How much should I weigh for my height and age How much should I weigh for my height and age

How much should I weigh for my height and age?

 

No individual has a set ideal weight that they should strive for. Various tools can provide a guide, but they may not be exact for each person. Therefore, it is essential to consider factors such as body type, muscle mass, and lifestyle when determining an appropriate goal weight.

Despite the existence of tools to estimate a moderate weight range based on age, height, and sex assigned at birth, it is essential to remember that every person is unique, and there is no one-size-fits-all formula to determine the ideal weight for an individual.

Being a specific size does not necessarily indicate a person's overall health. Even if a person is not within the recommended weight range, they can still improve their health through a healthy diet, regular exercise, and other healthy lifestyle habits.

Although medical experts have varying opinions on the accuracy of tools such as body mass index (BMI), it is crucial to recognise that not everyone with excess weight will experience health issues. Therefore, it is essential not to rely solely on these tools to make health decisions.

Despite this, some scientists think that people who are overweight and don't have any other medical issues may still be prone to obesity-associated illnesses such as metabolic syndrome and heart disease in the long run.

Consulting a doctor can benefit individuals who want to understand better their health status, potential risks, and ways to promote health.

Body mass index (BMI)

BMI is classified according to a single number derived from a person's weight and height calculation. This calculation is commonly used to measure a person's body mass index.

  • A BMI below 18.5 indicates being underweight.

  • A BMI between 18.5 and 24.9 falls within the healthy weight range.

  • A BMI between 25 and 29.9 suggests the possibility of being overweight.

  • A BMI of 30 or above may signal obesity.

Weight and height guide chart

Body Mass Index (BMI) is a measure used to determine a person's weight about their height. It is calculated by dividing the person's weight in kilograms by their height in meters squared. According to the NIH, a BMI of 18.5 to 24.9 is classified as moderate (“normal”) weight, 25.0 to 29.9 is classified as overweight, 30.0 to 39.9 is classified as obese, and 40 or higher is classified as severe obesity.

 

Height

Moderate weight

BMI 19–24

Overweight

BMI 25–29           

Obesity

BMI 30–39

Severe obesity

BMI 40+

4 ft 10 in

(58 in)

91–115 lb

174–202 lb

143–186 lb

191–258 lb

4 ft 11 in

(59 in)

94–119 lb

174–202 lb

148–193 lb

198–267 lb

5ft

(60 in”)

97–123 lb

128–148 lb

158–206 lb

204–276 lb

5 ft 1 in

(61 in)

100–127 lb

132–153 lb

158–206 lb

211–285 lb

5 ft 2 in

(62 in)

104–131 lb

136–158 lb

164–213 lb

218–295 lb

5 ft 3 in

(63 in)

107–135 lb

141–163 lb

169–220 lb

225–304 lb

5 ft 4 in

(64 in)

110–140 lb

145–169 lb

174–227 lb

232–314 lb

5 ft 5 in

(65 in)

114–144 lb

150–174 lb

180–234 lb

240–324 lb

5 ft 6 in

(66 in)

118–148 lb

155–179 lb

186–241 lb

247–334 lb

5 ft 7 in

(67 in)

121–153 lb

159–185 lb

191–249 lb

255–344 lb

5 ft 8 in

(68 in)

125–158 lb

164–190 lb

197–256 lb

262–354 lb

5 ft 9 in

(69 in)

128–162 lb

169–196 lb

203–263 lb

262–354 lb

5 ft 10 in

(70 in)

132–167 lb

174–202 lb

209–271 lb

278–376 lb

5 ft 11 in

(71 in)

136–172 lb

184–213 lb

215–279 lb

294–397 lb

6 ft

(72 in)

140–177 lb

184–213 lb

221–287 lb

294–397 lb

6 ft 1 in

(73 in)

144–182 lb

189–219 lb

227–295 lb

302–408 lb

6 ft 2 in

(74 in)

148–186 lb

200–232 lb

233–303 lb

328–443 lb

6 ft 3 in

(75 in)

152–192 lb

200–232 lb

240–311 lb

328–443 lb

6 ft 4 in

(76 in)

156–197 lb

156–197 lb

246–320 lb

328–443 lb

 

BMI is not the only way to assess body size; it does not consider the variety of body sizes and shapes among individuals. Talk to your doctor if you have questions about calculating or interpreting your BMI score.

BMI based on age

BMI calculations for people aged 2 to 19 years are based on age and sex assigned at birth, as children usually get bigger with age. These calculations should be used for this age range.

The  BMI charts for children compare measurements to those of children of the same age and gender. These percentile charts allow for comparison between measurements of boys and girls.

A doctor should be consulted if a parent has questions regarding their child's Body Mass Index (BMI).

What is the problem with BMI?

BMI is a simple calculation that considers a person’s height and weight. However, this measure does not consider other factors, such as

  • The proportion of muscle mass

  • The proportion or distribution of fat,

  • Waist or hip measurements.

Although high-performance athletes may have a high Body Mass Index (BMI) due to their larger muscle mass, this does not necessarily mean they are overweight for their height. This is because the ratio of muscle to fat in their body is usually higher than the average person, resulting in a higher BMI.

