Methodology

Our carbon calculator is built to make climate awareness easy to understand. Behind every result is a simple idea — helping you see how your everyday travel choices affect the planet. By using verified data and smart calculations, the app turns your input into an estimate of your personal carbon footprint.

The goal is to make it easier for you to take small steps toward a greener lifestyle. Want to see the full details? Click the paper below to explore our complete methodology and data sources.

Paper
Carbon App


Our numbers and formulas

Public Transport

Mathematical expressions for public transport:

\[ \text{CO}_2 = \text{Distance} \times {\text{Emission factor}}\]

Private Transport

Mathematical expressions for private transport:

\[ \text{CO}_2 = \text{Distance} \times \frac{\text{Emission factor}}{\text{Passenger}}\]

Human Power

The most environmentally friendly forms of transport are the ones powered by human energy. We do not emit greenhouse gases when walking or cycling. In addition to being more environmentally friendly, these modes of transport also contribute to better health and less noise.

Walk/bike emission factor = 0 g/km

Private Transport

Car (diesel) emission factor: 229 g/km
Car (petrol) emission factor: 198 g/km
Car (electric) emission factor: 59 g/km
Motorcycle emission factor: 95 g/km

Public Transport

Bybane emission factor: 1,5 g/passenger-km

Bus (electric) emission factor: 13 g/passenger-km
Bus (diesel) emission factor: 30 g/passenger-km

Train (electric) emission factor: 7 g/passenger-km
Train (diesel) emission factor: 91 g/passenger-km

Airplane (economy) emission factor: 127 g/passenger-km
Airplane (business) emission factor: 284 g/passenger-km

Ferry (diesel) emission factor: 186 g/passenger-km
Ferry (electric) emission factor: 23 g/passenger-km

FootPrint