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Child Weight Percentile

Child Weight Percentile: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.

ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.

Child Weight Percentile

Age (completed months)mo
Girl (1 = yes)
Body weightkg
Weight-for-age percentile (WHO)
48.2
WHO 2006 growth standards, 0–5 yearsAge is rounded to whole monthsChild Weight Percentile: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
z-score (SDS)
-0.05
WHO median for age
9.6kg
WHO interpretation
Within normal limits

More about: Child Weight Percentile

What it calculates

The “Child Weight Percentile” calculator computes Weight-for-age percentile (WHO) from 3 parameters: age (completed months) (months), girl (1 = yes), body weight (kg).

Used by professionals and patients to assess health metrics, dosages, and risks.

Example calculation

With parameters Age (completed months) = 12 months, Girl (1 = yes) = 0, Body weight = 9.6 kg the result is 48.2 (WHO 2006 growth standards, 0–5 years).

How to use

  1. Enter age (completed months), girl (1 = yes) and body weight — each field above is adjustable with a slider.
  2. Weight-for-age percentile (WHO) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.

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