Age in Days Calculator
Calculate your exact age in days, weeks, months and hours from your date of birth. Shows your next birthday countdown too.
How to use
Enter your date of birth
Select your date of birth to see your exact age broken down in multiple units — days, weeks, months and hours. Counts are precise to today's date.
Next birthday countdown
The tool automatically calculates how many days until your next birthday and which day of the week it falls on. A great way to plan ahead or share with friends and family.
Frequently asked questions
Is the Age in Days free to use?
Yes, the Age in Days is completely free. There is no sign-up, no account required, and no limit on how often you can use it.
Does the Age in Days use my time zone?
Yes, the Age in Days uses your device's local time zone by default. You can also work with dates explicitly without time zone effects where applicable.
What devices does the Age in Days work on?
The Age in Days works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.