Birth Year Calculator
Enter an age to work out the year of birth, depending on whether the birthday has already happened this year. Works for any reference year.
How to work out a birth year
Birth year = current year − age Subtract 1 more if the birthday has not happened yet this year
Worked example
Someone who is 16 in 2026 was born in 2010 if they have already had their birthday this year, or in 2009 if their birthday is still to come.
Quick reference for 2026
| Age in 2026 | Born in (birthday passed) | Born in (birthday to come) |
|---|---|---|
| 13 | 2013 | 2012 |
| 16 | 2010 | 2009 |
| 18 | 2008 | 2007 |
| 21 | 2005 | 2004 |
| 30 | 1996 | 1995 |
| 50 | 1976 | 1975 |
Frequently asked questions
What year was I born if I am 18?
In 2026, 2008 if you have had your birthday this year, otherwise 2007.
Why are there two possible years?
Your age only goes up on your birthday, so the year depends on whether that date has passed.
Can I use a different year?
Yes. Change the year field to find a birth year from any point in time.
How do I find my exact age?
Use the age calculator with your date of birth.
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