for cropland, grazing land, forests, fishing grounds, built-up land and the forest area needed to absorb emissions. The carbon footprint is, in fact, one of its components.

What the ecological footprint is and how it is calculated

The ecological footprint was developed in the 1990s by Mathis Wackernagel and William Rees, and it is now maintained and published by the Global Footprint Network. The underlying idea is accounting-based: on one side you estimate the demand for nature (the ecological footprint) and, on the other, the biocapacity, that is, the productive area actually available to regenerate resources and absorb waste.

The calculation aggregates consumption across several land categories:

• Cropland for plant-based food, fibres and other agricultural products.
• Grazing land for livestock production.
• Fishing grounds for marine and freshwater products.
• Forests for timber and other forest products.
• Built-up land occupied by infrastructure.
• Carbon uptake forest land, needed to absorb CO2 emissions from fossil fuels.

When a territory's ecological footprint exceeds its biocapacity, there is an ecological deficit: more is consumed than nature can replenish, drawing down accumulated natural capital. If the opposite happens, there is an ecological reserve.

Earth Overshoot Day

The best-known indicator derived from this calculation is Earth Overshoot Day: the date on which humanity has used up all the ecological resources the planet can regenerate in a year. It is calculated by dividing global biocapacity by humanity's ecological footprint and multiplying by the number of days in the year.

According to the Global Footprint Network, in 2026 that date fell on 30 July. From that day on, in ecological terms, consumption for the rest of the year is on credit. Put another way, humanity is using nature around 73% faster than ecosystems can regenerate it, which is equivalent to needing about 1.7 planets to sustain the current level of consumption.

Differences from the carbon and water footprints

Although they are sometimes used interchangeably, the ecological, carbon and water footprints measure different things and are expressed in different units.

The carbon footprint is the one most used by companies because it connects directly with climate regulation and reduction targets. You can see how it is calculated step by step in our guide on what the carbon footprint is and how it is calculated. The water footprint, in turn, has become critical in water-intensive sectors. The ecological footprint is the most aggregated of the three and works mainly as a communication and awareness framework rather than as an operational management metric.

What the ecological footprint is useful for in a company

The ecological footprint is a powerful tool to communicate an organisation's global impact in an intuitive language, but it is not very practical for day-to-day management because it aggregates very different impacts into a single figure. To make decisions, most companies work with more specific metrics.

When each indicator is appropriate

• Carbon footprint: when the aim is to comply with climate regulation, set reduction targets or respond to clients and investors.
• Water footprint: in activities with high water consumption or exposed to water stress.
• Ecological footprint: to give a global, didactic view of impact in sustainability reports or awareness campaigns.

The usual approach is to start by measuring the carbon footprint, which regulation requires, and to add other indicators depending on the activity and the company's environmental exposure.

How to reduce the ecological footprint

Reducing the ecological footprint means acting on its main components, starting with the largest one: the forest area linked to CO2 emissions. Since carbon is the biggest share of the ecological footprint in most developed economies, many of the levers overlap with those for reducing emissions.

Some lines of action with real impact are:

• Energy: improving energy efficiency and switching to renewable electricity directly reduces the carbon part of the footprint.
• Mobility and logistics: optimising routes, electrifying fleets and favouring lower-impact transport modes.
• Material consumption: applying circular economy criteria, extending product lifespans and cutting waste reduces the demand for cropland, forests and land.
• Food and supply chain: in organisations with agri-food activity, the origin of raw materials strongly influences the footprint linked to cropland and grazing land.

The logic is the same as in any environmental strategy: first measure to know where the impact is, then prioritise the most effective actions and, finally, track progress over time with comparable data.

Frequently asked questions

Is the carbon footprint part of the ecological footprint?

Yes. The forest area needed to absorb CO2 emissions from fossil fuels is one of the components of the ecological footprint and, in many countries, the largest one. That is why reducing the carbon footprint directly helps reduce the ecological one.

How do the ecological footprint and biocapacity differ?

The ecological footprint measures the demand for nature, while biocapacity measures the supply, that is, the productive area actually available. When demand exceeds supply, an ecological deficit occurs.

Can a company calculate its ecological footprint?

It can be estimated, but it requires converting very diverse consumption into global hectares, which introduces uncertainty. For management and reporting, it is more operational to measure the carbon footprint and, where applicable, the water footprint.

Start by measuring what regulation requires of you

Before communicating your global impact, it is worth having the basics well measured: your emissions. Manglai helps companies calculate their carbon footprint with real data, comply with regulation and build a solid reduction plan on which to base the rest of their environmental indicators.