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WHO Stature-for-Age Growth Chart (2-5 Years)

Plot your child's standing height against WHO growth standards for ages 2-5 years. This chart transitions from recumbent length to standing stature for the toddler and preschool period.

LMS Method: Z = ((X/M)^L - 1) / (L x S)

How It Works

This calculator uses WHO growth standards for monitoring stature (standing height) in children aged 2 to 5 years (24-60 months). At age 2, the measurement method transitions from recumbent length (lying down) to standing height (upright). The WHO standards are prescriptive, based on healthy children from six countries under optimal conditions. The LMS method computes Z-scores and percentiles using daily LMS parameters.

Example Problem

A 3-year-old boy measures 96.1 cm in standing height. What is his stature-for-age percentile?

  1. Enter the child's date of birth and measurement date (36 months apart).
  2. Select 'Boy' for gender.
  3. Enter 96.1 cm for height.
  4. The calculator finds the LMS parameters for boys at 36 months and computes the Z-score.
  5. Result: approximately the 50th percentile, as 96.1 cm is near the WHO median height for boys at 3 years.

Key Concepts

Stature (standing height) is used for children 2 years and older, while recumbent length is used for children under 2. Standing height is about 0.7 cm shorter than recumbent length. Height is largely genetic — a child who is consistently at the 10th percentile but whose parents are also short is likely growing normally. Pediatricians look for changes in growth velocity and crossing of percentile lines over time.

Applications

  • Monitoring linear growth during the toddler and preschool years
  • Assessing growth in children transitioning from length to height measurement
  • Evaluating short or tall stature in the context of family history
  • Tracking growth in children with chronic conditions
  • International growth comparison using WHO standards

Common Mistakes

  • Using recumbent length instead of standing height for children over 2 — standing height should be used
  • Not accounting for the 0.7 cm difference between length and height when transitioning at age 2
  • Using this chart for children under 2 — use the WHO length-for-age chart instead
  • Comparing a child's height to adults or older children rather than age-appropriate percentiles
  • Not considering familial height patterns when interpreting percentiles

Frequently Asked Questions

What age range does this calculator cover?

This calculator covers children aged 24 to 60 months (2 to 5 years). For children under 2, use the WHO length-for-age chart which measures recumbent length.

What is the difference between stature and length?

Stature is standing height (measured upright), while length is recumbent (lying down). Standing height is about 0.7 cm shorter than recumbent length. The WHO uses length for children under 2 and stature for ages 2-5.

Should I be concerned about a short or tall child?

Height is largely genetic. A child who is consistently at the 10th percentile but whose parents are also short is likely growing normally. Pediatricians look for changes in growth velocity and crossing of percentile lines over time.

Can I enter height in inches?

Yes, you can enter the measurement in either centimeters or inches. The calculator converts inches to centimeters automatically.

Reference: WHO Child Growth Standards. World Health Organization, 2006. https://www.who.int/tools/child-growth-standards

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