Age Calculator
Work out an exact age in years, months and days, with total days, total weeks and the next birthday.
1 min read
Runs in your browser — your text and files never leave your device.
Defaults to today.
Months and days are counted on the calendar, the way people say their age — not as an average month length.
Enter a date of birth and the date you want to measure to — today by default — and get the age the way a person would say it, plus the raw day count.
How to use it
- Choose the date of birth.
- Leave the second date as today, or pick another date.
- Press Calculate age.
Good to know
- Months and days are counted on the calendar, so the answer matches how people state their age.
- Dates are handled in UTC, so a result never shifts because of your time zone or a daylight-saving change.
Related tools: Date Calculator · Time Zone Converter
Frequently asked questions
Why is the total days figure different from years × 365?
Leap years add a day every four years and months have different lengths, so the exact day count is the honest number.
Can I use a future date?
Yes — pick a date after the birth date and the calculator gives the age on that day.