**Best Answer: **

According to the Centers for Disease Control and Prevention, or CDC, kids with BMIs **between the 5th and the 85th percentiles** fall within a normal, healthy range. However, if you’re child’s BMI is at the 85th percentile or above-based on his gender and age-he is considered overweight or obese, according to the CDC.

## FAQ

### What is the formula for BMI for age?

**BMI = weight (kg) / height (m)x****BMI** is the commonly accepted index for classifying adiposity in adults and it is recommended for use with children and adolescents.

### How do you calculate BMI formula?

The formula for BMI is **weight in kilograms divided by height in meters squared**. If height has been measured in centimeters, divide by 100 to convert this to meters. When using English measurements, pounds should be divided by inches squared. This should then be multiplied by 703 to convert from lbs/inches^{2} to kg/m^{2}.

### How do I calculate my child’s BMI in kg?

With the metric system, the formula for BMI is **weight in kilograms divided by height in meters squared**. Since height is commonly measured in centimeters, divide height in centimeters by 100 to obtain height in meters.

### Is the BMI formula the same for adults and children?

BMI is interpreted differently for children and teens, even though **it is calculated using the same formula as adult BMI**. Children and teen’s BMI need to be age and sex-specific because the amount of body fat changes with age and the amount of body fat differs between girls and boys.

### What should a 7 year old boy BMI be?

In most cases, Boys BMI measurements for this age group (7 years old) will lie within the range between 13.53 and 20.08. The average BMI measurement for this age group Boys is 15.51, according to the CDC.

### What should a 9 year old BMI be?

In most cases, Girls BMI measurements for this age group (9 years old) will lie within the range between **13.48 and 23.28**. The average BMI measurement for this age group Girls is 16.31, according to the CDC.

### How do you manually calculate BMI?

With the metric system, the formula for BMI is **weight in kilograms divided by height in meters squared**. Since height is commonly measured in centimeters, an alternate calculation formula, dividing the weight in kilograms by the height in centimeters squared, and then multiplying the result by 10,000, can be used.

### What is the easiest way to calculate BMI?

Then, calculate BMI by **dividing weight in pounds (lb) by height in inches (in) squared and multiplying by a conversion factor of 703**. When using a handheld calculator, if your calculator has a square function, divide weight (lb) by height (in) squared, multiply by 703, and round to one decimal place.

### How do I calculate my child’s ideal weight?

**for children shorter than 5 ft, the IBW in kilograms is calculated as ([height in centimeters] ^{2} x 1.65)/1000**. for boys taller than 5 ft, the IBW in kilograms is calculated as 39 + (2.27 x [height in inches − 60]). for girls taller than 5 ft, the IBW in kilograms is calculated as 42 + (2.27 x [height in inches − 60]).

### How do you calculate a child’s age by weight?

**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.

### Are BMI calculators accurate for kids?

How Accurate is BMI for Kids? **Experts generally consider BMI for kids to be a good measure of body fat, at least among heavier children**. But in some cases it might be misleading. Athletic kids, in particular, may fall into the overweight category when they are actually muscular.

### Why is BMI calculated differently for children?

BMI is interpreted differently for children and teens even though it is calculated with the same formula. **Due to changes in weight and height with age, as well as their relation to body fatness**, BMI levels among children and teens are expressed relative to other children of the same sex and age.

### How do I figure out my BMI without a scale?

**Tape measure**.

Men: 64 – (20 x height/waist circumference) = RFM. Women: 76 – (20 x height/waist circumference) = RFM.

### How to calculate BMI using calculator?

**BMI Formulas**

- In metric units: BMI = weight (kg) ÷ height
^{2}(meters) - In US units: BMI = weight (lb) ÷ height
^{2}(inches) * 703.

### How do you calculate height and weight for a child?

**By the age of 8 to 9 years, a child attains 75% of their adult height**. Usually by the age of 18, a child’s height is double of their height when they were 2 years old. Normally babies triple their birth-weight by the end of their first year.

