Average Weight & Height for a 4-Year-Old
CDC growth chart data — 50th percentile (average) values for boys and girls
Weight
Boys: —
Girls: —
Height
Boys: —
Girls: —
BMI
Boys: —
Girls: —
Weight Percentile Chart — 4-Year-Old
Weight at 50th percentile (average) is shown highlighted. All values from CDC growth chart data.
Loading data...
Height Percentile Chart — 4-Year-Old
Height at 50th percentile (average) is shown highlighted.
Loading data...
BMI-for-Age Percentile Chart — 4-Year-Old
BMI at 50th percentile (average) is shown highlighted. BMI between 5th and 85th percentile is considered healthy weight.
Loading data...
Get Your Child's Exact Percentile
These tables show population averages. For a personalized result, enter your child's measurements in our calculator.
Calculate Growth Percentile →Growth at 4 Years
Four-year-olds continue the steady growth pattern of early childhood. The average 4-year-old boy weighs about 16.3 kg (35.9 lb) and stands 102.5 cm (40.4 in) tall. Girls average about 15.9 kg (35 lb) and 101 cm (39.8 in). Children this age gain about 2 kg per year and grow about 6 cm per year.
Pre-Kindergarten Size
Parents often wonder if their 4-year-old is the "right" size for starting school. There's enormous normal variation in size at this age. A 4-year-old boy at the 3rd percentile might weigh 12.7 kg (28 lb) and stand 94.5 cm (37.2 in), while one at the 97th might weigh 20.9 kg (46 lb) and stand 110 cm (43.3 in) — both are perfectly normal.
Physical Activity and Growth
Four-year-olds need lots of active play — at least 3 hours of physical activity per day, including structured and unstructured movement. Regular exercise supports healthy bone development, muscle growth, and helps maintain a healthy weight. Activities like climbing, jumping, throwing, and pedaling all build coordination.
Monitoring BMI
The natural BMI decline ("adiposity rebound") that began around age 2 typically reaches its lowest point between ages 4 and 6. An early adiposity rebound (before age 4) is associated with higher risk of later obesity. Your pediatrician tracks this — you can also check with our BMI-for-age calculator.
Frequently Asked Questions
The average 4-year-old boy weighs about 16.3 kg (35.9 lb), and the average girl weighs about 15.9 kg (35 lb). Normal weight ranges from about 12.7–21 kg (28–46 lb) between the 3rd and 97th percentiles.
Average height at 4 years is about 102.5 cm (40.4 in) for boys and 101 cm (39.8 in) for girls. The normal range spans from about 95–110 cm (37.4–43.3 in).
A 4-year-old with a BMI above the 85th percentile is considered overweight, and above the 95th percentile is obese. However, BMI in children must be interpreted in context — a very muscular or tall child might have a higher BMI without excess body fat. Your pediatrician can assess body composition directly.
You can use our height predictor, which uses the Khamis-Roche method along with both parents' heights for a more accurate estimate. Generally, boys reach about 57% and girls about 66% of their adult height by age 4.
Disclaimer: Data from the CDC Growth Charts. These are population reference values, not targets. Every child grows at their own pace. This is not medical advice — always consult your pediatrician with specific concerns about your child's growth.