Count full years
Start with the most recent birthday on or before the date you chose.
Free · private · calendar-accurate
Age Calculate Online
Calculate your exact age in years, months, and days.
Your exact age
Your result will appear here.
Enter your birth date to see your age, total days, and next birthday.
Total days
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Next birthday
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How to calculate your exact age
Age is the complete calendar time between two dates. It is not an estimate based on 365 days per year or 30 days per month.
Count full months
Continue through real calendar months, including their different lengths.
Count remaining days
Use the calendar day difference for the days left after full months.
Example: January 15, 2001 to April 20, 2026 is 25 years, 3 months, and 5 days.
Any date, any direction
Calculate age on a specific date
Choose a past date to check your age at a point in time, or a future date to plan for an application, event, or milestone. The same calendar method applies to both.
The reference date cannot be earlier than the date of birth. If it is, the calculator explains the issue and clears the previous result.
Calendar edge case
February 29 birthdays
When the year has no February 29, choose which date counts as the birthday for this calculation.
The chosen rule is for general date calculations. Laws and institutions may use a different rule.
Your dates stay yours
Private by design
Your dates are used in this browser to calculate your age. They are not uploaded, added to the URL, or saved after you leave.
Analytics counts calculator actions without receiving birth dates, age values, or the date you calculate on.
Frequently asked questions
How is age calculated in years, months, and days?
The calculator counts complete calendar years first, then complete calendar months, then the remaining days. It uses actual month lengths and does not convert every year to 365 days or every month to 30 days.
Can I calculate my age on a date in the past or future?
Yes. Choose any reference date on or after the date of birth. The calculator uses that date instead of today.
How does the calculator handle a February 29 birthday?
For a non-leap year, choose February 28 or March 1 as the birthday boundary. The selected rule appears beside the result.
Can I use this result for a legal age requirement?
This calculator is for general date calculations. Laws and organizations may define age or effective dates differently, so confirm the rule that applies to your situation.