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Age Calculator
Find your exact age in years, months and days — plus total days lived, your next birthday countdown, zodiac sign and generation.
About Age Calculation
Exact Age
Calculated precisely in completed years, months and days — not just a rounded estimate — accounting for varying month lengths and leap years.
Next Birthday
See exactly how many days remain until your next birthday, and what age you'll be turning.
Zodiac Sign
Your Western zodiac sign is derived automatically from your date of birth.
Generation
Find out whether you're part of Gen Alpha, Gen Z, Millennial, Gen X, or a Baby Boomer based on your birth year.
How to Use the Age Calculation
Enter Your Birth Date
Pick your date of birth using the date field — your age updates instantly.
Choose the "As Of" Date
By default your age is calculated as of today, but you can pick any custom date instead — useful for eligibility checks or forms.
View the Full Breakdown
See your age in years/months/days, total days and hours lived, and your zodiac sign and generation.
Check Your Birthday Countdown
See exactly how many days remain until your next birthday and what age you'll turn.
Frequently Asked
Questions
1. How is exact age calculated?
The calculator counts completed years, months, and days between your date of birth and the selected “as of” date. It accounts for different month lengths and leap years, so the result is your exact chronological age, not a rounded approximation.
2. Why would I use a custom "as of" date instead of today?
Many forms and eligibility checks (school admissions, visa applications, competition age limits) require your age as of a specific cutoff date rather than today. The custom date option lets you calculate your age exactly as it would appear on that date.
3. How is my generation determined?
Generations are grouped by commonly used birth-year ranges: Gen Alpha (2013 onward), Gen Z (1997–2012), Millennials (1981–1996), Gen X (1965–1980), and Baby Boomers (1946–1964). These ranges are widely used approximations, not official boundaries.
4. Is my birth date stored anywhere?
No. All calculations run entirely in your browser using JavaScript. Your date of birth is never sent to, or stored on, any server.
