Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Knowing your exact age is useful for filling out official forms, verifying eligibility requirements for programs and services, and satisfying simple curiosity. Medical professionals sometimes need a patient age expressed in precise years and months. Parents tracking child development milestones benefit from an exact breakdown rather than a rough estimate.
The tool computes your age relative to today by walking through calendar months and days, so it correctly accounts for varying month lengths and leap years. The days-alive count uses a straightforward difference between your birth date and the current date. The next-birthday countdown finds the upcoming occurrence of your birth month and day and returns the number of days until that date.
All processing happens in your browser. Your date of birth is never sent to any server, stored in any database, or shared with any third party.
Calculator
Results
How to Use
- Enter your date of birth in YYYY-MM-DD format.
- The tool calculates your exact age, total days alive, and days until your next birthday.
- Copy any result you need from the output fields.
FAQ
Does this account for leap years?
Yes. The calculator uses JavaScript Date objects that handle leap years correctly, so February 29 birthdays and leap-year day counts are accurate.
What if I enter a future date?
The tool expects a past date. If you enter a future date, the results may not be meaningful.
Is my date of birth stored anywhere?
No. All calculations run entirely in your browser. Your date of birth is never transmitted to any server.
Is my data safe in the browser?
Yes. All calculations run locally in your browser using JavaScript. No data is sent to any server.
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