Age Calculator
Calculate your exact age from your birth date, including days until your next birthday.
Current age（Today）
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Days until next birthday
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How to use
- 1
Enter your birth date
Enter your date of birth.
- 2
Auto calculation
Your exact age as of today is shown automatically.
- 3
Check your next birthday
See how many days until your next birthday and your age then.
Features
- Calculates exact age as of today
- Shows days until your next birthday
- Handles the birthday itself correctly
- Safe calculation entirely in your browser
Use cases
Fill out forms
Confirm your exact age as of today when completing documents.
Plan birthdays
Count the days to the next birthday for gifts and events.
Verify age
Quickly check your age for services with age restrictions.
Details
The age calculator computes your exact age as of today from your date of birth. Handy for forms, documents and age verification.
Exact age counts 0 at birth and adds one year on each birthday. This tool follows that rule, incrementing correctly on the birthday itself.
It also shows the number of days until your next birthday and the age you will turn then. Great for planning gifts and events.
FAQ
How is exact age counted?
Age starts at 0 at birth and increases by one on each birthday. On the birthday itself, you turn the new age.
How is February 29 handled?
In non-leap years, February 28 is treated as the birthday for accurate calculation.
Can I change the reference date?
The current version calculates based on today.
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All processing happens in your browser. Your files are never uploaded.