Use this calculator to easily calculate your age, or the age of someone else. Just enter the birth date or birth year and click "calculate" to get your age in years, months, weeks, and days to use it as a "how old am I calculator". Calculate an approximate age by just entering the year you were born in.
Quick navigation:
- How to calculate your age?
- How old am I?
- How old in 2025?
How to calculate your age?
This free online age calculator, a.k.a. Pearson age calculator, makes it as easy as possible to calculate the age of a person, movable property, real estate, institution, or a company. All you need to enter is the date of birth / construction / establishment, etc., and click "Calculate age". The result will show you the number of full years, months, weeks, and days and is useful when answering questions like "how old am I in years", "how old am I in days" or "how old am I in months", "how old is someone", "how old is something", and so on.
Alternatively, enter just the year you were born in to get an approximate chronological age and running age in 2025 or any other year of interest, be it in the future or in the past.
If you are asking yourself how old you are and want to get the answer by hand, you would need to make sure you account for leap years (366 instead of 365 days, February gets an extra day), so it can be a tedious task. If you are doing this calculation for a historical figure, then you would need to take into account possible differences in the calendar used when they were born and nowadays. For example, some Eastern European countries used the Julian calendar until they switched to the Gregorian one in the late 19-th and early 20-th century (in different years for the different countries).
The age calculator by date of birth can also help you calculate your age at any given point in time after your date of birth (DoB). To do so, simply specify the date on which to calculate the age in the field labeled as such. If you need to know your age by the hour, minute or second, you can use our time duration calculator instead.
How old am I?
While looking deceptively simple, the answer to the above question is not nearly as straightforward as you think. But you might say that even 2-3 year-olds can use their fingers to answer that question, so how hard could it be, right? Answering "How old am I?" is actually pretty complex - read on to learn why.
This age calculator is based on the way human age is calculated in most Western countries. This means that when a person is born their age is 0 and it becomes 1 exactly a year from their birth, or as we say, on their birthday. The same goes for property, establishments, etc.
In other cultures, such as in East Asian, age reckoning is different. In some countries, a person begins their life at the age of 1 (by Western standard). Then another year is added to their age at New Year’s Day, even if this happens to be the second day of their life. This has largely to do with traditional fortune-telling methods and religion; and it could create a difference in a person’s age of one or two years between Western and Eastern counting systems.
To add to the confusion, when asked about their age some people present their complete age, while others present their running age. So for example, if at your last birthday you have completed your 21st year you might say that you are 21-years-old. However, you could also say you are 22-years-old, which would be your running age (as in the age you are currently towards completing).
It is not so obvious how to answer the "how old are you" question now, is it? Even our birthday calculator will only give you one of the possible answers when given your date of birth...
How old in 2025?
Below is a handy table you can use to quickly calculate your approximate age based on just your year of birth. It is great in figuring out, for example, if you were born in 1998, how old are you in 2025?
| Year of birth | Current age* |
|---|---|
| 2024 | 1 year old |
| 2023 | 2 years old |
| 2022 | 3 years old |
| 2021 | 4 years old |
| 2020 | 5 years old |
| 2019 | 6 years old |
| 2018 | 7 years old |
| 2017 | 8 years old |
| 2016 | 9 years old |
| 2015 | 10 years old |
| 2014 | 11 years old |
| 2013 | 12 years old |
| 2012 | 13 years old |
| 2011 | 14 years old |
| 2010 | 15 years old |
| 2009 | 16 years old |
| 2008 | 17 years old |
| 2007 | 18 years old |
| 2006 | 19 years old |
| 2005 | 20 years old |
| 2004 | 21 years old |
| 2003 | 22 years old |
| 2002 | 23 years old |
| 2001 | 24 years old |
| 2000 | 25 years old |
| 1999 | 26 years old |
| 1998 | 27 years old |
| 1997 | 28 years old |
| 1996 | 29 years old |
| 1995 | 30 years old |
| 1994 | 31 years old |
| 1993 | 32 years old |
| 1992 | 33 years old |
| 1991 | 34 years old |
| 1990 | 35 years old |
| 1989 | 36 years old |
| 1988 | 37 years old |
| 1987 | 38 years old |
| 1986 | 39 years old |
