Age Calculator
Enter your date of birth to find your exact age in years, months, days, hours — and how many days until your next birthday.
🎂 Enter Your Date of Birth
Select your date of birth above to see your exact age
Quick Reference — Age by Birth Year
| Birth Year | Age (in 2026) | Generation |
|---|---|---|
| 2000 | 25–26 | Gen Z |
| 1995 | 30–31 | Gen Z / Millennial |
| 1990 | 35–36 | Millennial |
| 1985 | 40–41 | Millennial |
| 1980 | 45–46 | Gen X |
| 1975 | 50–51 | Gen X |
| 1970 | 55–56 | Baby Boomer / Gen X |
How Is Age Calculated?
Age is calculated by finding the difference between your date of birth and today's date. The calculation counts complete years first, then remaining complete months, and finally leftover days. For example, if you were born on June 15, 1990, and today is March 28, 2026, your exact age is 35 years, 9 months, and 13 days.
To convert age into total days, the calculator counts every single day from your birth date to today, including leap year days. Total months are calculated by counting each complete calendar month, and total weeks by dividing total days by 7.
Leap Year Handling
If you were born on February 29 (a leap day), your birthday only occurs every 4 years on the actual date. In non-leap years, the calculator counts your birthday as March 1 for the purpose of determining your next birthday. Leap years occur every 4 years, except for years divisible by 100 — unless they are also divisible by 400. So 2000 was a leap year, but 1900 was not.
Why Exact Age Matters
Knowing your exact age can be important for a number of reasons: legal age requirements (voting, driving, drinking), retirement planning, insurance and medical assessments, and even astrological calculations. Many official documents and government forms require your exact age in years, months, and days.
For health-related calculations, your precise age affects BMI percentile charts (especially for children), vaccine schedules, and developmental milestones. In sports, age categories often depend on your exact birth date relative to a cutoff date.
Frequently Asked Questions
- How do I calculate my exact age?
- Enter your date of birth into the calculator above. It will instantly show your age broken down into years, months, and days, as well as total months, weeks, days, and hours. The calculation accounts for varying month lengths and leap years.
- How many days old am I?
- Use the age calculator above — enter your birth date and it displays your total age in days. For a rough estimate, multiply your age in years by 365.25 (accounting for leap years). For example, at age 30, you're approximately 10,958 days old.
- How do I calculate age in months?
- Multiply your full years by 12, then add the remaining months. For example, if you are 25 years and 7 months old, your age in months is (25 × 12) + 7 = 307 months. Our calculator computes this automatically.
- How many days until my next birthday?
- The calculator shows this automatically. It finds your upcoming birthday in the current or next year, computes the days remaining, and tells you what day of the week it falls on. If your birthday is today, it will show 0 days remaining.
- What day of the week was I born on?
- Enter your birth date and the calculator will display the day of the week (Monday, Tuesday, etc.) that you were born. This is computed from the date using the standard calendar system.