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This calculator is a tool to help health professionals assess healthy growth and development in children. It is not a full assessment. All results need to be discussed with a health professional who knows the child and their family.

Disclaimer

This calculator is a tool to help health professionals assess healthy growth and development in children. It is not a full assessment. All results need to be discussed with a health professional who knows you and your child.

Visit your GP or local health professional if you want to know more about your child's growth or development.

These results suggest the child measured is

Below a healthy weight A healthy weight Above a healthy weight Well above a healthy weight

based on an year old at kg and cm BMI-for-age is at the percentile.

Weight scale Marker
Below a healthy weight Healthy weight Above a healthy weight

BMI for age and sex chart

BMI graph for boys BMI graph for girls
Result
Below a healthy weight: under 5th percentile. Healthy weight: 5th percentile to 85th percentile. Above a healthy weight: 85th percentile to 95th percentile. Well above a healthy weight: 95th percentile and above.

Date of measurement

Supporting information

For parents and carers

This calculator helps health professionals see how they are growing, and there are many other factors that also affect a child’s health and development. It’s best to visit your GP or healthcare provider to discuss your child’s health.

A three-step brief intervention model to support clinicians​​

Assessing children's growth is important for providing quality care.

The three-step Ask, Advise, Help (AAH) brief intervention model can support clinicians to deliver routine growth assessments for children. It can also help to track development, identify risks, address health concerns, and ensure timely support .

Tips

  • Always practice good clinical judgement. If you think a growth assessment or conversation might be too stressful for a child or their family, it’s okay to reconsider doing it.​
  • Talk in a positive and encouraging way.
  • When giving advice, be supportive and kind, without being judgmental.​
Current as at: Monday 17 March 2025
Contact page owner: Centre for Population Health