Age Calculator
Calculate completed years and total elapsed days between a birth date and reference date.
Result
How to use
Enter both dates as YYYY-MM-DD, or use today for the reference.
Run the tool to calculate or transform the input.
Copy the result or save it as a text file.
FAQ
What rules does this tool use?
Age increases when the birth month and day are reached. For a February 29 birth, non-leap years reach that point on March 1.
What are the limits?
Dates are calendar dates without time zones. The reference date cannot precede birth.
Are my inputs uploaded?
Tool inputs are processed in your browser. Advertising makes separate requests as described in the privacy policy.