How old am I, by birth year

Someone born in 1990 is 35 until their birthday and 36 after it. There is no single answer without the date, which is why every year below carries both numbers — and why a page that prints one of them is right for part of the year and wrong for the rest.

There is no single answer. Someone born in 1990 is 35 until their birthday comes round and 36 after it, so every year below carries both. Pages that print one number are wrong for roughly half the people who read them, and which half changes every day of the year.

Both answers, always

Age counts completed birthdays. Subtracting the years gives the higher one, which is right only after the birthday has passed.

Recomputed against today

The pair moves on 1 January. These are rebuilt hourly rather than baked once and left to go stale.

And the exact number

Put your real date of birth into the calculator on any of these pages and the pair collapses to the one that is yours.

Born in the 1920s

1925: 100 or 101 1926: 99 or 100 1927: 98 or 99 1928: 97 or 98 1929: 96 or 97

Born in the 1930s

1930: 95 or 96 1931: 94 or 95 1932: 93 or 94 1933: 92 or 93 1934: 91 or 92 1935: 90 or 91 1936: 89 or 90 1937: 88 or 89 1938: 87 or 88 1939: 86 or 87

Born in the 1940s

1940: 85 or 86 1941: 84 or 85 1942: 83 or 84 1943: 82 or 83 1944: 81 or 82 1945: 80 or 81 1946: 79 or 80 1947: 78 or 79 1948: 77 or 78 1949: 76 or 77

Born in the 1950s

1950: 75 or 76 1951: 74 or 75 1952: 73 or 74 1953: 72 or 73 1954: 71 or 72 1955: 70 or 71 1956: 69 or 70 1957: 68 or 69 1958: 67 or 68 1959: 66 or 67

Born in the 1960s

1960: 65 or 66 1961: 64 or 65 1962: 63 or 64 1963: 62 or 63 1964: 61 or 62 1965: 60 or 61 1966: 59 or 60 1967: 58 or 59 1968: 57 or 58 1969: 56 or 57

Born in the 1970s

1970: 55 or 56 1971: 54 or 55 1972: 53 or 54 1973: 52 or 53 1974: 51 or 52 1975: 50 or 51 1976: 49 or 50 1977: 48 or 49 1978: 47 or 48 1979: 46 or 47

Born in the 1980s

1980: 45 or 46 1981: 44 or 45 1982: 43 or 44 1983: 42 or 43 1984: 41 or 42 1985: 40 or 41 1986: 39 or 40 1987: 38 or 39 1988: 37 or 38 1989: 36 or 37

Born in the 1990s

1990: 35 or 36 1991: 34 or 35 1992: 33 or 34 1993: 32 or 33 1994: 31 or 32 1995: 30 or 31 1996: 29 or 30 1997: 28 or 29 1998: 27 or 28 1999: 26 or 27

Born in the 2000s

2000: 25 or 26 2001: 24 or 25 2002: 23 or 24 2003: 22 or 23 2004: 21 or 22 2005: 20 or 21 2006: 19 or 20 2007: 18 or 19 2008: 17 or 18 2009: 16 or 17

Born in the 2010s

2010: 15 or 16 2011: 14 or 15 2012: 13 or 14 2013: 12 or 13 2014: 11 or 12 2015: 10 or 11 2016: 9 or 10 2017: 8 or 9 2018: 7 or 8 2019: 6 or 7

Born in the 2020s

2020: 5 or 6 2021: 4 or 5 2022: 3 or 4 2023: 2 or 3 2024: 1 or 2 2025: 0 or 1

From a date rather than a year

The age calculator takes a full date of birth and any date to age against, so it answers with one number instead of two — and will age someone at a past or future date as well as today.