Calculate Exact Age by Date of Birth
Chronological Age Calculator helps you calculate exact age from a date of birth. It shows your age in years, months, and days, plus total months, weeks, days, hours, minutes, and seconds.
Enter birth date and optional name
If provided, the result title will use this name.
Default value is today.
This means that you have been on planet Earth for:
What is a Chronological Age Calculator?
A chronological age calculator is an online tool that measures exact age from a birth date to a selected date, usually today. It uses real calendar rules to return a precise result in years, months, and days.
How to use this age calculator?
Enter the date of birth, optionally type a name, and click Calculate age. You can also set a custom "calculate age on date" value to check age at a past or future date.
What does the output of this age calculator show?
The main output shows the exact chronological age in years, months, and days. Below that, this calculator also shows equivalent totals in months and days, weeks and days, days, hours, minutes, and seconds.
Why exact age can vary across calculators
Some age tools use simplified math based on fixed month lengths. This tool uses calendar-aware calculation with leap-year support to provide accurate age intervals.
Frequently Asked Questions (FAQ)
Is this chronological age calculator accurate?
Yes. It calculates age using actual calendar dates and leap years.
Can I calculate age for a date different from today?
Yes. Use the optional target date field to calculate exact age on any selected date.
Does this tool include total age in seconds?
Yes. It includes totals in seconds, minutes, hours, days, weeks, and months.
Send me your feedback about this Chronological Age Calculator and let me know what extra outputs you need, such as next birthday countdown, zodiac data, or age milestones.
You can contribute with fixes and improvements on Github: Github >> Chronological Age Calculator. Pull requests are welcome.
