Meanings
nounQ3 (plural Q3s)
plural Q3s
- The third quarter of a calendar year (July, August and September)
- The third quarter of a financial year.
- mathematicsThe third quartile.
A common way of expressing quartiles is as an interquartile range. The interquartile range describes the difference between the third quartile (Q3) and the first quartile (Q1), telling us about the range of the middle half of the scores in the distribution.
2026 February 1 (last accessed), “Measures of Spread”, in Laerd Statistics, archived from the original on 05 Feb 2024
Cite this entry
APA
Q3. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/Q3
MLA
“Q3.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Q3. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “Q3,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/Q3.
Source: Q3 on Wiktionary, CC BY-SA 4.0.