The Product Circularity Index (PCI) is a metric used to assess and measure the circularity or recyclability of a product. It quantifies the extent to which a product is designed and manufactured with principles of circular economy in mind, focusing on its ability to be reused, recycled, or recovered at the end of its life cycle. The PCI provides a numerical value or rating that indicates the level of circularity of a product, with higher values indicating greater circularity and lower environmental impact. It takes into account factors such as the use of recycled materials, design for disassembly, ease of recycling, and potential for extended product life through repair or refurbishment. The PCI helps guide product designers, manufacturers, and consumers towards more sustainable and circular product choices.