Birth Year Calculator

Enter your age to find what year you were born. An age can match two possible years, so the calculator shows both, and you pin the exact one by saying whether your birthday has happened yet this year. It also names the generation your birth year falls into.

How old are you?

On this date

Has your birthday already happened in 2026?

What is a birth year calculator?

A birth year calculator works backward from your age to the year you were born. You enter how old you are, and it subtracts that from the current year. The one catch: if your birthday hasn't happened yet this year, you were born a year earlier than a simple subtraction suggests, so the exact answer depends on whether your birthday has already passed.

How to calculate your birth year

There are just two cases:

Birthday already passed this year: birth year = current year − age
Birthday hasn't happened yet: birth year = current year − age − 1

Example. If you're 30 right now, subtract: 2026 − 30 = 1996 if your birthday has already happened this year, or 2026 − 30 − 1 = 1995 if it hasn't.

Age to birth year chart for 2026

Find the age in the first column. If the birthday has already come around in 2026, the birth year is in the middle column. If it is still ahead, read the last column.

Birth year for every age from 1 to 100 in 2026
Age	Birthday passed	Birthday not yet
1	2025	2024
2	2024	2023
3	2023	2022
4	2022	2021
5	2021	2020
6	2020	2019
7	2019	2018
8	2018	2017
9	2017	2016
10	2016	2015
11	2015	2014
12	2014	2013
13	2013	2012
14	2012	2011
15	2011	2010
16	2010	2009
17	2009	2008
18	2008	2007
19	2007	2006
20	2006	2005
21	2005	2004
22	2004	2003
23	2003	2002
24	2002	2001
25	2001	2000
26	2000	1999
27	1999	1998
28	1998	1997
29	1997	1996
30	1996	1995
31	1995	1994
32	1994	1993
33	1993	1992
34	1992	1991
35	1991	1990
36	1990	1989
37	1989	1988
38	1988	1987
39	1987	1986
40	1986	1985
41	1985	1984
42	1984	1983
43	1983	1982
44	1982	1981
45	1981	1980
46	1980	1979
47	1979	1978
48	1978	1977
49	1977	1976
50	1976	1975
51	1975	1974
52	1974	1973
53	1973	1972
54	1972	1971
55	1971	1970
56	1970	1969
57	1969	1968
58	1968	1967
59	1967	1966
60	1966	1965
61	1965	1964
62	1964	1963
63	1963	1962
64	1962	1961
65	1961	1960
66	1960	1959
67	1959	1958
68	1958	1957
69	1957	1956
70	1956	1955
71	1955	1954
72	1954	1953
73	1953	1952
74	1952	1951
75	1951	1950
76	1950	1949
77	1949	1948
78	1948	1947
79	1947	1946
80	1946	1945
81	1945	1944
82	1944	1943
83	1943	1942
84	1942	1941
85	1941	1940
86	1940	1939
87	1939	1938
88	1938	1937
89	1937	1936
90	1936	1935
91	1935	1934
92	1934	1933
93	1933	1932
94	1932	1931
95	1931	1930
96	1930	1929
97	1929	1928
98	1928	1927
99	1927	1926
100	1926	1925

Which generation is your birth year?

Once you know your birth year, here's the generation it falls into (US cohorts, by the widely used Pew Research / Beresford Research year ranges). Cusp years are debated, so treat the edges as approximate.

Generation	Birth years
Greatest Generation	1901–1927
Silent Generation	1928–1945
Baby Boomers	1946–1964
Generation X	1965–1980
Millennials	1981–1996
Generation Z	1997–2012
Generation Alpha	2013–2024
Generation Beta	2025–present

How to use this calculator

Type your age in whole years.
Leave the date set to today, or change it to find the birth year for an age on any date.
Pick whether your birthday has happened this year, or leave it on "Not sure" to see both years.
Read your birth year and generation. Use Copy to grab the result.

Frequently Asked Questions

What year was I born if I am 30?

If you are 30, subtract 30 from the current year (2026): you were born in 1996 if your birthday has already happened this year, or 1995 if it hasn't. The calculator shows both and lets you pin the exact one.

How do I calculate my birth year from my age?

Subtract your age from the current year. If your birthday has already happened this year, that's your birth year. If it hasn't happened yet, subtract one more year.

Why does the calculator show two birth years?

Your age alone can't reveal the exact year, because it depends on whether your birthday has happened yet this year. Two people who are both 30 today can be born in different years. Most calculators quietly pick one; this one shows both and lets you pin the right one in a tap.

What year were you born if you are 18?

You were born in 2008 if your birthday has already passed this year, or 2007 if it hasn't.

What generation does my birth year belong to?

The result labels your year with its generation. As a quick guide: Baby Boomers 1946–1964, Gen X 1965–1980, Millennials 1981–1996, Gen Z 1997–2012, Gen Alpha 2013–2024. See the full table above.

Is my data stored anywhere?

No. Everything is calculated in your browser. Nothing you enter is sent to a server or saved.