How to Calculate Your Age
Calculating your exact age means finding the difference between your date of birth and today's date. While the concept is simple, doing it accurately requires accounting for leap years, varying month lengths, and whether your birthday has passed yet this year.
Our age calculator handles all of this automatically. Simply enter your date of birth and it instantly shows your age in years, months, days, hours, and minutes — plus a countdown to your next birthday.
Age in Different Units
Most people know their age in years, but it's often useful to know your age in other units too. Parents track their baby's age in weeks and months. Doctors and medical professionals use exact age in years and months. HR professionals check ages in years for legal compliance purposes.
Here's a quick reference: a 30-year-old is approximately 360 months, 1,565 weeks, or 10,957 days old — depending on the exact date of birth.
How Old Are People Born in Common Years?
Here's a quick reference table showing the age of people born in common years, as of 2026. Use the calculator above for exact ages including months and days.
| Birth Year | Age in 2026 | Generation |
|---|
| 1960 | 65–66 years old | Baby Boomer |
| 1965 | 60–61 years old | Baby Boomer |
| 1970 | 55–56 years old | Generation X |
| 1975 | 50–51 years old | Generation X |
| 1980 | 45–46 years old | Millennial |
| 1985 | 40–41 years old | Millennial |
| 1990 | 35–36 years old | Millennial |
| 1995 | 30–31 years old | Millennial |
| 2000 | 25–26 years old | Generation Z |
| 2005 | 20–21 years old | Generation Z |
| 2010 | 15–16 years old | Generation Z |
| 2015 | 10–11 years old | Generation Alpha |
| 2020 | 5–6 years old | Generation Alpha |
Frequently Asked Questions
How old am I if I was born in 1990?
If you were born in 1990, you are 35 or 36 years old in 2026, depending on whether your birthday has already passed this year. Enter your exact date of birth in the calculator above to get your precise age in years, months, and days.
How old is someone born in 2000?
Someone born in 2000 is 25 or 26 years old in 2026. They belong to Generation Z. Use the calculator for an exact figure based on their specific birthday.
How many days old am I?
The calculator above shows exactly how many days old you are. As a rough guide: a 30-year-old is around 10,957 days old, a 25-year-old around 9,131 days, and a 40-year-old around 14,610 days. Enter your date of birth for the exact number.
What year was I born if I am 30?
If you are 30 years old in 2026, you were born in 1995 or 1996. Use the Birth Year Lookup tab above — enter your age and it calculates your birth year instantly.
How old will I be in 2030?
Use the Future Age tab above. Enter your date of birth and the date January 1, 2030. For example, someone born in 1995 will be 34 or 35 years old in 2030.
How do I calculate the age difference between two people?
Use the Age Difference tab above. Enter both dates of birth and the calculator shows the exact gap in years, months, and days, and tells you who is older.
How old am I in months?
The calculator shows your total age in months as part of the breakdown. A 25-year-old is approximately 300 months old. A 30-year-old is around 360 months. Enter your exact birthday above for your precise age in months.
Does the age calculator account for leap years?
Yes. Our calculator accounts for leap years when calculating the exact number of days. Leap years occur every 4 years (with some exceptions) and add an extra day — February 29 — to the calendar.