Growth Chart CDC 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
90.0 %
Child Growth Percentile Calculator
Z-score (SD score)
1.28
Reference median for age
128.12
Percent of median
105.9 %
Chart used
Stature-for-age, 2 to 20 years [stature-for-age]
Reference
CDC 2000 Growth Charts
Measurement used
135.650
Interpretation
Within the typical range, at the 90th 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: CDC Stature-for-age, 2 to 20 years (boys).
  2. Reference parameters at 96.5 months: L = 0.45526751, M = 128.12371, S = 0.04512709.
  3. z = ((X/M)^L - 1)/(L*S) = ((135.6504/128.12371)^0.45526751 - 1)/(0.45526751 x 0.04512709) = 1.281552
  4. Percentile = Phi(z) x 100 = 90%.
Reference percentile curve at this agetable
percentilevalueunit
3117.5cm
5118.805cm
10120.83cm
25124.256cm
50128.124cm
75132.056cm
90135.65cm
95137.827cm
97139.25cm
Every chart these inputs supporttable
chartmeasurevaluezScorepercentile
Stature-for-age, 2 to 20 yearsheight-for-age135.651.281690

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