| 1985 | 40 years old |
| 1984 | 41 years old |
| 1983 | 42 years old |
| 1982 | 43 years old |
| 1981 | 44 years old |
| 1980 | 45 years old |
| 1979 | 46 years old |
| 1978 | 47 years old |
| 1977 | 48 years old |
| 1976 | 49 years old |
| 1975 | 50 years old |
| 1974 | 51 years old |
| 1973 | 52 years old |
| 1972 | 53 years old |
| 1971 | 54 years old |
| 1970 | 55 years old |
| 1969 | 56 years old |
| 1968 | 57 years old |
| 1967 | 58 years old |
| 1966 | 59 years old |
| 1965 | 60 years old |
| 1964 | 61 years old |
| 1963 | 62 years old |
| 1962 | 63 years old |
| 1961 | 64 years old |
| 1960 | 65 years old |
| 1959 | 66 years old |
| 1958 | 67 years old |
| 1957 | 68 years old |
| 1956 | 69 years old |
| 1955 | 70 years old |
| 1954 | 71 years old |
| 1953 | 72 years old |
| 1952 | 73 years old |
| 1951 | 74 years old |
| 1950 | 75 years old |
| 1949 | 76 years old |
| 1948 | 77 years old |
| 1947 | 78 years old |
| 1946 | 79 years old |
| 1945 | 80 years old |
| 1944 | 81 years old |
| 1943 | 82 years old |
| 1942 | 83 years old |
| 1941 | 84 years old |
| 1940 | 85 years old |
| 1939 | 86 years old |
| 1938 | 87 years old |
| 1937 | 88 years old |
| 1936 | 89 years old |
| 1935 | 90 years old |
| 1934 | 91 years old |
| 1933 | 92 years old |
| 1932 | 93 years old |
| 1931 | 94 years old |
| 1930 | 95 years old |
| 1929 | 96 years old |
| 1928 | 97 years old |
| 1927 | 98 years old |
| 1926 | 99 years old |
| 1925 | 100 years old |
The table shows how old you would be at the end of 2025. Essentially it shows how many years there are between the year your were born in and the current year. For an accurate age calculation that applies to the current date enter your exact birth date in the age calculator above.
Running age vs. completed age
Whether you present your running age or completed age when asked how old you are is a matter of context, customs, or in some cases requirements of the document you need to fill, which may include legal instructions. Always follow those when provided, or ask if not sure.
Regardless, once you know what age you should present, you need to calculate it by using your date of birth. To calculate the completed age, determine how many full years have passed since your birth date. To compute the running age, simply add one to the completed age. It is as simple as that.
How old was I on a given date?
With the use of the "Calculate age on" field one can specify a date in the past to check how old they were on that date. For example, you might want to check how old you were at the opening ceremony of the 2012 Summer Olympic Games, just enter your date of birth in the first field, the starting date of the games in the second, and press calculate. For example, if you were born on Apr 10, 1985, you would have been 27 years old, or to be precise - 9970 days old.
How old will you be in a given year?
Specifying any future date in the "Calculate age on" field allows the calculation of your age in a given year into the future. For example, you might want to check how old will you be in 2030, 2040, 2050, 2060, etc. Say you were born in 1980, then you will be 50 years old in 2030 (2030 - 1980 = 50), 60 years old in 2040 (2040 - 1980 = 60), and so on. In a slightly more complicated example, if someone was born in 1994, then in 2040 they will be 46 years old.
Note that the field requires that you specify an exact date for the calculation. To calculate your completed age by the end of the year of interest, just enter 31/12/YYYY. To check your running age at that year, simply enter 01/01/YYYY. These examples assume you are not born on Jan 1 or Dec 31.
How many days have I lived?
Checking how many days, weeks, or months one has been alive is easy using this age calculator. The calculator outputs these numbers for all calculations performed, so simply enter your DoB and press the button to see the answer. As an example, a person born on Jan 1, 1988 would have been alive for exactly 13,577 days by Mar 04, 2025. That would make for a chronological age of 37 years, 2 months, and 3 days.
How old is someone or something
Other than for yourself, an age calculator is useful to compute the age of someone or something else (a.k.a. "Pearson age"). For example, if you are wondering how old Mariah Carey is, you would look up her date of birth, enter it in the "Birth date" field, and the tool will give you the answer. Alternatively, you can specify a date in the future to see, for example, how old she will be when you are fifty. You can do that for any person for whom the date of birth is known.
Likewise, you can calculate how old a house, a car, or even your grandma's refrigerator is. It can also be used to determine the age of a company or institution, e.g. if you wonder how old the US constitution is, you can enter September 17, 1787 in the "birth date" field and get an answer in a second.
