Age Calculator — Free Online Tool
Enter a birth date and see the precise age broken down into years, months, and days. Also shows total days lived, the day of the week you were born, and the exact number of days until your next birthday. All calculations are local — no network request needed.
100% client-side. No uploads. Your data never leaves your browser.
How to use Age Calculator
- Enter a birth date using the date picker.
- Age in years, months, and days appears instantly.
- Check the 'Days until next birthday' field at the bottom.
- See the day of the week you were born under the results.
Frequently Asked Questions
How precise is the age calculation?
The calculation accounts for varying month lengths and leap years. It computes exact years, months, and remaining days as of today's date.
Can I calculate someone else's age?
Yes. Simply enter any birth date — it does not have to be yours.
What timezone is used?
The browser's local timezone is used for 'today'. If you are near midnight, the result may differ by a day from someone in a different timezone.
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