In-depth
How the Carbon Footprint Calculator Works
This calculator estimates your annual personal carbon footprint, meaning how many tonnes of CO2 equivalent you produce through your daily activities: transportation, home energy, food, and purchases.
What Is a Carbon Footprint?
A carbon footprint is the measure of total greenhouse gas emissions caused directly and indirectly by a person, organization, or product. It is measured in tonnes of CO2 equivalent (tCO2e) per year.
The Situation in Italy
- Italian average: 7.5 tonnes CO2/year per person (source: Global Carbon Project)
- European average (EU): 6.2 tonnes CO2/year
- World average: 4.7 tonnes CO2/year
- Paris Agreement target 2050: 2.0 tonnes CO2/year per person
How Are Emissions Calculated?
Transportation (average: 30% of emissions)
Transportation is often the main source of individual emissions in Italy. Key factors:
- Petrol car: ~171 g CO2/km
- Diesel car: ~156 g CO2/km
- Hybrid car: ~95 g CO2/km
- Electric car: ~50 g CO2/km (with Italian electricity mix)
- Short-haul flight: ~250 kg CO2 per round trip
- Long-haul flight: ~1,100 kg CO2 per round trip
Home and Energy (average: 25% of emissions)
Domestic heating and electricity consumption contribute significantly:
- Italy electricity emission factor: 257 g CO2/kWh (2024 mix, ISPRA)
- Natural gas for heating: ~22 kg CO2/m2/year
- Heat pump: ~8 kg CO2/m2/year (more efficient)
Food (average: 25% of emissions)
Diet has a significant impact on your carbon footprint:
- Omnivore diet (meat every day): ~2,800 kg CO2/year
- Moderate omnivore diet: ~2,200 kg CO2/year
- Vegetarian diet: ~1,200 kg CO2/year
- Vegan diet: ~900 kg CO2/year
Shopping and Consumption (average: 20% of emissions)
Clothing, electronics, and consumer goods have a hidden footprint from manufacturing and transportation.
How to Reduce Your Carbon Footprint
| Action | Estimated Savings |
|---|---|
| Switch from car to bike/public transport (2 days/week) | up to 1.5 tonnes/year |
| Renewable energy for your home | up to 1 tonne/year |
| Reduce red meat to 1-2 times/week | up to 0.8 tonnes/year |
| Lower thermostat by 1 degree C | up to 0.3 tonnes/year |
| Avoid 1 short flight (take the train instead) | ~0.2 tonnes per flight |
| Second-hand purchases / repairs | 0.3-0.5 tonnes/year |
Carbon Footprint FAQ
Does the personal carbon footprint include everything?
No, this calculator estimates the main direct and indirect emissions. It does not include emissions from public services, infrastructure, healthcare, and other collective services that add approximately 1-2 tonnes per person.
How many trees are needed to offset my emissions?
A mature tree absorbs about 22 kg of CO2 per year. To offset the Italian average of 7.5 tonnes, you would need about 340 trees -- which is why reducing emissions is more effective than offsetting.
Are the data sources reliable?
The emission factors used come from ISPRA (Italian Institute for Environmental Protection and Research), EEA (European Environment Agency), and Global Carbon Project, updated to 2024.
