Date & Time Tools
Age Calculator
Enter any date of birth and instantly see your exact age in years, months, and days — plus total days lived, weeks, next birthday countdown, and the day of the week you were born.
Features
- Exact age in years, months, and days
- Total days, weeks, and hours lived
- Day of the week you were born
- Countdown to next birthday
- Age at any custom 'as of' date (past or future)
- Star sign and birth stone info
- Works for any date from 1900 onwards
- No account, browser-only
How to use it
- Enter the date of birth using the date picker.
- Your exact age appears instantly.
- Change the 'As of' date to calculate age at any past or future date.
- See total days lived, birthday countdown, and more.
Use cases
- Calculating exact age for official documents
- Checking if someone meets an age requirement
- Fun age statistics (days, hours) for birthdays
- Age verification for contests or eligibility
Limitations
- Browser processing depends on available device memory for very large inputs.
- Tool-specific limits based on file format or browser support are noted on each tool page.
Related tools
Date Calculator
Calculate the number of days between two dates, or add/subtract days from any date. Handles leap years, weekends, and business days — browser-only.
Use toolCountdown Timer
Count down the exact days, hours, minutes, and seconds until any future date or event. Live countdown, shareable link — browser-only.
Use toolDay of the Week
Find what day of the week any date falls on — past, present, or future. Works for any date from year 1 to 9999 — browser-only.
Use toolTime Zone Converter
Convert time between any world time zones. Supports all IANA zones with DST awareness. Find the best meeting time — browser-based, free.
Use toolFrequently asked
Does the age calculator handle leap year birthdays?
Yes. Feb 29 birthdays are handled correctly — on non-leap years the birthday is counted as March 1.
Can I calculate age at a future date?
Yes. Change the 'As of' date to any future date and the age at that date is shown.