Age Calculator
Exact age down to the day.
Runs on your device
At a glance
- Input:
- Numbers you enter
- Processing:
- Runs locally in your browser
- Privacy:
- Your files stay on your device — nothing is uploaded to a server
About this tool
Precise chronological age for forms, visa applications and curiosity — expressed three ways plus totals in days, hours and minutes.
How to use it
- Enter the date of birth.
- Optionally set an 'as of' date other than today.
- Read exact age and next-birthday countdown.
Frequently asked questions
How is age in months and days computed?
Calendar-exact: complete years first, then complete months, then remaining days using real month lengths including leap years.
Does it handle leap-day birthdays (Feb 29)?
Yes. In non-leap years the birthday is treated as March 1 for 'next birthday' purposes, matching common legal conventions.
Is my birth date stored?
No. The calculation runs locally; nothing is sent or saved when you close the tab.