!! IMPORTANT USER TIP (MAY 2022 update):
A recent update to the calculator requires all users to perform a refresh of the webpage by pressing CTRL SHIFT R simultaneously. This needs to be performed only once. The BMI will now display when the mouse is hovered over the grey marker tooltip for the BMI scale.
Please note:
This calculator provides a general guide to healthy weight in children and teenagers. It is not intended to be a substitute for advice from a health professional. See your GP or local health professional if you are concerned about your child’s growth or development.
It’s not always easy to tell if a child is a healthy weight for their age and height.
Children and teenagers need to grow, but they are healthiest if they stay within a certain weight range as they grow. This is called a healthy weight for their age.
How do I know if my child or teenager is healthy weight?
You can find out if a child or teenager is a healthy weight for their age using the healthy weight calculator.
Who is the healthy weight calculator for?
This calculator can be used for children and teenagers from 2 years through to 18 years of age.
If you are over 18 years, you can use an adult calculator to find out whether you are a healthy weight.
Weight category based on the result
Your results suggest the child measured is
Below a healthy weightA healthy weightAbove a healthy weightWell above a healthy weight
based on an year old at kg and cm BMI-for-age is at the percentile.
Below a
healthy weight Healthy
weight Above a
healthy weight
The results explained:
The result suggests your child is below a healthy weight for their age and height.
Low weight for height and age can occur for many reasons. If your child is below a healthy weight or not growing, take them to see your GP or other health care provider.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
Check the measurements you have entered and if you are concerned, talk to your GP or other health care provider about your child’s growth.
Keep records of your child’s height and weight, and regularly take your child to your GP or other health care provider to monitor their growth.
The result suggests your child is below a healthy weight for their age and height.
Low weight for height and age can occur for many reasons. If your child is below a healthy weight or not growing, take them to see your GP or other health care provider.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
Check the measurements you have entered and if you are concerned, talk to your GP or other health care provider about your child’s growth.
Keep records of your child’s height and weight, and regularly take your child to your GP or other health care provider to monitor their growth.
The result suggests you are below a healthy weight for your age and height.
Talk to your GP or health care provider about your weight.
Growth can change over time, so it’s important to check your height and weight every three months.
Check the measurements you have entered and if you are concerned, talk to your GP or other health care provider about your weight.
The result suggests your child is a healthy weight for their height and age.
Being a healthy weight is good news. Remember, it is important for children to eat a healthy and varied diet and to be physically active for at least an hour each day.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
The result suggests your child is a healthy weight for their age and height.
Being a healthy weight is good news. Remember, it is important for children to eat a healthy and varied diet and to be physically active for at least an hour each day.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
The result suggests you are a healthy weight for your age and height.
Being a healthy weight is good news. Remember, it is important to eat a healthy and varied diet and to be physically active for at least an hour each day.
Growth can change over time, so it’s important to check your height and weight every three months.
The result suggests your child is above a healthy weight for their height and age.
Children above a healthy weight may develop health problems in childhood, such as asthma; sleep problems; hip, knee and ankle problems; and high cholesterol or blood pressure.
Children who are above a healthy weight are also much more likely to become overweight adults, putting them at risk of health problems like heart disease, diabetes and cancer.
You can do a lot to help your whole family develop healthier eating habits, and keep them active and well.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
The result suggests your child is above a healthy weight for their height and age.
Children above a healthy weight may develop health problems in childhood, such as asthma; sleep problems; hip, knee and ankle problems; and high cholesterol or blood pressure.
Children who are above a healthy weight are also much more likely to become overweight adults, putting them at risk of health problems like heart disease, diabetes and cancer.
You can do a lot to help your whole family develop healthier eating habits, and keep them active and well.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
The result suggests you are above a healthy weight for your height and age.
This means you weigh more than is healthy for someone of your height, age and sex. Being above a healthy weight can put you at risk of poor health as an adult.
There are many easy changes you can make and there is lots of support for a healthy lifestyle available.
Growth can change over time, so it’s important to check your height and weight every three months.
The result suggests your child is well above a healthy weight for their height and age.
Children above a healthy weight may develop health problems in childhood, such as asthma; sleep problems; hip, knee and ankle problems; and high cholesterol or blood pressure.
Children who are above a healthy weight are also much more likely to become overweight adults, putting them at risk of health problems like heart disease, diabetes and cancer.
You can do a lot to help your whole family develop healthier eating habits, and keep them active and well.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
The result suggests your child is well above a healthy weight for their height and age.
Children above a healthy weight may develop health problems in childhood, such as asthma; sleep problems; hip, knee and ankle problems; and high cholesterol or blood pressure.
Children who are above a healthy weight are also much more likely to become overweight adults, putting them at risk of health problems like heart disease, diabetes and cancer.
