How your exact age is worked out
Counting age sounds simple until months get involved, because months have 28 to 31 days. This calculator works the way you'd count on a calendar:
- Count the whole years from the birth date to the "age on" date.
- From the last birthday, count the whole months.
- Count the days left over.
When the birth day doesn't exist in a month, we use that month's last day. Someone born on January 31 is counted as one month old on February 28 (or 29 in a leap year), not on March 3. The totals in weeks and days are exact counts of days between the two dates.
Age by birth year
If you only need a quick answer, find the birth year below. The first age applies until the birthday in 2026; the second applies from the birthday on.
| Born in | Before birthday in 2026 | From birthday in 2026 |
|---|---|---|
| 2025 | 0 | 1 |
| 2024 | 1 | 2 |
| 2023 | 2 | 3 |
| 2022 | 3 | 4 |
| 2021 | 4 | 5 |
| 2020 | 5 | 6 |
| 2019 | 6 | 7 |
| 2018 | 7 | 8 |
| 2017 | 8 | 9 |
| 2016 | 9 | 10 |
| 2015 | 10 | 11 |
| 2014 | 11 | 12 |
| 2013 | 12 | 13 |
| 2012 | 13 | 14 |
| 2011 | 14 | 15 |
| 2010 | 15 | 16 |
| 2009 | 16 | 17 |
| 2008 | 17 | 18 |
| 2007 | 18 | 19 |
| 2006 | 19 | 20 |
| 2005 | 20 | 21 |
| 2004 | 21 | 22 |
| 2003 | 22 | 23 |
| 2002 | 23 | 24 |
| 2001 | 24 | 25 |
| 2000 | 25 | 26 |
| 1999 | 26 | 27 |
| 1998 | 27 | 28 |
| 1997 | 28 | 29 |
| 1996 | 29 | 30 |
| 1995 | 30 | 31 |
| 1994 | 31 | 32 |
| 1993 | 32 | 33 |
| 1992 | 33 | 34 |
| 1991 | 34 | 35 |
| 1990 | 35 | 36 |
| 1989 | 36 | 37 |
| 1988 | 37 | 38 |
| 1987 | 38 | 39 |
| 1986 | 39 | 40 |
| 1985 | 40 | 41 |
| 1984 | 41 | 42 |
| 1983 | 42 | 43 |
| 1982 | 43 | 44 |
| 1981 | 44 | 45 |
| 1980 | 45 | 46 |
| 1979 | 46 | 47 |
| 1978 | 47 | 48 |
| 1977 | 48 | 49 |
| 1976 | 49 | 50 |
| 1975 | 50 | 51 |
| 1974 | 51 | 52 |
| 1973 | 52 | 53 |
| 1972 | 53 | 54 |
| 1971 | 54 | 55 |
| 1970 | 55 | 56 |
| 1969 | 56 | 57 |
| 1968 | 57 | 58 |
| 1967 | 58 | 59 |
| 1966 | 59 | 60 |
| 1965 | 60 | 61 |
| 1964 | 61 | 62 |
| 1963 | 62 | 63 |
| 1962 | 63 | 64 |
| 1961 | 64 | 65 |
| 1960 | 65 | 66 |
| 1959 | 66 | 67 |
| 1958 | 67 | 68 |
| 1957 | 68 | 69 |
| 1956 | 69 | 70 |
| 1955 | 70 | 71 |
| 1954 | 71 | 72 |
| 1953 | 72 | 73 |
| 1952 | 73 | 74 |
| 1951 | 74 | 75 |
| 1950 | 75 | 76 |
| 1949 | 76 | 77 |
| 1948 | 77 | 78 |
| 1947 | 78 | 79 |
| 1946 | 79 | 80 |
| 1945 | 80 | 81 |
| 1944 | 81 | 82 |
| 1943 | 82 | 83 |
| 1942 | 83 | 84 |
| 1941 | 84 | 85 |
| 1940 | 85 | 86 |
Leap-day birthdays
About one person in 1,461 is born on February 29. In common years we treat February 28 as their birthday, so they never "skip" a year of age. Legal systems don't all agree: some treat March 1 as the day a leap-day baby comes of age. If an age limit matters legally, such as for a license or a benefit, check the rule where you live.
Other ways people count age
This calculator uses the international convention, where you are 0 at birth and gain a year on each birthday. Some traditions count differently. The traditional Korean system, for example, counted a newborn as 1 and added a year every New Year, though South Korea officially moved to the international method in June 2023.
Questions people ask
How is exact age calculated?
We count the whole years and months that have passed since the birth date, then the days left over. Someone born on June 15, 1990 is 36 years, 4 months and 29 days old on November 13, 2026.
How old am I if I was born in 1990?
In 2026 you are 35 until your birthday and 36 from your birthday on. The table on this page lists every birth year, and the calculator gives your exact age to the day.
When does someone born on February 29 have a birthday?
This calculator uses February 28 in years without a February 29. Laws differ on this: in some places a leap-day baby legally turns a year older on March 1, so check local rules for legal ages such as driving or drinking.
Why does my age in days look different from other calculators?
Some tools count both the first and the last day, which adds one. We count the days between the two dates, the same way you would count nights, so a baby born yesterday is 1 day old.
Can I calculate my age on a past or future date?
Yes. Change the “Age on” date to any day after the birth date, for example to see how old you will be when a mortgage ends or how old a relative was in a photo.