BMI is inaccurate when measuring body fat in people from different racial or ethnic groups. For example, non-Hispanic whites and non-Hispanic blacks may have significantly different levels of body fat but the same BMI as people from other groups despite being of the same weight.

This imprecision can result in an incorrect diagnosis or a miscalculation of risk factors.

BMI is a metric used to estimate the relative weight of a person based on their height. It can be a good indicator of whether a person is at a moderate weight or not, and it is useful for tracking changes in the weight of a population over time. Therefore, one should not solely rely on a single factor such as weight to determine whether it is optimal for their health.

 

Waist-to-hip ratio (WHR)

By dividing the waist size by the hip size, a person's WHR can be calculated. A higher WHR indicates more visceral fat in the abdominal cavity, which can harm one's health.

Thus, when taken with other health status assessments, the WHR can provide valuable insight into an individual's potential health risks.

People with a high waist-hip ratio (WHR) are likelier to experience a myocardial infarction or heart attack than those with a lower WHR.

Measuring WHR

A person's WHR can be calculated by measuring their waist circumference at the narrowest point near their belly button and then dividing it by the circumference of their hips at their widest point.

To calculate the waist-to-hip ratio (WHR), one must divide the waist circumference by the circumference of the hips. For instance, if a person's waist circumference is 28 inches (in) and their hip circumference is 36 inches, the WHR would be 0.77 (28 divided by 36).

What does it mean?

An abdominal obesity report published by the World Health Organization (WHO) in 2008 defined abdominal obesity as follows:

  • Over 0.9 WHR in males

  • Over 0.85 WHR in females

Despite this, the WHR is still helpful for assessing one's risk of diseases such as heart disease and stroke, as it does not accurately consider a person's total body fat percentage or muscle-to-fat ratio.

The 2008 WHO report indicated that the ideal waist-to-hip ratio (WHR) varies based on gender, race, and ethnicity.

Consequently, body size should not solely determine a person's health. Instead, a holistic approach should be taken, considering a person's overall health status.

Waist-to-height ratio

By comparing a person's waist circumference with their height, the waist-to-height ratio (WtHR) is a valuable method to evaluate body size.

Studies conducted in 2015 revealed that a higher Waist-to-Height Ratio (WtHR) was linked to lower cholesterol and blood pressure levels despite having a healthy Body Mass Index (BMI). Therefore, WtHR can help assess health risks when combined with other health indicators.

Measuring WtHR

The waist size to height ratio of 0.5 or lower indicates moderate health. To determine this ratio, divide the waist size by the height measurement.

Waist measurements can provide insight into an individual's risk for developing certain health conditions, such as heart disease and diabetes.

 A study investigated the relationship between waist-to-hip ratio (WtHR) and lifespan. Results showed that individuals with a WtHR of 0.52 or higher had a significantly shorter lifespan, and the effect was more pronounced in males. However, this study did not take into consideration the participant's ethnicity.

A 30-year-old male with a 0.7 WHtR may be at risk of having their lifespan reduced by 7.2 years compared to the average lifespan for their age. Similarly, a female of the same age and WHtR may have their lifespan reduced by 4.6 years.

Although examining trends in populations is useful, individual health is multifaceted. If an individual is worried about the potential health risks associated with an elevated waist-to-high ratio (WtHR), it is important to consult a medical professional.

Body fat percentage

Body fat percentage measures the amount relative to their total body weight. Fat can be found in many body areas, including the belly, arms, and legs.

To stay healthy, the human body requires certain amounts of fat. This fat is essential for the brain, nerves, membranes, and bone marrow. Additionally, fat in the chest and abdomen helps to protect the body's internal organs. In times of need, the body can also use this type of fat as energy.

Recommendations

In addition to general guidelines for males and females, the optimal amount of body fat can vary depending on a person's body type or level of physical activity.

Depending on individual body type and level of physical activity, the amount of body fat considered optimal for males and females can vary. Such as

  • Heart disease

  • High blood pressure

  • Diabetes
  • Stroke

Unlike BMI, WHR, and WtHR, measuring body fat percentage can provide more accurate information about a person’s body composition.

How to measure body fat:

Body fat percentage is usually done through a skinfold measurement, using callipers to take the thickness of a fold of skin.

A healthcare provider will assess the thickness of tissue in the thigh, abdomen, and chest for men or in the upper arm for women.

Another measure is

  • Hydrostatic body fat measurement is commonly known as underwater weighing.

  • Air densitometry is a technique that assesses body composition through air displacement.

  • Dual-energy X-ray absorptiometry is a medical imaging method used to gauge body composition.

  • Bioelectrical impedance analysis is a method that measures body fat using electrical impedance.

Even though none of these can provide an exact result, the estimates can be sufficiently accurate to offer a reliable estimation.

Takeaway:

People have different opinions about what constitutes an ideal body weight.

 

Utilising BMI, WHR, WtHR, and body-fat percentage measurements together may be the best way to determine if an individual's body size is moderate.

It is important to note that physical size is not the only indicator of a person's overall health.

Individuals must consult a doctor for questions or concerns about their weight, waist size, or body composition. A doctor can help evaluate an individual's health and provide guidance on how to manage any potential health risks.

Connect with one of our doctors at Mobi Doctor with the click of a button and receive the care you require.

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