The term "SQ" can refer to spiritual intelligence, which is a term used by some philosophers, psychologists, and developmental theorists to indicate spiritual parallels with IQ and EQ. Ken ODonnell advocates the integration of spiritual intelligence (SQ) with both rational intelligence (IQ) and emotional intelligence (EQ). IQ helps us to interact with numbers, formulas, and things, EQ helps us to interact with people, and SQ helps us to maintain inner balance. To calculate ones level of SQ, he suggests considering how much time, money, energy, and thoughts are needed to obtain a desired result, as well as how much bilateral respect exists in our relationships.

In addition to spiritual intelligence, "SQ" can also refer to social quotient, which is the measure of ones ability to build a network of friends and maintain it over a long period of time. People with higher EQ and SQ tend to go further in life than those with high IQ but low EQ and SQ. Most schools focus on improving IQ levels while EQ and SQ are often overlooked. A person with high IQ can end up being employed by a person with high EQ and SQ, even though they have an average IQ. EQ represents ones character, while SQ represents ones charisma. It is important to develop habits that improve all three Qs, especially EQ and SQ.

Lastly, "sq" is also used as a written abbreviation for "square" when giving the measurement of an area.