Height Calculator

Boys Growth Chart

Interactive P3–P97 percentile curves for boys, drawn from real CDC and WHO data. Switch references, then plot any age and height to see exactly where it lands.

Please note: these are educational estimates based on published growth references, not medical advice. If you have concerns about a child's growth, consult a pediatrician.

Boys growth chart

Curves computed from the published LMS tables — CDC 2000 (ages 2–20) and WHO Child Growth Standards (birth–5 years). Nothing estimated.

60 80 100 120 140 160 180 200 220 2 4 6 8 10 12 14 16 18 20 P3 P10 P25 P50 P75 P90 P97 Age (years) Height (cm) 40 50 60 70 80 90 100 110 120 130 0 1 2 3 4 5 P3 P10 P25 P50 P75 P90 P97 Age (years) Length / height (cm)

Plot your point

Enter age and height to drop a dot on the active chart.

Age
y m
Height
cm

How to read this chart

  • Find the age on the bottom axis and the height on the left axis; where they meet is the plotted point.
  • Curves P3–P97 are percentiles. A point on P25 means taller than about 25% of boys that age in the reference.
  • The bold P50 curve is the median — half of the reference population falls above it, half below.
  • Tracking matters most: a child following their own curve steadily over time is the reassuring pattern, wherever that curve sits.

About the two references

The CDC tab shows stature-for-age for ages 2–20, the reference used across the US. The WHO tab shows length/height-for-age from birth to 5 years — recumbent length under 24 months, standing height from 24 months — the international standard. Curves stop exactly where each reference's published tables stop; we never extend them.

Prefer numbers to pictures? Get the exact percentile and z-score in the boys height percentile calculator, or estimate adult height with the child height predictor.

FAQ

Boys growth chart FAQs

How do I read the percentile curves?

Each curve (P3 to P97) traces one percentile across ages. Find the child's age on the bottom axis, go up to their height, and see which curve the point sits on or between — that is their approximate percentile. The bold emerald P50 curve is the median.

Which chart should I look at — CDC or WHO?

The CDC tab covers ages 2–20 (standing height, the US reference); the WHO tab covers birth–5 years (length lying down under 2, standing height from 2). Use the tab that matches the child's age and the reference your pediatrician uses.

Are these the real published curves?

Yes. Every curve is computed from the official published LMS tables — CDC 2000 stature-for-age and the WHO Child Growth Standards — with the same inverse-LMS transform the charts are built from. Nothing is smoothed, estimated, or drawn by hand.

What does it mean if the plotted point is far from the middle?

Being near P3 or P97 just means the measurement is uncommon in the reference population — it is not a diagnosis. What matters most is whether a child tracks along their own curve over time. This chart is educational; discuss concerns with a pediatrician.

More height calculators

Boys Height Calculator

Quick height check for boys against CDC growth references.

Girls Height Calculator

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Baby Height Calculator

Length-for-age percentiles for babies 0–24 months (WHO).

Boys Height Percentile Calculator

Exact percentile + z-score with CDC / WHO / UK-WHO switcher.

Girls Height Percentile Calculator

Exact percentile + z-score with CDC / WHO / UK-WHO switcher.

Child Height Predictor

Predict adult height from parents' heights, with honest range.

Girls Growth Chart

Interactive CDC/WHO percentile curves — plot your own point.

UK Boys Height Percentile

UK-WHO chart percentiles for ages 2 weeks–4 years.

Based on published growth references

Every percentile on this site is computed from official LMS tables — the same references pediatricians use. We never estimate outside the ages each reference covers.

  • CDC (US)

    CDC 2000 Growth Charts, stature-for-age (National Center for Health Statistics)

    Official source

  • WHO

    WHO Child Growth Standards, length/height-for-age (WHO Multicentre Growth Reference Study, 2006)

    Official source

  • UK-WHO

    UK-WHO growth charts (RCPCH): ages 2 weeks-4 years follow the WHO Child Growth Standards

    Official source