Growth Chart Calculator

Plot your baby's weight and height on WHO growth charts

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About This Tool

This tool uses the World Health Organization (WHO) Child Growth Standards, which are recommended by the Health Promotion Board (HPB) Singapore for monitoring child growth.

Medical Disclaimer: This tool is for educational and informational purposes only. It does not provide medical advice, diagnosis, or treatment. Results are estimates only. Always consult a qualified healthcare professional for medical decisions. In an emergency, call 995 (Singapore) immediately.

WHO Weight Reference: Boys & Girls (0–12 months)

Median (50th percentile) weight in kg by age and sex. Source: WHO Child Growth Standards.

Age	Boys (kg)	Girls (kg)	Boy Height (cm)	Girl Height (cm)
Birth	3.3	3.2	49.9	49.1
1 month	4.5	4.2	54.7	53.7
2 months	5.6	5.1	58.4	57.1
3 months	6.4	5.8	61.4	59.8
4 months	7.0	6.4	63.9	62.1
5 months	7.5	6.9	65.9	64.0
6 months	7.9	7.3	67.6	65.7
9 months	8.9	8.2	72.3	70.1
12 months	9.6	8.9	75.7	74.0

Understanding Growth Percentiles

97th+ percentile (Largest 3%)

Very large for age. Usually healthy but may warrant a check if weight is gaining very rapidly.

85th–97th (Above average)

Larger than most - Typically healthy. Consistency is key.

15th–85th (Normal range)

Most babies fall here. Growth within this range is considered typical.

3rd–15th (Smaller than average)

Smaller but may be normal - Especially if parents are petite. Paediatrician will assess trends.

Below 3rd (Significantly small)

Discuss with your paediatrician. May need further investigation, especially if dropping percentiles.

The trend matters more than a single number. A baby consistently at the 10th percentile who is growing steadily is healthy. A baby dropping from the 60th to the 20th percentile across a few months warrants investigation. Track growth over time with the Immunization Tracker and visit the Baby Hub →