Growth Percentile Chart

Ages 0–60 months (birth to 5 years). Enter weight, height, or both; each is charted separately.

This chart is built on the WHO Child Growth Standards, the international reference for how healthy children grow from birth to 5 years. Each standard is stored as a set of LMS parameters (skewness L, median M, and coefficient of variation S) for every age, separately for boys and girls.

• Percentile bands: the shaded curves are the 3rd, 15th, 50th, 85th, and 97th percentiles. A value on the 50th line is the median; roughly half of healthy children fall above it and half below.
• Your child's percentile is computed from the LMS formula. A z-score is found with z = ((X/M)^L − 1) / (L·S), then converted to a percentile with the normal distribution — so a "60th percentile" means your child is larger than about 60% of children the same age and sex.
• Tracking over time: every measurement is saved in your browser with localStorage, so the trend line persists between visits on this device. Nothing is uploaded.
• Units: enter metric (kg, cm) or imperial (lb, in); values are converted before charting.

This tool is for general information only and is not medical advice. A child's own growth trend matters more than a single point; discuss any concerns with your pediatrician.