Average Weight for 3-Year-Old Boys: WHO Growth Standards

According to the World Health Organization (WHO) Child Growth Standards, the median weight for a 3-year-old boy is approximately 14.8 kg (32.6 lb). However, this is a population median—individual weights vary widely within the normal range.

Normal Range

The WHO weight-for-age chart for boys aged 36 months shows:

• 3rd percentile: ~12.2 kg (26.9 lb)
• 15th percentile: ~13.3 kg (29.3 lb)
• Median (50th): ~14.8 kg (32.6 lb)
• 85th percentile: ~16.7 kg (36.8 lb)
• 97th percentile: ~18.7 kg (41.2 lb)

Interpretation

• Weight between the 3rd and 97th percentiles is generally considered normal.
• Tracking growth trajectory over time is more informative than a single measurement.
• Height, BMI-for-age, and clinical context (nutrition, activity, medical history) are essential for assessment.

When to Seek Guidance

Consult a pediatrician if your child's weight crosses percentiles rapidly, falls below the 3rd or above the 97th percentile, or if you have concerns about appetite, growth, or development.