The Travel CO2 Calculator aims to promote climate-friendly travelling modes in Lithuania. It is a web-based tool, integrated into a popular Lithuanian route planner at www.maps.lt/CO2. Whenever a site-visitor is planning a trip, the calculator provides information on travel carbon footprint for the most popular transport modes and highlights sustainable options. Passenger transport is responsible for a significant share of CO2 emissions, which, however, can be highly reduced through our individual choices.