Math
Age Calculator
Enter a birth date — the tool calculates exact age, days to next birthday, and total days lived.
Esc Clear
Years
Months
Days
Days to next birthday
Total days lived
Enter your date of birth
What does Age Calculator?
An age calculator that computes exact age in years, months and days — and shows how many days remain until the next birthday.
How to use Age Calculator?
- Select the date of birth.
- The reference date defaults to today — change it to any date.
- Exact age, total days lived, and the birthday countdown appear instantly.
Key features
- Precise age: years, months and days shown separately
- Countdown to the next birthday
- Shows the total number of days you have lived
Frequently asked questions
Can I calculate age relative to a future date?
Yes. Change the reference date to any future date.
How is age calculated exactly?
Age is computed as a full difference in years, months and days — not just rounded years.
Is this tool free?
Yes, this tool is completely free and requires no registration.
Is my data saved?
No. All calculations happen in your browser only — no data is sent to any server.