LITTLE DAYS, BIG MEMORIES
Online Baby Age Calculator
How old is your baby? Use this free online calculator to find their exact age in months, weeks and days, and plan the next little celebration. No sign-up needed.
Your baby’s dates
Birthday details
- Born on:
- Star sign:
Results update as you change the dates.
Enter a date of birth to see your baby’s age.
Your baby is
- Age in months
- Age in weeks
- Days since birth
- Hours
- Minutes
- Seconds
Years and months follow calendar months, not fixed 30-day or 4-week periods.
Converted from whole calendar days, using 24 hours per day. These are not exact elapsed times; no birth time was entered.
Next little celebrations
Next month milestone
Next birthday
100 days old
Your baby’s month-by-month dates
A little calendar for your growing baby.
| Age | Date | Milestone |
|---|---|---|
| 1 month | ||
| 2 months | ||
| 3 months | ||
| 4 months | ||
| 5 months | ||
| 6 months |
Each monthly anniversary follows the birth date. If that date is missing, we use the last day of the month.
MAKE IT A MEMORY
Keep their age with the memory
Add the date and your baby’s age to existing photos with BabyMoment. Each photo uses its own capture date.
Captions to share
Copy a short caption for a social post or a photo description.
Age on
Common questions
How old is my baby in months?
Count full calendar months from the birthday, then the remaining days. A baby born on July 8 is 3 months old on October 8. This calculator works for newborns, infants and older children, and can show age on today or another date. For a birthday at the end of a month, a month without that date uses its last day. For example, a child born on January 31 reaches one month on February 28 in a non-leap year.
Baby age in weeks vs months
Four weeks is 28 days. Calendar months have 28–31 days, so dividing weeks by four does not give an exact calendar month age. Enter the birth date to see both month age and week age side by side.
Can I calculate age on the day a photo was taken?
Set the calculation date to the photo’s capture date to see your baby’s age on the day it was taken. In the photo tool, BabyMoment calculates the age separately for each photo.
Can I use this as an age calculator for my child?
Enter your child's date of birth to see their age in years, months and days, plus total months, weeks and days. It works for babies and older children, and can also show their age on a future birthday or another important date.