You can do a lot to help your whole family develop healthier eating habits, and keep them active and well.
Children’s growth can change over time, so it’s important to check your child’s height and weight every three months.
The result suggests you are well above a healthy weight for your height and age.
This means you weigh more than is healthy for someone of your height, age and sex. Being above a healthy weight can put you at risk of poor health as an adult.
There are many easy changes you can make and there is lots of support for a healthy lifestyle available.
Growth can change over time, so it’s important to check your height and weight every three months.
Email your results
Send these results to your inbox to save them for later or to start a discussion with a health professional. Enter your email below.
What can you do?
Go4Fun® is a healthy lifestyle program for children aged 7-13 years who are above a healthy weight, and their families. Programs are run during the school term and are led by trained, qualified health professionals.
Join the Get Healthy Service (16 years and over)
Free personalised telephone coaching to help improve eating habits, physical activity levels, and to achieve and maintain a healthy weight.
Munch & Move
Munch & Move is a fun, play-based program that supports the healthy development of children aged birth to five years by promoting physical activity, healthy eating and reduced small screen time. The program provides training and resources to educators working in NSW early childhood education and care services.
Families can access fact sheets with information to make healthier choices.
Learn more
8 Healthy Habits
Here are eight ways to help you maintain a healthier lifestyle:
Drink water instead of soft drink, juice or cordial
Choose healthier snacks and fewer unhealthy treat foods
Aim for at least 5 serves of vegetables and 2 serves of fruit every day
Limit recreational screen time
Start each day with a healthy breakfast
Be active for at least 1 hour a day, every day
Be mindful of portion size and when you feel full
Get enough sleep
8 Healthy Habits for children aged 2 years and older8 Healthy Habits for children 0-12 months8 Healthy Habits for children 12-24 monthsTranslated versions
Healthy Eating Active Living
Visithealthyliving.nsw.gov.au
Learn more
Recommended Number of Serves for children, adolescents and toddlers
Dietary patterns in a table format provide the nutrients and energy needed for all children and adolescents of average height with sedentary to moderate activity levels.
Recommended Serve Sizes
The Australian Dietary Guidelines inform people of different ages, life stages and gender, the minimum number of serves from each food group they need to eat each day, to make sure they get the full amount of nutrients their body needs.
Healthy habits and a healthy weight: Tips for your child and family
Children learn by example. One of the best ways to help your child be active and eat well is for you and your family to do it too.
Learn more
Talk to your local GP or other health care provider if you are concerned about your child’s growth.
Visit www.healthykids.nsw.gov.au for additional information and resources.
Weight category based on the result
BMI for age and sex chart
Date of measurement:
Supporting Information
Children need to grow, but they are healthiest if they stay within a certain weight range for their height and age as they grow. This is called a healthy weight for their age.
Children above a healthy weight may develop health problems in childhood such as asthma, sleep problems, hip, knee and ankle problems and high cholesterol or blood pressure.
Children who are above a healthy weight are also much more likely to become overweight adults, putting them at an increased risk of health problems like heart disease, diabetes and cancer.
It is recommended you accurately measure your child’s height and weight every three months, and use the healthy weight calculator to find out whether your child is at a healthy weight. Record the measurements over time, so that you can discuss them with your GP or health care provider.
- The healthy weight calculator uses your child’s height and weight, to calculate a body mass index (BMI).
- The calculator then plots your child’s age and BMI on the US Centre for Disease Control’s BMI for age chart for girls or boys, and uses the chart to determine whether the child is a healthy weight for their age.
- The calculator can also describe this as a percentile. Your child is a healthy weight if their BMI for age and sex is from the 5th to below the 85th percentile. A child below the 5th percentile is below a healthy weight (underweight), and a child at the 85th percentile and above is above a healthy weight.
The weight status calculation for children and teenagers is based on the BMI-for-age charts developed by the US Centres for Disease Control and Prevention (CDC 2000). These charts are designed specifically for children from 2 to 18 years of age, and the charts are recommended for use in Australian children aged 2 to 18 years. These are the charts your GP or health professional uses.
| Weight Category | Percentile Range |
|---|---|
| Below a healthy weight | Less than the 5th percentile |
| Healthy Weight | 5th percentile to less than the 85th percentile |
| Above a healthy weight | 85th to less than the 95th percentile |
| Well above a healthy weight | Equal to or greater than the 95th percentile |
- Take the height measurement on hard flooring (i.e. without carpet) and against a flat wall.
- Remove shoes and socks, bulky clothing and hair accessories.
- Have the child stand straight with back against the wall. Make sure feet are flat, heels are touching the wall and eyes are facing straight ahead (see illustration).
- Place a pencil/book horizontally on the top of the head.
- Draw a small mark where the pencil meets the wall (don’t forget to wipe it off when you are finished).
