Birthday Calculator
Find your exact age in years, months and days, the day of the week you were born, and days until your next birthday — free, fast and private.
Enter your date of birth to see your age and next birthday.
How to use Birthday Calculator
- Enter your date of birth.
- Click Calculate.
- See your exact age, the weekday you were born on, and the countdown to your next birthday.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
Is this birthday calculator free?
Yes, it is free with no sign-up.
How is my age calculated?
From your birth date to today, counting full years, then remaining months and days.
Does it count leap years correctly?
Yes — the calculation uses real calendar dates, so leap years are handled automatically.
Can I calculate someone else's age?
Yes. Enter any date of birth — for a child, a parent, a celebrity, anyone.