👶 Your 12-Month-Old Baby

Happy first birthday! Many babies take their first steps around now.

Average weight (boy / girl)9.6 / 8.9 kg
Sleep in 24 hours11–14 h, 1–2 naps
FeedingFamily foods + milk

Development at 12 months

These are things most children (about 3 in 4) can do by this age. Babies born early may reach them later — use their corrected age.

Growth: WHO weight, length and head size

Weight (3rd–97th)Length (3rd–97th)Head (median)
Boys7.8–11.8 kg (median 9.6)71.3–80.2 cm (median 75.7)46.1 cm
Girls7.1–11.3 kg (median 8.9)69.2–78.9 cm (median 74)44.9 cm

Any steady curve within this range is normal; what matters is that your baby follows their own curve over time.

Feeding

Sleep and teeth

Vaccines due at 12 months

ScheduleAgeVaccines
IAP (India)12 monthsHepatitis A-1

Your paediatrician may group doses differently. Keep the vaccination card safe.

Tips for this month

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Baby Milestones Calculator by Age

See which developmental milestones most babies and children reach at your child's age, what comes next, and corrected age for premature babies — based on CDC milestones.
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Baby & Child Weight Percentile Calculator

Find your baby's or child's weight-for-age percentile on the WHO or CDC growth chart (birth to 20 years), with the z-score, the normal weight range for the age and corrected age for premature babies.
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Baby Vaccination Schedule Calculator (India, US, UK)

Get your baby's vaccination schedule with exact due dates from the date of birth — India (IAP 2025 and government UIP), US (AAP/CDC) or UK (NHS) — and see which vaccines are due now and next.
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Baby Food Portion Size Calculator (6–36 Months)

Find how much solid food your baby or toddler should eat: meals per day, portion size per meal, texture and amounts from each food group, from 6 months to 3 years.

Frequently asked questions

What should a 12-month-old be doing?

Most 12-month-olds: pulls up to stand and walks holding furniture; waves bye-bye; calls a parent "mama" or "dada"; drinks from a cup you hold.

How much should a 12-month-old weigh?

The WHO median is 9.6 kg for boys and 8.9 kg for girls; the normal range is wide (see the table).

How much should a 12-month-old sleep?

11–14 h in 24 hours including 1–2 naps.

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