Average Height & Weight for 11-Year-Old Boys: CDC Growth Chart Data

Per CDC 2000 Growth Charts (50th percentile, US population):

Metric	Average (50th %ile)	Normal Range (5th–95th %ile)
Height	53.1 in (135 cm)	49–57 in (124–145 cm)
Weight	87.4 lb (39.6 kg)	60–120 lb (27–54 kg)
BMI	17.8 kg/m²	14.5–22.5 kg/m²

Critical Context

• Puberty onset varies widely: Boys 9–14 yrs. Early bloomers taller/heavier; late bloomers smaller – both normal.
• BMI-for-age percentile is the screening standard, not absolute weight.
• Growth velocity (cm/yr) matters more than single point.
• Ethnic/genetic factors shift distributions.

When to Evaluate

• Height <3rd %ile or >97th %ile.
• Weight <5th %ile or >95th %ile (BMI).
• Crossing ≥2 major percentile channels.
• Delayed puberty (no testicular enlargement by 14).
• Signs of malnutrition, chronic disease, endocrine disorder.

Actionable

• Plot on CDC growth chart at each visit (paper or EHR).
• Use CDC BMI Percentile Calculator.
• Focus on nutrition, sleep, activity – not the number.

Population averages describe groups; your child's trajectory defines their health.