Age Calculator
Find your exact age in years, months, and days — or your age as of any other date.
Enter your date of birth above to see your exact age.
Next birthday:
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Total Days
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Total Weeks
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Total Hours
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Total Minutes
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Total Seconds
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Day You Were Born
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Zodiac Sign
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Chinese Zodiac
Chinese zodiac is approximated from the calendar year, not the exact Lunar New Year date.
Built For
Who uses this age calculator
Check Your Own Age
See your exact age in years, months, and days the moment you enter your birth date — no signup, no waiting.
Age As Of Any Date
Set the second field to a past or future date to get your exact age as of that date — perfect for forms and applications.
Track a Baby's Age
Precise days, weeks, hours, and minutes since birth — useful for tracking early development milestones.
Chronological Age for Tests & Forms
Get the precise "chronological age" that schools, clinical assessments, and insurance forms often ask for specifically.
Quick and Simple
How to use the calculator
Enter your date of birth
Type the day, month, and year, or use the calendar icon to pick the date.
Choose the date to calculate as of
The second field defaults to today — change it to check your age as of any past or future date instead.
View your results instantly
Your exact age, totals, next birthday, and trivia appear immediately — nothing to submit, nothing sent to a server.
Simple and Precise
How the age calculation works
The calculator counts full years elapsed since your date of birth, then full months, then whatever days are left over — the same method most people use when working out an age by hand, just instant and exact. Leap years (including February 29 birthdays) and months of different lengths are accounted for automatically, so the result is always calendar-accurate.
Worked example
Born 15 March 1995, checking the age as of 20 August 2026:
- 31 full years have passed (the March 15 birthday already happened earlier in 2026)
- 5 more full months (March → August)
- 5 more days (the 15th to the 20th)
Result: 31 years, 5 months, 5 days
Good to Know
Frequently asked questions
How do I use this age calculator to find my exact age?
Enter your date of birth in the first field. The second field defaults to today, so your exact age in years, months, and days appears instantly — along with totals in weeks, hours, minutes, and seconds. There's no signup and nothing to submit; results update as you type.
Can I calculate my age as of a different date, not just today?
Yes. Change the second field ("Age at the Date of") to any past or future date, and every result recalculates for that date instead of today — useful for checking your exact age as of a date requested on a form, ID document, or eligibility notice.
What is a chronological age calculator, and why does it matter?
Chronological age is the exact calendar time passed since birth — years, months, and days as of a specific reference date — rather than a rounded, casual age. Schools, clinical assessments (such as Pearson-style tests), insurance forms, and medical evaluations often ask for it specifically. Setting the second field to the exact date requested gives you that precise chronological age.
Can I use this as an age calculator for a baby?
Yes. Alongside the years/months/days breakdown, the totals section shows exact days, weeks, hours, and minutes since birth — precise enough for tracking early development milestones.
Do I need to install an app to use this age calculator?
No installation is required. It runs directly in your mobile or desktop browser, works the same whether you search for an age calculator app or just open the page, and can be added to your phone's home screen for quick, one-tap access if you'd like.
What is biological age, and does this tool calculate it?
Biological age is a health-and-fitness estimate of how a body is aging compared to markers like fitness or bloodwork — it's different from chronological (calendar) age. This tool calculates chronological age only: the precise years, months, and days since a given birth date. It doesn't estimate biological or health-based age.
Does the calculator work correctly online, and does it handle leap years?
Yes — it runs entirely online in your browser and accounts for leap years (including February 29 birthdays) and the varying number of days in each month, so the years/months/days breakdown is always calendar-accurate. See "How It Works" above for a worked example.
Is my birth date or any other data stored or sent to a server?
No. Every calculation runs locally in your browser — no dates or personal information are ever sent anywhere. The only things saved on your device are your theme preference (light/dark) and whether you want a site-link watermark included when you share a result, both stored in your browser's localStorage.