Track every day. Boldly.
Find out exactly how old your baby is — years, months, weeks, and days. Then see what's coming next.
Calculate now →Enter the birthday
We'll work out their exact age — down to the day.
12 Zodiac Signs
Tap a sign to see what your little one might be like.
See all 12 zodiac signs →Three steps
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See the exact age, plus what's next.
Explore the guides
Zodiac and milestone guides for every stage.
Questions parents ask
How do I convert my baby's age from weeks to months?
A month is longer than 4 weeks, so divide the weeks by 4.345. That means 12 weeks is not 3 months — it's about 2 months and 3 weeks. Want the exact number? Enter the birthday in the calculator and we'll do the math for you.
Try the calculator →When should I stop counting my baby's age in weeks?
Most parents count in weeks for the first 2 to 3 months, then switch to months. Doctors do the same: early checkups and shots are set by weeks, then by months until age 2. After the second birthday, years are fine.
What is corrected age for premature babies?
Corrected age is your baby's age minus the weeks they were born early. A 10-week-old born 4 weeks early has a corrected age of 6 weeks. Use it for milestones until about age 2 — but shots still follow the real birth date.
How old is my baby today?
Enter the birthday in the calculator to see your baby's exact age in years, months, weeks, and days. You'll also get their zodiac sign and the next milestone. It counts from the real dates, so the answer is always today's.
Calculate now →