Results
Exact Age: –
In Months: –
In Days: –
In Hours: –
In Minutes: –
In Seconds: –
Next Birthday Countdown: –
Overview
The Age Calculator lets you quickly determine someone's age in years, months, days — even down to the hour, minute, and second. It's useful for birthdays, milestone celebrations, academic records, application forms, and trivia fun.
You can choose a custom target date if needed (e.g., calculate age on a future or past event date). The tool also shows how much time is left until the next birthday!
Formula & Methodology
Age is calculated by comparing the selected date of birth with the target date (or today by default).
- Years: Total completed calendar years
- Months: Remaining full months beyond the last birthday
- Days: Days remaining beyond the last full month
- Exact Time: Also broken down into hours, minutes, and seconds
The next birthday countdown is calculated by finding the number of days until the next occurrence of the birth month/day.
Examples
- Born: Jan 1, 2000 → Today: Jun 15, 2025 →
Age: 25 years, 5 months, 14 days - Born: Oct 25, 2010 → Target Date: May 10, 2022 →
Age: 11 years, 6 months, 15 days
Use Cases
- Birthday widget for personal websites or event invitations
- Calculating age for school, legal, or medical forms
- Comparing age between two dates (past/future)
- Social media or trivia quizzes (e.g., “how old is X today?”)
- Genealogy, horoscopes, or birth anniversary records
FAQ
What if the birthday is February 29 (leap year)?
The tool adjusts for leap years and assumes the birthday occurs on Feb 28 or Mar 1 in non-leap years, depending on conventions.
Can I use a future date?
Yes! You can select a future date to find how old someone will be on that date — useful for planning events.
What time zone is used?
All time calculations are based on your local device clock/time zone.
How is the exact age broken down?
The tool calculates the full difference in years, months, days, and also in total seconds, which is then broken into hours, minutes, and seconds.
Is this tool suitable for legal age verification?
While it's precise, legal age verification may require official documentation. Use this tool for informational purposes only.