Child Growth Centile Calculator
Use this calculator to find out your child’s growth centile using World Health Organization (WHO) growth standards. Simply enter your child’s age, gender, weight and height, and we’ll show where they sit compared with other children of the same age and sex.
Growth centiles are commonly used by healthcare professionals to monitor a child’s growth pattern over time. They can help identify whether a child is growing as expected and provide useful context when choosing products such as car seats, pushchairs and other child equipment that have height or weight limits.
Please note: this calculator is for informational purposes only and is not intended to replace medical advice.
Understanding Growth Centiles
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A centile compares your child’s measurements with those of other children of the same age and sex.
For example:
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50th centile = average compared with the reference population
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75th centile = taller or heavier than 75% of children and smaller than 25%
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25th centile = taller or heavier than 25% of children and smaller than 75%
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99th centile = among the largest children for their age
Being on a high or low centile is not necessarily a cause for concern. Children come in all shapes and sizes. Healthcare professionals are usually more interested in whether a child follows a consistent growth pattern over time rather than which centile they are on at a single point.
The World Health Organization (WHO) growth standards are widely used around the world and are based on how healthy children grow under optimal conditions.
Why is this useful?
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Understanding your child’s growth can help when:
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Checking height and weight ranges for car seats
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Choosing age-appropriate products
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Tracking growth between health visitor appointments
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Understanding how your child compares with typical growth patterns
If you have concerns about your child’s growth, weight gain or development, please speak to your GP, health visitor or paediatric healthcare professional.