About the Generation Calculator
This generation calculator answers “what generation am I?” from a single birth year. It tells you whether you are a Baby Boomer, Gen X, Millennial, Gen Z, Gen Alpha or one of the older or newer cohorts, shows the birth-year range of that generation, and lists how old every generation is in the year you choose.
It is handy for marketers building audience personas, HR teams planning multigenerational workplaces, teachers and students discussing social history, and anyone settling a family debate about who counts as a Millennial. If you were born near a boundary it also flags the popular “micro-generation” cusps such as Xennials and Zillennials.
Generations are social conventions, not official statistics, so different sources draw the lines a year or two apart. We use the Pew Research Center boundaries for the Silent Generation through Gen Z (Millennials 1981–1996, Gen Z 1997–2012), 2013–2024 for Gen Alpha (continuing on from Pew’s Gen Z end year; demographer Mark McCrindle, who coined the term, starts it in 2010) and 2025–2039 for Gen Beta.
How to use the generation calculator
- 1Enter your birth year (or anyone’s you are curious about).
- 2Optionally change the year used to show ages.
- 3Read your generation and its birth-year range.
- 4Check the cusp field if you were born near a boundary.
- 5Use the table to compare the age span of every generation.
Formula and method
The calculator looks up your birth year in a table of generational ranges and returns the matching cohort. It also reports where you sit inside that range — early, mid or late wave — by dividing the generation’s span into thirds, because people born at the edges often identify with the neighbouring generation.
Ages are the age reached during the chosen year (year minus birth year), so someone born in 1990 turns 36 in 2026. Boundaries: Silent 1928–1945, Boomers 1946–1964, Gen X 1965–1980, Millennials 1981–1996 and Gen Z 1997–2012 follow Pew Research Center; Alpha (2013–2024) starts where Pew’s Gen Z ends, and Beta (2025–2039) follows McCrindle’s definition. Pew groups everyone born before 1928 as the Greatest Generation; we split off the Lost Generation (1883–1900) and use 1901–1927 for the Greatest, the conventional ranges for the oldest cohorts. McCrindle’s own ranges for the middle generations differ slightly (Gen Y 1980–1994, Gen Z 1995–2009).
- birth year
- The calendar year you were born
- chosen year
- Year used to express ages (defaults to 2026)
Worked examples
Born in 1990
Millennials were born from 1981 to 1996, a 16-year span. 1990 is the 10th year of that span — a mid-wave Millennial — and turns 36 in 2026.
Born in 1997 — first year of Gen Z
Pew starts Gen Z in 1997, so a 1997 birth is the very first Gen Z year and turns 29 in 2026. Because it sits right on the boundary, many people born then also call themselves Zillennials.
Born in 1955
The post-war Baby Boom ran 1946–1964, 19 birth years. 1955 is the 10th of them, right in the middle, and someone born that year turns 71 in 2026.
Frequently asked questions
What years are Millennials?+
Pew Research Center defines Millennials (Generation Y) as people born from 1981 through 1996. In 2026 they are between 30 and 45 years old. Some other sources start the generation in 1980 or end it in 1994–1995.
What years are Gen Z?+
Generation Z is usually defined as people born from 1997 through 2012, following Pew Research Center. The oldest Gen Z members turn 29 in 2026 and the youngest turn 14.
What years are Gen X and Baby Boomers?+
Baby Boomers were born 1946–1964, during the post-World War II birth surge, and Generation X was born 1965–1980. In 2026 Boomers are 62–80 and Gen X are 46–61.
What comes after Gen Alpha?+
Gen Alpha covers children born roughly 2010–2024 (2013–2024 if you follow Pew’s Gen Z end year). Babies born from 2025 onward are commonly called Generation Beta, a name popularised by demographer Mark McCrindle, expected to run to about 2039.
Why do different websites give different generation years?+
There is no official government definition of most generations. Researchers, marketers and media outlets choose cut-offs based on major events and birth-rate shifts, so ranges can differ by a year or two, especially at the edges.
Sources
- Pew Research Center — Where Millennials end and Generation Z begins
- Pew Research Center — The whys and hows of generations research (Silent, Boomer, Gen X ranges)
- Pew Research Center — The growing diversity of Black America (Gen Z defined as born 1997–2012)
- McCrindle — The generations defined (Alpha 2010–2024, Beta 2025–2039)