Newborn Age Calculator | Track Baby Age in Days, Weeks & Months

Birth Year

Birth Month

Birth Day

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📊 Your Results

📖 How It Works

Select your baby's birth date from the dropdown menus. The calculator uses the exact date to compute precise age measurements.

We calculate chronological age in years, months, weeks, days, and hours — giving you a complete picture of your baby's age since birth.

Compare your baby's age against key developmental milestones — from first smile to first birthday — to track their growth journey.

Use the results alongside pediatrician growth charts to ensure your baby is meeting age-appropriate developmental targets.

Key developmental milestones from birth through the first year. Use the calculator above to see where your baby is on their journey.

Age	Days	Milestone
Birth	0 days	🎉 Welcome to the world!
1 Week	7 days	👶 Umbilical cord stump typically falls off
2 Weeks	14 days	👀 Baby can focus on faces 8-12 inches away
1 Month	30 days	📅 First pediatrician checkup
2 Months	60 days	😊 First social smile!
3 Months	90 days	🪀 Reaching for toys and grasping
4 Months	120 days	🔄 Rolling over from tummy to back
5 Months	150 days	🪑 Sitting with support
6 Months	180 days	🍚 Starting solid foods
7 Months	210 days	🐒 Crawling begins
8 Months	240 days	🧩 Pincer grasp develops
9 Months	270 days	🧍 Pulling to stand
10 Months	300 days	👏 Clapping and waving
11 Months	330 days	🚶 Cruising along furniture
1 Year	365 days	🎂 First birthday!

Knowing your baby's exact age helps you track developmental milestones and understand what to expect at each stage of growth.

Doctors track baby growth by exact age in weeks and months. Our calculator gives you precise data for pediatrician appointments.

Feeding amounts and frequencies change rapidly in the first year. Knowing your baby's exact age helps you follow age-appropriate feeding guidelines.

Vaccinations are scheduled by exact age. Use our calculator to track when your baby is due for their next immunization.