Large companies and institutional players are challenged to assess and calculate their carbon footprint. But they typically have the means to hire experts – in-house or consultants – and buy licenses of useful tools.This applies similarly to larger-sized SMEs. But what about distinctly small companies or indeed even individuals? How can they get a guesstimate on their carbon footprint, and possibly even some pointers how to do better going forward? Hence, here a short list of such calculators, both for individuals as well as for small companies.