Welcome to the Klein Grid

The Klein Sexual Orientation Grid (or KSOG) is a system for describing a person's sexual orientation in a way that is more detailed and informative than previous methods. It was introduced by Dr. Fritz Klein (1932-2006) in the first edition of his 1978 book The Bisexual Option.

It captures more nuance and complexity than the familiar, one-dimensional Kinsey Scale. Please note that the Klein Grid is not a diagnostic tool intended to test and reveal a person's sexual orientation. Instead, it is a learning tool to help people better understand the nuance and complexity that make up everyone's sexuality.