Generation From Birth Year Calculator

Enter your birth year (or full birth date) and the calculator returns the named generation whose year range includes it. The cohorts are Greatest (1901 to 1927), Silent (1928 to 1945), Baby Boomers (1946 to 1964), Generation X (1965 to 1980), Millennials (1981 to 1996), Generation Z (1997 to 2012), Generation Alpha (2013 to 2024), and Generation Beta (2025 to 2039). Because the ranges chain with no gaps or overlaps, exactly one generation matches any year.

This tool uses the Pew Research Center boundaries for the modern cohorts: Silent 1928 to 1945, Boomers 1946 to 1964, Gen X 1965 to 1980, Millennials 1981 to 1996, and Gen Z 1997 to 2012. Pew has not formally bounded the Greatest, Alpha, and Beta cohorts, so it uses the widely cited generational-research ranges that chain with Pew: Greatest 1901 to 1927, Alpha 2013 to 2024, and Beta 2025 to 2039.

For a chosen reference year, the youngest member's age equals the reference year minus the cohort's last birth year, and the oldest member's age equals the reference year minus the cohort's first birth year. For example, in 2024 the Millennials (1981 to 1996) range from 28 to 43 years old. Ages are floored at 0, so a cohort whose start year is still in the future shows no living members yet.

No. Generations are defined by birth year alone, so anyone born in the same calendar year belongs to the same cohort regardless of month or day. Entering a full birth date only sharpens your own exact age (it checks whether your birthday has passed in the reference year). The generation label itself depends solely on the year.

There is no single official authority, so researchers draw cutoffs slightly differently. Pew Research is the most cited US standard, but outlets and demographers sometimes shift a boundary by a year or two, especially at the Gen X to Millennial and Millennial to Gen Z edges. This calculator follows the common Pew and McCrindle ranges, so treat people born within a year of a boundary as a cusp who may identify with either side.

Generation Alpha (born 2013 to 2024) follows Gen Z and is the first cohort born entirely in the 21st century. After Alpha comes Generation Beta, defined as births from 2025 to 2039. These newer names come mainly from demographer Mark McCrindle and are still settling into common use, so their exact spans may be revised over time.