Infant Height Weight Percentile Calculator

Not needed for the weight-for-length and weight-for-stature charts. The charts run to 240 months (20 years).
Recumbent length under 2 years, standing height from 2 years. Centimetres, or inches in US units.
Kilograms, or pounds in US units.
Occipitofrontal circumference in centimetres, or inches in US units.
Only needed if you want a BMI-for-age percentile without entering height and weight.
Percentile
3.0 %
Child Growth Percentile Calculator
Z-score (SD score)
-1.89
Reference median for age
7.48
Percent of median
79.7 %
Chart used
Weight-for-age, 0 to 1856 days [weight-for-age]
Reference
WHO Child Growth Standards (2006)
Measurement used
5.954
Interpretation
Within the typical range, at the 3rd percentile.
Worked out from CDC 2000 Growth Charts - percentile data files with LMS parameters and 5 other sources.
A growth percentile is a screening number, not a diagnosis. Serial measurements plotted over time, taken with calibrated equipment, are what a clinician interprets. Discuss any concern with your paediatric provider.

How this is worked out

4 steps
  1. Chart: WHO Weight-for-age, 0 to 1856 days (girls).
  2. Reference parameters at 197.8438 days: L = -0.09024375, M = 7.475234, S = 0.12187156.
  3. z = ((X/M)^L - 1)/(L*S) = ((5.9543/7.475234)^-0.09024375 - 1)/(-0.09024375 x 0.12187156) = -1.8859
  4. Percentile = Phi(z) x 100 = 2.97%.
Reference percentile curve at this agetable
percentilevalueunit
35.958kg
56.128kg
106.401kg
256.887kg
507.475kg
758.118kg
908.749kg
959.151kg
979.424kg
Every chart these inputs supporttable
chartmeasurevaluezScorepercentile
Weight-for-age, 0 to 1856 daysweight-for-age5.954-1.88592.97

Results are general information, not financial, tax, legal, medical or engineering advice.