1 year 5 mo

17 Month Old Baby Development

Running begins — a tiny athlete full of energy!

9.0 - 13.3 kgWEIGHT
75 - 86 cmLENGTH
45 - 51 cmHEAD SIZE

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

What can a 17 month old do?

  • Light running (may be unsteady)
  • Squats and stands up
  • Throws a ball (no direction)
  • Vocabulary grows quickly
  • Pushes toy cars
  • Holds fork correctly
  • Points to 3+ body parts

Feeding

  • Breast milk may continue 1-2 times/day
  • Nut butters not whole nuts
  • Whole-grain bread and bulgur pilaf
  • No bargaining — offer 3-4 different foods
  • Screens off, conversation on
  • Protein daily: egg, lentil, yogurt

Sleep

Sleeps 11-14 hours; single daytime nap (1-2 hours).

Tips for you

  • Re-check home safety — they climb everywhere now
  • Outdoor = vitamin D + motor skills
  • Positive reinforcement shapes behavior
  • Potty training still too early
  • Start conversations now if a sibling is planned
  • "No" is a search for independence, not defiance
Tip of the month: Teach feeling words before numbers and colors — it's the base for empathy.

Frequently asked questions

How much should a 17 month old weigh?

A typical weight range for a 17 month old is 9.0 - 13.3 kg, with length around 75 - 86 cm and head circumference around 45 - 51 cm. Following their own growth curve matters more than any single measurement.

How much does a 17 month old sleep?

Sleeps 11-14 hours; single daytime nap (1-2 hours).

What should a 17 month old be doing?

Light running (may be unsteady). Squats and stands up. Throws a ball (no direction). Vocabulary grows quickly. 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