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Age calculator
Age
Birthday in, precise age out. Also total days lived.
Runs in your browser. Numbers stay on this device — nothing is uploaded to BrowserSpaces for processing.
Y/M/D split
Calendar-accurate age.
Custom “as of”
Age on any date.
Total days
Days since birth.
Use the calculator
Years
31
Months
1
Days
28
Total days
11381
How it works
How age is counted
We walk calendar months and days carefully so month lengths and leap days are respected.
Three steps
- 1
Birth date
Enter DOB.
- 2
As-of date
Defaults to today.
- 3
Read age
Y/M/D and total days.