INTERGROWTH-21st Newborn Growth Charts
Data source: INTERGROWTH-21st (24 weeks–42 weeks + 6 days at birth)
Explore the curves or add measurements to plot your point on the chart.
How to read this chart
Range and measurements
INTERGROWTH-21st · 24 weeks–42 weeks + 6 days at birth. Weight in kilograms and length in centimeters, with separate curves for boys and girls.
Use gestational age and measurements at birth; this chart does not show postnatal growth.
What a percentile means
P50 is the median: approximately half of the reference group has a smaller measurement and half has a larger one. P10 means approximately 10% has a smaller measurement at the same age and sex.
Add a measurement
Browse the curves without entering data. To add your point, select the sex, open “Add measurements,” and enter the dates and measurements. The red point represents the measurement; use the controls to switch between weight and height or length.
Source and interpretation
A single percentile is not a diagnosis or a growth target. Interpret measurements alongside growth over time and clinical context.
View the INTERGROWTH-21st reference