- Using a tape measure, measure the distance from the pencil mark on the wall to the floor.
- Record the measurement to the nearest 0.1 centimetre.
Download PDF: Guide to accurately measuring the height of a child
Measuring a child’s weight:
- Place scales on hard surface (such as tile or wood) and avoid placing on carpet. If possible, use a digital scale.
- Remove shoes and heavy clothing (like a jacket or thick jumper).
- Have the child stand with both feet in the centre of the scale.
- Record the weight to the nearest 0.1 kg (or ½ kilogram if not using digital scales).
TIP: If possible, weigh the child first thing in the morning before breakfast. If you intend to repeat the measurement in future, try to repeat it at the same time of day. Remember weight can vary across the day.
Please note:
This calculator provides a general guide to healthy weight in children and teenagers. It is not intended to be a substitute for advice from a health professional. See your GP or local health professional if you are concerned about your child's growth or development.
Information about this chart is available at pro.healthykids.nsw.gov.au/calculator
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FAQs
How do you calculate your ideal body weight for kids? ›
BMI = weight(kg)/[height(m)]2
Plot the child's calculated BMI into their BMI percentile chart on clinical portal iGROW. 3. A child is overweight if their BMI is >91st percentile and obese if their BMI is on or above the 95th percentile for their age.
Body Mass Index (BMI) is a person's weight in kilograms (or pounds) divided by the square of height in meters (or feet). A high BMI can indicate high body fatness.
How much should a 14 year old weigh? ›| Male Teens: 13 - 20 Years) | ||
|---|---|---|
| 13 Years | 100.0 lb. (45.36 kg) | 61.5" (156.2 cm) |
| 14 Years | 112.0 lb. (50.8 kg) | 64.5" (163.8 cm) |
| 15 Years | 123.5 lb. (56.02 kg) | 67.0" (170.1 cm) |
| 16 Years | 134.0 lb. (60.78 kg) | 68.3" (173.4 cm) |
Ideal body weight is computed in men as 50 + (0.91 × [height in centimeters − 152.4]) and in women as 45.5 + (0.91 × [height in centimeters − 152.4]). A simple alternative would be to compute ideal body weight as the weight corresponding to an ideal body mass index of 22 kg/m2.
How do you calculate your ideal body weight example? ›To determine body weight in pounds, the desired BMI is multiplied by 5 and then add BMI/5 lb for each inch >5 ft in height. For instance, for a BMI of 20, start with 100 lb for a height of 5 ft and add 4 lb for each additional inch of height. For a BMI of 25, start with 125 lb and add 5 lb for each inch of height.
How big is obese for a 14 year old? ›| Overweight cut-off BMI greater than or equal to: | Obese cut-off BMI greater than or equal to: | |
|---|---|---|
| 14 | 22.62 | 28.57 |
| 14.5 | 22.96 | 28.87 |
| 15 | 23.29 | 29.11 |
| 15.5 | 23.60 | 29.29 |
The average weight for a 13-year-old boy is between 75 and 145 pounds, while the average weight for a 13-year-old girl is between 76 and 148 pounds. For boys, the 50th percentile of weight is 100 pounds. For girls, the 50th percentile is 101 pounds.
What is a healthy weight for a 13 14 year old? ›What is the average weight for a 13-year-old? According to the Centers for Disease Control and Prevention (CDC), most 13-year-old girls weigh around 76–148 pounds (lb) and most 13-year-old boys weigh between 75 and 145 lb, but this can vary widely.
What is the correct BMI for my age? ›18.5 to 24.9 - you have a healthy weight range for young and middle-aged adults. 25.0 to 29.9 - you are overweight. Over 30 - you are obese.
What is a good BMI for 70 year old? ›Older people.
In older adults it is often better to have a BMI of 25 to 27, rather than under 25. If you are older than 65, for example, a slightly higher BMI may help protect you from thinning of the bones (osteoporosis).
How do you calculate a child's weight by age? ›
For Infants < 12 months: Weight (kg) = (age in months + 9)/2. For Children aged 1-5 years: Weight (kg) = 2 x (age in years + 5) For Children aged 5-14 years: Weight (kg) = 4 x age in years.
How do health care professionals determine whether someone is in the healthy range for weight? ›Body mass index (BMI) is a person's weight in kilograms divided by the square of height in meters. BMI is an inexpensive and easy screening method for weight category—underweight, healthy weight, overweight, and obesity.
How do you calculate weight status? ›Adult Body Mass Index or BMI
BMI is a person's weight in kilograms divided by the square of height in meters. A high BMI can indicate high body fatness, and a low BMI can indicate too low body fatness.
BMI is calculated from height and weight (BMI = weight (kg)/height (m2).
What is the most accurate way to determine ideal body weight? ›The most common method of measuring your ideal weight is using the Body Mass Index (BMI), which measures the relationship between your weight and your height.
