Normal weight for 8 year olds (kg)

Boys, median

25.8kg

Girls, median

25.8kg
kgView this page in pounds

Most healthy 8-year-olds weigh 20 to 36 kg.

Boys: usual range is 20.7 to 35.3 kg (5th to 95th percentile)

Median 25.8
Below 5thUsual rangeAbove 95th

Girls: usual range is 20.1 to 36.2 kg (5th to 95th percentile)

Median 25.8
Below 5thUsual rangeAbove 95th
Based on CDC growth charts. Growth is judged over several visits, not one measurement.

Check your child

Pick months for babies and toddlers up to 24 months, or years for ages 2 to 20.

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For children under 2, we use World Health Organization growth charts. From age 2, we use CDC growth charts.

Weight percentiles at 8 years

These numbers come from CDC growth charts. For children under 2, we use World Health Organization growth charts.

PercentileBoysGirls
3rd20.1 kg19.5 kg
5th20.7 kg20.1 kg
10th21.6 kg21.2 kg
25th23.3 kg23.1 kg
50th25.8 kg25.8 kg
75th28.8 kg29.2 kg
90th32.5 kg33.2 kg
95th35.3 kg36.2 kg
97th37.4 kg38.5 kg

Growth chart

How weight changes with age for boys and girls, by year.

kg02040608010025101520Age (years)8 years
kg02040608010025101520Age (years)8 years

The wider shaded area shows the 5th to 95th percentile. The narrower area shows the 25th to 75th. The lines show the median for boys and for girls. See the table

  • Boys, median
  • Girls, median
  • Boys, 5th to 95th percentile
  • Boys, 25th to 75th percentile
  • Girls, 5th to 95th percentile
  • Girls, 25th to 75th percentile

What it means

In kilograms, the usual range for a 8-year-old is 20.7 to 35.3 kg for boys and 20.1 to 36.2 kg for girls (5th to 95th percentile).

For an 8-year-old, the median for boys and girls is the same: 25.8 kg.

Two growth charts. For children under 2, we use World Health Organization growth charts. From age 2, we use CDC growth charts. US doctors follow the same switch.

What's a usual range? Most healthy children are between the 5th and 95th percentiles. Many healthy children are above or below that range. Doctors look at the trend over time, not one weight.

Percentiles aren't grades. The 50th percentile is the middle: half of children weigh more and half weigh less. It isn't a target weight.

How to measure your child

  1. Weigh your child in light clothing, without shoes.
  2. Write down the weight to one decimal place, in pounds or kilograms.
  3. Use the same scale at the same time of day when you compare.

Nearby ages

4 years5 years6 years7 years8 years9 years10 years11 years12 years

Common questions

Short answers about how these calculators work.

In the US, doctors use World Health Organization growth charts from birth to 2 years and CDC growth charts from age 2. We follow the same switch.

Not from one number. A percentile shows where a child falls compared with others the same age. Your child's doctor looks at it along with height, growth over time and a checkup.

Sources

Where these numbers come from

  1. 2000 CDC growth charts for the United States (opens in a new tab) - CDC, 2000Growth charts for children 2 and older
Medical disclaimer Healthly is for general information only. It isn't medical advice and can't diagnose or treat any condition. Talk with your doctor about your own numbers. If you think you're having a medical emergency, call 911 or your local emergency number. How we get our numbers

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