Height Chart for 13-Week-Old Boys
Selected recumbent length percentiles for boys at 13 weeks, reported in centimeters and feet-inches from the cited official reference table.
WHO percentile table
| Percentile | Metric | Feet-inches |
|---|---|---|
| 3rd | 57.6 cm | 1 ft 10.7 in |
| 5th | 58.0 cm | 1 ft 10.8 in |
| 10th | 58.8 cm | 1 ft 11.1 in |
| 25th | 60.0 cm | 1 ft 11.6 in |
| 50th | 61.4 cm | 2 ft 0.2 in |
| 75th | 62.8 cm | 2 ft 0.7 in |
| 90th | 64.0 cm | 2 ft 1.2 in |
| 95th | 64.8 cm | 2 ft 1.5 in |
| 97th | 65.2 cm | 2 ft 1.7 in |
What these numbers imply
The figures below are not published directly by the WHO. Each one is calculated from the official length-for-age and weight-for-age tables so that this page answers questions the raw dataset leaves open. Values differ for every age and sex.
| Measure | Value | How it was derived |
|---|---|---|
| Growth since birth | +11.5 cm | The 50th percentile at birth is 49.9 cm; at this age it is 61.4 cm. |
| Spread between 3rd and 97th percentile | 7.6 cm | At this age the middle 94% of boys fall between 57.6 cm and 65.2 cm. |
| Difference from girls at the same age | +1.6 cm | The 50th percentile for boys is 1.6 cm longer than the 50th percentile for girls. |
| Median weight and resulting BMI at this age | 6.4 kg · BMI 17.0 | Combining the 50th percentile of weight (6.4 kg) with the 50th percentile of length (61.4 cm) from the WHO weight-for-age and length-for-age tables. |
These are population reference statistics only. They describe how a group of infants of this age and sex is distributed, and say nothing about any individual child.
How to read this table
For this table, the percentile is a position in the cited reference distribution for children of the same sex and completed age band. The 50th percentile is the median: about half of the reference observations are lower and half are higher. A percentile is not a forecast, target, diagnosis, or measure of an individual child’s health. Measurement method and the reference chart used can change the reported position.
Measurement: WHO reports recumbent length for children under age 2; the page title follows the common height-chart search phrase.
Adjacent ages
Height predictor
This reference table does not embed the calculator. Open the homepage height predictor separately.
Data source
Dataset: WHO Child Growth Standards (2006): boys length-for-age, birth to 13 weeks. All nine displayed values come from who_boys_weeks.xlsx, row Week=13. See the official WHO dataset page.
Reference distribution only. This page does not provide medical advice, a diagnosis, or an individual height forecast.