What Is This Tool?
The Age Calculator finds exact age in years, months and days between a birth date and another date, plus total days.
What Can You Do With It?
Find your exact age today. Check age on a specific date for forms or eligibility. Count days between two dates.
How Does It Work?
The tool counts whole years and months using anniversaries of the birth date (handling short months correctly), then counts the remaining days. Total days uses calendar dates without time zones.
Key Benefits
Handles leap years and month lengths. Shows total days too.
Limitations and Important Notes
The birth date cannot be after the calculation date. Time of birth is not considered.
Privacy and Security
This tool runs entirely in your web browser. Your input and results are processed on your device and are not uploaded to Usekit servers.
Real-World Example
Birth date 2000-01-15, as of 2026-10-27 → 26 years, 9 months, 12 days.
Frequently Asked Questions
How are leap-day birthdays handled?
In non-leap years, the anniversary is treated as the last day of February.
Can I calculate age at a future date?
Yes, choose any future “as of” date.
Does time zone matter?
No. Only calendar dates are used.
Related Tools
How to use this tool
- Choose the date of birth.
- Choose the “calculate as of” date.
- Calculate and read years, months, days and total days.