Everyday action · tip no. 1
Carbon footprint calculator: where to start to reduce your carbon footprint
In France, the average carbon footprint is between 8 and 9 tonnes of CO₂ equivalent per person per year. Calculating yours in ten minutes shows you which actions really count for you.
Your carbon footprint is the total amount of greenhouse gases emitted to produce and run everything you consume in a year: your travel, your home, your food, your purchases, and also your share of public services. In France, it averages between 8 and 9 tonnes of CO₂ equivalent per person, according to the latest estimates from the French Ministry for the Ecological Transition (SDES) and the national statistics institute (Insee). Calculating it is the best starting point: people often discover that what weighs most is not what they imagined.
Why it is useful
There is a lot of climate advice around, and not all of it carries the same weight. Unplugging a charger, switching off the lights or sorting your waste are good habits, but their effect on a footprint of several tonnes is modest. A long-haul flight, the way you heat your home or how much red meat you eat can, on their own, account for a large share of the total.
Calculating your footprint therefore lets you:
- prioritise: find your two or three heaviest items and focus your efforts on them;
- set a realistic goal that you can measure from one year to the next;
- avoid needless guilt: many people worry about minor actions when their main lever lies elsewhere.
Understanding the figures
What is CO₂ equivalent?
Carbon dioxide (CO₂) is not the only greenhouse gas. Methane, emitted in particular by ruminant livestock, and nitrous oxide, linked to fertilisers, also warm the atmosphere, each with a different intensity. To add everything up, each gas is converted into "CO₂ equivalent" (CO₂e): the amount of CO₂ that would have the same effect on the climate over a given period, usually one hundred years.
Footprint or territorial emissions?
There are two ways to count a country's emissions:
- Territorial emissions: what is emitted on French soil (factories, cars, heating, farming, etc.). They were about 6 tonnes per person in 2023.
- The carbon footprint: what is emitted, in France or abroad, to meet the consumption of people living in France. It includes, for example, the manufacture in Asia of a phone bought in France. It is significantly higher, because a large share of goods is imported.
The footprint is what best reflects the effect of our consumption choices.
Where do our tonnes go?
According to studies published by the SDES and organisations such as Citepa, the three largest items in the average French footprint are:
- Transport, around a quarter to a third of the total depending on the method, led by cars and planes;
- Food, about a fifth, dominated by meat and dairy products;
- Housing, also about a fifth, mainly because of heating.
Next come purchases of goods (clothes, electronic devices, furniture) and services, including a so-called "collective" share (schools, hospitals, roads, administration) that everyone shares and that we mainly influence as citizens.
What target should we aim for?
To meet the Paris Agreement, which aims to limit warming to well below 2 °C, global emissions must reach net zero around the middle of the century. French calculators, such as ADEME's, often use a benchmark of about 2 tonnes per person per year by 2050. You do not have to get there alone and right away: part of the reduction will come from collective changes (low-carbon energy, transport, industry). But individual choices can, according to studies, reduce the footprint by a significant share.
How to do it, step by step
1. Spend ten minutes with a carbon footprint calculator
The simplest option in France is Nos Gestes Climat, the free calculator from ADEME, the French agency for ecological transition. It requires no sign-up and no personal data. It asks about:
- your daily travel (car, public transport, bike);
- your flights and train journeys during the year;
- your home (floor area, heating, number of occupants);
- your diet (number of meals with meat, dairy products);
- your purchases (clothes, devices, furniture).
If you do not know an exact answer, an estimate is enough: the goal is the order of magnitude. Similar calculators exist in many countries.
2. Identify your two main items
At the end, the calculator shows your footprint broken down into broad categories. Note the two largest. They deserve your attention more than everything else put together.
Some common profiles:
- You fly several times a year: this item alone can exceed all the others. See our tip Take the train instead of flying.
- You live in a house heated with oil or gas: heating is probably your main lever. See Heat your home to 19 °C.
- You eat red meat almost every day: food weighs heavily. See Eat less red meat.
- You make all your journeys by car, even short ones: see Short trips on foot or by bike.
3. Choose one or two changes, not ten
The changes that last are the ones you choose yourself and can keep up. One strong action adopted for good is better than ten resolutions abandoned after a month. ADEME's calculator also suggests actions ranked by the effect they would have on your own profile.
4. Redo the calculation in a year
Keep a record of your result (a screenshot is enough) and redo the calculation the following year. Seeing your footprint fall is motivating, and helps you adjust your efforts.
Misconceptions to avoid
- "My small actions are pointless." Taken in isolation, an action may seem tiny. But the consumption choices of millions of people shape what companies offer and make public policies easier to implement.
- "It all comes down to governments and companies." Both are true at once: a large part of the reduction depends on collective decisions, and another part depends on our individual choices. One does not exclude the other.
- "Sorting waste is what matters most." Sorting is useful, especially for resources, but its effect on the carbon footprint is modest compared with transport, heating or food.
In short
- The average carbon footprint in France is between 8 and 9 tonnes of CO₂ equivalent per year.
- Transport, food and housing account for the largest share.
- A ten-minute calculation is enough to identify your two main items.
- Focus on one or two significant changes, and measure your progress from one year to the next.