### What age is a child 50 pounds?

**What is Normal Growth for a Child?**

Age | Height Females in Inches | Weight Males in Pounds |
---|---|---|

4 | 37 to 42.5 | 30 to 44 |

6 | 42 to 49 | 36 to 60 |

8 | 47 to 54 | 46 to 78 |

10 | 50 to 59 | 54 to 102 |

### How do you calculate a child’s height and weight?

### How much should a 12 year old weigh?

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 much should an 11 year old weigh?

**78.5 lb.****Average Height to Weight for Male Children – 2 to 12 Years**

Male Children: 2 – 12 Years | ||
---|---|---|

9 Years | 63.0 lb. (28.58 kg) | 52.5″ (133.3 cm) |

10 Years | 70.5 lb. (32 kg) | 54.5″ (138.4 cm) |

11 Years | 78.5 lb. (35.6 kg) | 56.5″ (143.5 cm) |

12 Years | 88.0 lb. (39.92 kg) | 58.7″ (149.1 cm) |

### Does BMI apply to children?

Body mass index (BMI) is one way to estimate a person’s body fat that takes into consideration the person’s height. BMI is calculated using a person’s weight and height. In children and teens, BMI is used to find out if a child or teen is underweight, of a healthy weight, overweight, or obese.

### What is normal BMI for 8 year old?

Normal BMIs for boys range from **13.8-16.8** for a 5 year old, 14.2 to 19.4 for a 10 year old, and 16.5-23.4 for a 15 year old. Normal girl BMIs include 13.6 to 16.7 for a 5 year old, 14 to 19.5 for a 10 year old, and 16.3 to 24 for a 15 year old.

### Is 130 pounds fat for a 12 year old?

How Much Should My 12-Year-Old Weigh? According to the Centers for Disease Control and Prevention (CDC) , **a 12-year-old boy’s weight usually falls between 67 and 130 pounds**, and the 50th percentile weight for boys is 89 pounds.

### How do I help my 11 year old lose weight?

Steps for success**encourage 60 minutes, and up to several hours, of physical activity each day**. keep to child-size portions. serve healthy meals, drinks and snacks. less screen time and more sleep.

### What happens if a 11 year old is overweight?

Overweight kids and teens **can develop weight-related health problems, such as type 2 diabetes, high cholesterol, and high blood pressure** and are more likely to be overweight as adults. And adults who are overweight have a greater chance of serious health problems, such as heart disease.

### Is 120 pounds fat for a 12-year-old?

Overweight children fall between the 85th and 95th percentile, and obese children have a BMI equal to or greater than the 95th percentile. **A healthy weight for a 12-year-old girl, therefore, can generally fall anywhere between 65 and 120 pounds**.

### What is the average BMI of 7 year old?

BMI for Age

In most cases, Girls BMI measurements for this age group (7 years old) will lie within the range between **13.22 and 20.78**. The average BMI measurement for this age group Girls is 15.45, according to the CDC.

### What is the BMI for a 6 year old?

In most cases, Girls BMI measurements for this age group (6 years old) will lie within the range between **13.23 and 19.75**. The average BMI measurement for this age group Girls is 15.22, according to the CDC.

### How much should a 6 year old weigh?

Your 6-year-old now

The average 6-year-old is about 45 inches tall and weighs approximately 45 pounds. Your child will double that weight by the time he reaches adolescence and grow to five feet tall or more!

### What BMI is too low for kids?

“A BMI of **less than 5 percent** is considered underweight,” she explains. There are three main categories for poor weight gain, Saccaro says. “Too few calories in, not absorbing enough calories, or using up too many calories. The simplest to fix is the first category.”

### What is overweight for a 10 year old?

**Calculating overweight and obesity in children and adolescents**

Overweight cut-off BMI greater than or equal to: | Obese cut-off BMI greater than or equal to: | |
---|---|---|

9 | 19.10 | 22.81 |

9.5 | 19.46 | 23.46 |

10 | 19.84 | 24.11 |

10.5 | 20.20 | 24.77 |

### Can you measure BMI at home?

DIY: To determine your BMI, **divide your weight (in pounds) by your height (in centimeters) squared, and multiply that number by 703**.

