3 years

36 Month Old Baby Development

Congratulations! Age 3 — no longer a baby, now a little child. Character foundation is laid!

12.0 - 19.0 kgWEIGHT
92 - 106 cmLENGTH
48 - 54 cmHEAD SIZE

Ranges cover most babies this age. To see where your baby sits, use the percentile calculator.

What can a 36 month old do?

  • 1000+ words
  • Full sentences and simple dialogue
  • Recognizes triangle, circle, square
  • Stands on one foot for seconds
  • Uses scissors safely (supervised)
  • Puts on large clothing items
  • 1-10 by rote, 1-3 meaningfully

Feeding

  • Close to adult meals — still low salt/sugar
  • Daily milk 500 ml + extra dairy
  • Protein: 1 g/kg body weight
  • Variety measured in colors, not calories
  • Water 1200-1500 ml/day
  • Family meal rituals become lasting habits

Sleep

Sleeps 10-13 hours; naps no longer common.

Tips for you

  • Age 3 checkup + vaccine review (DTaP and MMR boosters are usually due at 4-6 years)
  • Eye exam — amblyopia screening
  • Pre-school registration begins
  • Emotion training — calm corner, breathing exercises
  • Respect their uniqueness
  • Celebrate yourself — you completed 3 years!
Tip of the month: Preserve these 3 years with a photo/video compilation.

Frequently asked questions

How much should a 36 month old weigh?

A typical weight range for a 36 month old is 12.0 - 19.0 kg, with length around 92 - 106 cm and head circumference around 48 - 54 cm. Following their own growth curve matters more than any single measurement.

How much does a 36 month old sleep?

Sleeps 10-13 hours; naps no longer common.

What should a 36 month old be doing?

1000+ words. Full sentences and simple dialogue. Recognizes triangle, circle, square. Stands on one foot for seconds. Every baby develops at their own pace, and differences of a few weeks are normal.

Every baby develops at their own pace. This is general guidance; talk to your pediatrician about any concerns.

Baby development by month