Age Calculator
Calculate exact age in years, months and days from a date of birth, plus the total number of days lived and the next birthday countdown.
How to use the Age Calculator
Enter your date of birth.
Optionally change the 'as of' date — it defaults to today.
The calculator shows your exact age in years, months and days, total days lived, and a countdown to your next birthday.
Frequently Asked Questions
Frequently asked questions about the Age Calculator
Does the calculator account for leap years?+
Yes. Age is calculated from real calendar dates, so leap years are automatically handled correctly.
Can I calculate age as of a future or past date?+
Yes, change the 'as of' date to any date you like — useful for calculating age at a specific event, such as a wedding or graduation.
Why does my age in months look different from what I expected?+
Months are calculated from actual calendar dates, so a partial month before your next 'day of month' anniversary isn't rounded up — e.g. 5 months and 29 days stays as 5 months, not 6.