Calculate Your Age in Days, Weeks and Months
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The short answer
Enter a date of birth to see the same age in other units: total months, total weeks and total days, along with the weekday you were born and the days until your next birthday. It is a fun way to see a big number, and useful for a baby's age in months.
Change this to an exam's cut-off date to check eligibility.
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How to: Calculate Your Age in Days, Weeks and Months
- 1Enter the date of birth.
- 2Keep the 'age on' date as today.
- 3Read the totals for months, weeks and days.
- 4Check the weekday of birth in the details below.
At a glance
- Units
- Years, months, days, total months, total weeks, total days
- Weekday
- Shows the day of the week of the birth
- Babies
- Total months is handy for vaccination or growth charts
Frequently asked questions
Why do the months differ from 12 times the years?
Total months counts every full month since birth, so 25 years and 3 months shows as 303 months. The years and months line is the age as people say it.
Can I enter a date in the future?
You cannot use a date of birth in the future. The 'age on' date can be in the future, which shows how old someone will be on that day.