Age Calculator
Inputs
Birth date
Birth time (optional)
As of (reference)
Time
About the Age Calculator
Enter a birth date (and time, if you like) and an “as of” date. The tool shows precise age in calendar years/months/days and totals in days/hours/minutes/seconds, plus your next birthday and common milestones. All calculations use your local timezone.
- Include time toggles whether the hour/minute/second affect results.
- Feb 29 policy decides which day to celebrate in non-leap years.
- Totals are floor-based (e.g., total days = floor(ms / 86400000)).
Related Tools
About this collection
Each page is built around one practical task. Enter what you need, review the result, and use the actions provided by the tool.
What to expect
- Inputs and results kept together
- Layouts that adapt to smaller screens
- Direct links for returning to a tool
- No account needed for the listed utilities
Need something else? Request a tool.