The Circularity Check is a free, online self-evaluation tool for companies, in particular SMEs, that determines a circularity score for a specific product and/or service. In the form of a questionnaire, the tool comprises about 60 questions to check whether the product/service is circular and sustainable, and if so, to what extent. A score is assigned to each question; the higher the score the better.

The outcome of the check is a percentage that indicates how circular a company's product or service is. The tool also provides partial scores on design, procurement, manufacturing, delivery, use, recovery and sustainability.