How are these values calculated?

The savings indicated show the difference between the journey by train compared to the journey by aeroplane. The CO2 emissions for the entire journey include direct operation, energy provision and infrastructure. The factors used in the calculation were compiled by treeze Ltd. and are based on the values provided by EcoPassenger and mobitool. The CO2 emissions of the rail transport are calculated on the basis of the number of kilometres travelled, with a distinction being made between energy consumption, energy sources and average utilisation, depending on the country. For the air journey, the emissions of the flight at average utilisation are taken into account, as are the journeys to and from the airport, which are assumed to be standard car journeys.

Ecocalculator comparison values.


Basis of calculation


X times less than for a flight from Zurich to Berlin.

For a flight from Zurich to Berlin, 217 kg of CO2 emissions are assumed.

fahrplan.sbb.chLink opens in new window.

This amount can be used to supply a 2-person household with electricity for X days.

150 kilograms of CO2 correspond to 1125 kilowatt hours and thus to the average annual energy consumption of a 2-room flat.

energieeffizienz.chLink opens in new window.

This would allow you to drive X kilometres by car.

The assumption used is that the car consumes 8.5 litres of petrol per 100 kilometres. A journey of 4900 kilometres with this type of car corresponds to around one tonne of CO2.

oekoservice.chLink opens in new window.

Enough to fill X balloons.

One litre of CO2 weighs 1.96 grams. This means that one kilogram of CO2 has a volume of 509 litres. We assume a volume of 2.5 litres per balloon. This means that one kilogram of CO2 can fill around 204 balloons.

handelsblatt.comLink opens in new window.

You will help to avoid CHF X of emissions-induced damage. 1 tonne of CO2 generates a damage level of around 900 US dollars. organicconsumers.orgLink opens in new window.

Further content

Replacements for Internet Explorer 11.

Microsoft is gradually discontinuing its support for Internet Explorer 11 (more info on microsoft.comLink opens in new window.). If you continue to use Internet Explorer to access, you may experience functional limitations and display problems in the future. For this reason, we recommend using a more modern browser (e.g. Mozilla FirefoxLink opens in new window.Google ChromeLink opens in new window.Microsoft EdgeLink opens in new window.).

We are aware that switching to a new browser may take some getting used to and cause some uncertainties. A more modern browser will allow you to benefit from faster and more secure internet access in future. We are committed to continuing our work with the utmost enthusiasm in the future to guarantee you accessible and inclusive access to