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Car CO2 Emissions Calculator

Calculate your car's CO2 emissions based on consumption, fuel type, and annual km driven.

Sources: EPA -- Greenhouse Gas Emissions from a Typical Car · EEA -- CO2 emissions from cars

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How the Car CO2 Emissions Calculator Works

This calculator estimates the carbon dioxide (CO2) emissions produced by your car, based on actual fuel consumption, fuel type, and annual kilometers driven. The emission factors come from the ISPRA (Italian Institute for Environmental Protection and Research).

The Formula

  1. Annual consumption = (Consumption l/100km / 100) x Annual km
  2. Annual emissions = Annual consumption (liters) x Emission factor (kg CO2/l)
  3. Emissions per km = Annual emissions / Annual km x 1000 (to get g/km)

Emission Factors by Fuel Type

Each fuel has a different carbon content and therefore produces a different amount of CO2 per unit burned:

  • Gasoline: 2.31 kg CO2/liter
  • Diesel: 2.68 kg CO2/liter -- more CO2 per liter, but consumes less per km
  • LPG: 1.51 kg CO2/liter -- the cleanest among liquid fossil fuels
  • CNG (natural gas): 1.88 kg CO2/cubic meter -- low emissions per km

How to Reduce Emissions

The main strategies are: eco-driving, maintaining the vehicle well, reducing km driven by using public transit or cycling when possible, and carpooling. Long-term, switching to an electric or plug-in hybrid vehicle is the most effective choice.

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Frequently Asked Questions

How much CO2 does a liter of gasoline produce?▼
Burning one liter of gasoline produces about 2.31 kg of CO2. For diesel the factor is higher (2.68 kg/l), but diesel has lower per-km consumption. LPG produces less CO2 per liter (1.51 kg/l), while CNG emits about 1.88 kg/cubic meter.
How much CO2 does an average car produce per year?▼
A gasoline car driving 15,000 km/year with a consumption of 7 l/100km produces about 2,400 kg (2.4 tonnes) of CO2 per year. The European average for new cars is about 120 g CO2/km per WLTP data.
Are electric cars truly zero emissions?▼
Electric cars have zero tailpipe emissions (tank-to-wheel). However, considering the full lifecycle (battery production, electricity generation), emissions depend on the national energy mix. In most countries, an electric car produces 50-70% less CO2 than a comparable gasoline car.