Exact age breakdown
Calculate years, months, days, completed years, total months, and total days.
Free birthday age calculator
Calculate age quickly, then add the birthday to a reminder system so you do not need to calculate it again at the last minute.
Next birthday
18
days remaining
Free tool
Use the tool locally in your browser. Personal names, dates, and notes are not sent to analytics.
Enter a birthday and calculate the result.
An age calculator is useful when you need more than a completed-year number. It should show the exact years, months, and days, the next birthday, and how long remains until that date.
This calculator runs in your browser. Enter a date of birth, keep today as the calculation date or choose another date, and copy the result when you need it.
Use it to compare completed age, exact age, next birthday details, and leap-day behavior.
Calculate years, months, days, completed years, total months, and total days.
See the next birthday date, weekday, days remaining, and age on that birthday.
February 29 birthdays are explained clearly for non-leap years.
Dates are calculated client-side and are not sent to analytics.
Enter a date of birth, choose the calculation date, and review the result locally in your browser.
Use the DOB field for the person whose age you want to calculate.
Leave it as today or calculate age on a past date for a specific record.
Copy the age result or save the birthday to BReminder for yearly reminders.
Completed age and upcoming age answer different questions. Completed age tells you how many full years have passed. Upcoming age tells you how old the person will be on their next birthday.
The calculator also shows weekday details and total days lived where the browser date calculation can determine them reliably.
Use completed years when a form asks for current age.
Use age on next birthday when preparing milestone cards or gifts.
Use a custom calculation date when verifying an older record.
No. The calculation runs in your browser and the date is not sent to analytics.
Exact age breaks the result into years, months, and days as of the calculation date.
Yes. The calculation date defaults to today, but you can choose another date.
For non-leap years, BReminder uses February 28 for birthday reminder calculations and explains that behavior in the result.
Count down to the next birthday, see days and hours remaining, find the weekday, and calculate age on the next birthday.
Birthday TrackerTrack birthdays in one organized BReminder list with contact import, notes, relationship labels, and upcoming views.
Birthday Reminder GeneratorGenerate a simple birthday reminder plan with lead times, message ideas, and next steps for important birthdays.
Start with one list, set the right reminder timing, and give yourself room to celebrate people well.
Save birthdays in BReminder