How do you calculate basic weight? ›To calculate weight we use the general formula mentioned below: W = mg. Where 'W' is the weight of the object, 'm' is the mass of the object, and 'g' is the acceleration due to gravity. On the earth, the value of g is 9.8 m/s2.
What is the data to calculate the ideal body weight? ›A common formula is as follows: Men: IBW (kgs) = 22 × (height in meters)2. Women: IBW (kgs) = 22 × (height in meters − 10 cm)2.
Why do we calculate ideal body weight? ›Ideal body weight, or lean body weight, is used in clinical settings to calculate safe drug dosages. Some health professionals choose to use it in clinical or office settings to provide patients and clients with weight gain and weight loss goals based on their height.
Why is it important to calculate ideal body weight? ›Your weight, waist size, and the amount of weight gained since your mid-20s can have health implications. These factors may strongly influence your chances of developing the following diseases and conditions: Cardiovascular disease including heart attack and stroke. Diabetes.
What is ideal body weight explanation? ›Ideal body weight (IBW) is a clinical standard that incorporates biometric variables including height, gender, and age. It is used to determine the proper dosage of prescribed medications for patients, and in sports to measure body weight in athletes according to a classification scale.
Is 123 pounds fat for a 13 year old? ›
A 13 year old at 5 feet 1 inches tall would be considered overweight at 120 pounds. A taller 13-year old would be considered a healthy weight at 120 pounds.
Is 100 pounds normal for a 11 year old? ›They're likely to stand somewhere between 4 and 5 feet tall at this age. Their weight will probably be somewhere between 70 and 100 pounds. But at this age, your daughter has likely entered puberty and is at the peak of a growth spurt. They might grow as much as 4 inches a year during this time.
How heavy is obese? ›| BMI | Weight Status |
|---|---|
| Below 18.5 | Underweight |
| 18.5—24.9 | Healthy Weight |
| 25.0—29.9 | Overweight |
| 30.0 and Above | Obesity |
- Whole eggs. ...
- Leafy greens. ...
- Salmon. ...
- Cruciferous vegetables. ...
- Chicken breast and some lean meats. ...
- Potatoes and other root vegetables. ...
- Tuna. ...
- Beans and legumes.
| Male | Female | |
|---|---|---|
| Height | Ideal Weight | Ideal Weight |
| 5′ 9″ | 144 – 176 lbs. | 131 – 160 lbs. |
| 5′ 10″ | 149 – 183 lbs. | 135 – 165 lbs. |
| 5′ 11″ | 155 – 189 lbs. | 140 – 171 lbs. |
The averages for 12-year-olds are 89 pounds, for males, and 92 pounds, for females. However, beyond biological sex, many other factors influence someone's weight at this age, including their height, body composition, the onset of puberty, environmental factors, and underlying health issues.
How tall is a 13 year old supposed to be? ›| Average Height and Weight According to Age | ||
|---|---|---|
| Male | Female | |
| 12 | 149 | 152 |
| 13 | 156 | 157 |
| 14 | 163 | 160 |
| Age (years) | 50th percentile height for boys (inches and centimeters) |
|---|---|
| 11 | 56. 4 in. (143.5 cm) |
| 12 | 58.7 in. (149 cm) |
| 13 | 61.4 in. (156 cm) |
| 14 | 64.6 in. (164 cm) |
| Height | Weight | |
|---|---|---|
| 5' 3" | 107 to 140 lbs. | 141 to 168 lbs. |
| 5' 4" | 110 to 144 lbs. | 145 to 173 lbs. |
| 5' 5" | 114 to 149 lbs. | 150 to 179 lbs. |
| 5' 6" | 118 to 154 lbs. | 155 to 185 lbs. |
They're likely to stand somewhere between 4 and 5 feet tall at this age. Their weight will probably be somewhere between 70 and 100 pounds.
How much should my 7 year old weigh? ›
Weight Range
The chart provides weight ranges for children aged between 2-20 based on their sex and height. According to the chart, a 7 year old boy has a normal weight if he weighs from 41 to 68 pounds, and a 7 year old girl has a normal weight if she weighs from 40 to 69 pounds.
The averages for 12-year-olds are 89 pounds, for males, and 92 pounds, for females. However, beyond biological sex, many other factors influence someone's weight at this age, including their height, body composition, the onset of puberty, environmental factors, and underlying health issues.
How tall should a 12 year old be? ›| Age | Height - Females | Height - Males |
|---|---|---|
| 12 | 55 to 64 inches | 54 to 63.5 inches |
| 14 | 59 to 67.5 inches | 59 to 69.5 inches |
| 16 | 60 to 68 inches | 63 to 73 inches |
| 18 | 60 to 68.5 inches | 65 to 74 inches |