### How old is a 20 lb child?

Most babies double their birth weight by five to six months of age and triple it by the time they are a year old. By one year, the average weight of a baby girl is approximately 19 pounds 10 ounces (8.9 kg), with boys weighing about 21 pounds 3 ounces (9.6 kg).

### At what age does a child weigh 40 lbs?

An average **4-year-old** weighs about 40 pounds and is about 40 inches tall. Preschoolers are still developing and refining their gross motor skills (using their arms and legs to move and play), as well as their fine motor skills (working on arts and crafts and puzzles).

### At what age is a child 80 pounds?

Child Growth Statistics

A child in the 50th percentile for weight would reach 60 lbs somewhere between ages 9 and 10. That same child would reach 80 lbs somewhere **between ages 11 and 12**.

### What is the formula to calculate weight according to height?

The formula is **BMI = kg/m ^{2}** where kg is a person’s weight in kilograms and m

^{2}is their height in metres squared. A BMI of 25.0 or more is overweight, while the healthy range is 18.5 to 24.9. BMI applies to most adults 18-65 years.

### How do you calculate a child’s height by age?

**What’s the best way to predict a child’s adult height?**

- Add the mother’s height to the father’s height in either inches or centimeters.
- Add 5 inches (13 centimeters) for boys or subtract 5 inches (13 centimeters) for girls.
- Divide by 2.

### How do you calculate for kids?

### What’s the average weight for a 10 year old?

While a 10-year-old boy usually weighs between **53 to 109 pounds**, girls of the same age often weigh between 53 to 113 pounds. The recommended range for BMI considers these weight differences. A 10-year-old boy often has a BMI between 14 and 20, whereas a girl of the same age is expected to measure from 14 to 21.

### How tall is the average 12 year old weight?

**What is considered a normal growth rate?**

Age | Height – Females | Weight – Males |
---|---|---|

10 | 50 to 59 inches | 54 to 102 pounds |

12 | 55 to 64 inches | 66 to 130 pounds |

14 | 59 to 67.5 inches | 84 to 160 pounds |

16 | 60 to 68 inches | 104 to 186 pounds |

### What is the average weight for an 8 year old?

A normal weight for an 8-year-old girl who is 47 to 52 inches tall is anywhere between **44 and 80 pounds**, according to growth charts developed by the Centers for Disease Control and Prevention. A normal weight for a 10-year-old boy who is between 50 to 59 inches tall is 54 to 102 pounds.

### What are the BMI categories for children?

**Body Mass Index Categories in Children Ages 2 to 20**

- Underweight: < 5th percentile.
- Healthy weight: 5 to 84th percentile.
- Overweight: 85 to 94th percentile.
- Obesity: 95 to 99th percentile or BMI > 30.
- Severe obesity: > 120 percent of the 95th percentile or BMI > 35 kg/m2.

### What is considered overweight for a kid?

Children with BMIs between the 85th and 95th percentiles are considered overweight. Children with a BMI above the 95th percentile are considered obese.

### What is a normal BMI for a child?

According to the Centers for Disease Control and Prevention, or CDC, kids with BMIs **between the 5th and the 85th percentiles** fall within a normal, healthy range. However, if you’re child’s BMI is at the 85th percentile or above-based on his gender and age-he is considered overweight or obese, according to the CDC.

### Is 55 pounds normal for a 10-year-old?

A 10-year-old who weighs 55 pounds **falls into the 5th percentile**. At the 5th percentile, thresholds for girls and boys are mostly the same.

### Should a 10-year-old weigh 100 pounds?

Most children between ages 2 and 10 grow at a fairly steady rate. According to the CDC growth charts, 5-year-olds should weigh between 34 and 52 pounds, 7-year-olds should weigh between 40 and 66 pounds and 10-year-olds should weigh **between 54 and 105 pounds**.

