Welcome to the International Student Carbon Footprint Challenge!
calculate your footprint



Before thinking about efficient ways to reduce our impact on the planet, we need to know exactly how much our different behaviors impact our carbon footprint.

Our International Student Footprint Calculator will allow you to do just that! The questionnaire is divided into four parts: transportation, home energy and appliances, food and personal purchases.

Answer the questions as honestly as possible and keep an eye on your amount of CO2 release per year at the bottom of the screen as you continue. You may be alarmed at times by the results!

We offer (and strongly suggest that you use) the ability to register at the site, so that your data will be automatically saved as you progress. That way you can complete the calculator questionnaire in more than one sitting, and return anytime to explore all of the features of the calculator and to update your footprint calculation based on lifestyle changes.

Once you start the questions, keep in mind that it can take 25-30 minutes or more for English-proficient students to complete them (50 minutes for those for whom English is a second language [ESL]).

We suggest that students fill out this Calculator Prep Worksheet in advance, it will make the online calculation faster and more accurate.

*You may wish to download our class assignment to reflect on what you discover as you use the calculator.
*You may also wish to download this pictorial key (updated September 2013) to the features of our calculator.

  [note: this key is also included as part of the online activity].

As of Feb 2012, we have all of the sources, equations and assumptions for the entire calculator gathered in a single document. You can download the calculator documentation here.

March 2013: German language version of the calculator now available!

NEW Sept 26, 2013: Updated version of calculator posted, now featuring auto-save for registered users.

NEW October 2013: We now have a pilot (non-Flash) version of the calculator for mobile devices (in English only) !

*Please note that this prototype currently lacks many of the features present in the Flash version - including ability to save data and skip back-and-forth among the questions. *Therefore, we suggest that you only use the mobile version if you have no other option, or unless you would just like to give it a try.
*Please send any feedback on the mobile version prototype to us at seastar (at) stanford.edu

When you are ready to start your footprint calculation, click the button below...