Average weight of a 3-year-old in kg
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Normal weight of 2 years old in kg!
Weight according to age in kg
Children's weight
"How much should my child weigh?" is a common question for parents. Our children are weighed regularly as babies, but as children grow and develop at different rates it's not always easy to tell if they are a healthy weight.
How to check your child is a healthy weight
For children and young people aged 2 to 18, you can check their weight by working out their body mass index (BMI) using the NHS BMI calculator.
A child's BMI tells us if their weight is right for their height, and the result is given as a centile (or percentile).
For example, a healthy weight result is between the 3rd and 91st centile.
The BMI calculator takes into account age and sex, as well as height and weight.
If you are concerned about your child's weight or growth, contact a GP or school nurse.
Use the NHS BMI calculator
School height and weight checks
Children are weighed and measured at school in Reception and Year 6 as part of the National Child Measurement Programme (NCMP).
Their height and weight are measured and used to calculate their
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