### Is 102 pounds fat for a 10-year-old?

For example, a 10-year-old boy of average height (56 inches) who weighs 102 pounds would have a BMI of 22.9 kg/m^{2}. This would place the boy in the 95^{th} percentile for BMI, and **he would be considered as having obesity**.

### Are BMI calculators correct?

BMI (body mass index), which is based on the height and weight of a person, is **an inaccurate measure of body fat content** and does not take into account muscle mass, bone density, overall body composition, and racial and sex differences, say researchers from the Perelman School of Medicine, University of Pennsylvania.

### What is more accurate measure than BMI?

A new study found that your waist-to-hip ratio might be a more accurate measure of what’s a healthy weight for you than your BMI. If you’re concerned about what these numbers mean for your health, there are steps that you can take to reach a weight that supports your health.

### What causes big stomach in children?

**Lifestyle issues – too little activity and too many calories from food and drinks** – are the main contributors to childhood obesity. But genetic and hormonal factors might play a role as well.

### How can I help my 12 year old lose weight?

**Set Up Lifestyle Changes**

- Lose the soda. Swap those calorie-heavy drinks, including juices and sports drinks, for good old water or low-fat milk.
- Make vegetable and fruits easy snack choices.
- Encourage breakfast every day.
- Don’t keep junk food in the house.
- Eat at home.

### How much should a 5’2 female weigh?

**Height and Weight Chart**

Height | Weight | |
---|---|---|

5′ 2″ | 104 to 135 lbs. | 136 to 163 lbs. |

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. |

### What is the correct BMI for my age?

**Your healthcare provider might determine possible reasons for underweight and recommend support or treatment. Maintaining a weight in the healthy BMI range is one way to support overall health as you age.…Adult BMI Calculator.**

BMI | Weight Status |
---|---|

Below 18.5 | Underweight |

18.5-24.9 | Healthy Weight |

25.0-29.9 | Overweight |

30.0 and Above | Obesity |

### Can a 12 year old weigh 100 pounds?

Overweight children fall between the 85th and 95th percentile, and obese children have a BMI equal to or greater than the 95th percentile. A healthy weight for a 12-year-old girl, therefore, can generally fall anywhere between 65 and 120 pounds.

### Is BMI constant in childhood?

For children, BMI is gender specific and age specific (Hammer et al., 1991; Pietrobelli et al., 1998). Because **BMI changes substantially as children get older**, BMI-for-age is the measure used for children ages 2 to 20 years. BMI is not a direct measure of body fatness.

### Are BMI calculators accurate for kids?

How Accurate is BMI for Kids? **Experts generally consider BMI for kids to be a good measure of body fat, at least among heavier children**. But in some cases it might be misleading. Athletic kids, in particular, may fall into the overweight category when they are actually muscular.

### What is a healthy weight for a 5 4 14 year old female?

The National Heart, Lung, and Blood Institute indicates that a healthy weight for a woman who is 5 feet, 4 inches tall ranges from 110 to 140 pounds with a BMI of 19 to 24.

### Why is my 6 year old overweight?

Two of the biggest factors that contribute to obesity in children include **poor diet and lack of physical activity**, but there are many other elements that also play a role, including: Family history. Genetics. Race and ethnicity.

### What vitamins help kids lose weight?

At the 57th Annual European Society for Paediatric Endocrinology meeting in Greece, researchers presented data that showed extra **vitamin D** helped obese children lose weight as well as reduce other health risks. Vitamin D helps your body absorb calcium so bones and teeth stay healthy.

### Why is my daughter gaining weight so fast?

What Causes Rapid Teen Weight Gain? Rapid weight gain can be caused by several things: **a disturbance in hormonal activity of the thyroid**, for example, can lead to fast weight gain. What is this? However, in many cases, rapid weight gain is a sign that extra calories, eating and activity is getting off track.