Age Calculator
Knowing your exact age down to the day can be surprisingly useful. Whether you are filling out an official form, planning a milestone birthday celebration, or simply curious, this free age calculator gives you precise results in seconds. Enter your date of birth and instantly see your age broken down into years, months, and days. For timestamp-based date conversions, use the Unix Timestamp Converter. The tool also displays your age as total months, total weeks, and total days for a different perspective on the time that has passed. Need to calculate a percentage of your lifespan or any other ratio? Try the Percentage Calculator. A handy next birthday countdown tells you exactly how many months and days remain until your next celebration. All calculations are performed locally in your browser with no data sent to any server. The date picker works on both desktop and mobile devices. Bookmark this page for quick access whenever you need to calculate an age or count down to a special date.
How to Use This Tool
- Enter your date of birth — use the date picker or type the date manually in the input field.
- View your exact age — the result appears instantly, broken down into years, months, and days.
- Check additional breakdowns — see your age expressed as total months, total weeks, and total days.
- See your birthday countdown — find out exactly how long until your next birthday.
Examples
Born January 15, 1990
Date of birth: January 15, 1990
Age: 36 years, 6 months, 2 days
As of July 17, 2026.
Total days breakdown
Same birth date (Jan 15, 1990):
- Total months: 438
- Total weeks: 1,904
- Total days: 13,332
A different perspective on the time elapsed since birth.
Born on a leap day: February 29, 2000
Date of birth: February 29, 2000
Age: 26 years, 4 months, 18 days
Leap year births are handled correctly with no rounding errors.
What This Tool Is Useful For
- Passport and visa applications — many forms require your exact age in years, months, and days on the date of submission.
- Insurance and health forms — premiums and eligibility often depend on precise age brackets.
- Birthday and milestone planning — count down to a 30th, 50th, or any other significant birthday.
- Retirement planning — know exactly how many years and months remain until your target retirement age.
- School enrollment eligibility — check if a child meets the minimum age cutoff for kindergarten or grade entry.
Frequently Asked Questions
- Does the age calculator account for leap years?
- Yes. The calculator uses the actual calendar, so February 29 in leap years is fully accounted for. Whether you were born on a leap day or not, the day count is always exact.
- How is age calculated in months?
- The tool counts complete calendar months from your birth date to today. Any remaining days after the last complete month are shown separately rather than being rounded up.
- Can I calculate age for a future date?
- This calculator is intended for past dates of birth. Entering a future date will produce a zero result or indicate the date hasn't arrived yet. To plan ahead, enter a past date and reference the birthday countdown section.
- How accurate is the total days count?
- The total days figure is exact. It factors in every leap year and the varying lengths of each month between your birth date and today.
- Can I use this for official documents like passport applications?
- The calculator provides an accurate age you can reference when filling out forms. That said, always verify requirements with the issuing agency, since some jurisdictions use different age-reckoning systems (for example, Korean age counts differently from international age).
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