## BMI (Body Mass Index) Calculator kg – Charts and Formula.

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Factors that determine the ideal body weight include your age, gender, height, health, body fat, muscle mass, and bone structure. You need to calculate your ideal weight to help you to keep track of your weight. To meet this objective, you need to know your BMI (Body Mass Index).

Below is a guide that will take you through everything you need to know about body mass index. This guide will help you to identify how to calculate your BMI in both Kilograms and pounds, whether to trust BMI charts, and help you to identify the correct BMI for a male as well as a female. The information is relevant to adults.

BMI

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## Who Discovered BMI?

Lambert Adolphe Jacques Quetelet discovered the concept of BMI. He was a Belgium astronomer, mathematician, statistician, and sociologist from the 1800s. The provided formula is as below.

*BMI = weight (kg) / height 2*

His idea was to try to quantify the amount of tissue mass in an individual. The interest arose from the changing lifestyle people led which led to obesity in the western societies. Ancel Keys published the concept later in the year 1972 in the Journal of Chronic Diseases. This publication argued that more information should be provided about an individual before determining their accurate BMI. However, both philosophers agreed that calculating BMI served larger populations very well.

## What is Body Mass Index?

Body Mass Index refers to the a measure of body fat to help distinguish whether one is underweight, thin, overweight, obese, or normal. Many people do not see the need to calculate their BMI. The idea is to avoid health concerns that arise by being overweight or underweight.

BMI, also known as Quetelet index is derived from the mass and height of a person. To obtain the exact value, one has to divide the body mass by the square of one’s body height. Body mass is measured in kilograms and the height in meters. You can also determine BMI using a chart.

Universally, body mass index is expressed in kg/m2. However, you can also use pounds against inches. In the case where one used pounds against inches, one must use a conversion factor of 703 (kg/m2/)/(lb/in2). BMI is the numerical value of your weight in relation to your height.

## What should my BMI be in KG?

Remember, the objective of calculating BMI is to identify whether your weight is healthy and safe for you. Different people will have different BMI readings that will be considered safe and healthy. The higher your BMI, the more body fat one contains. The following are the standard BMI measurements.

A BMI of less than 18.5 means you are underweight

A BMI of between 18.5 and 24.9 means you have normal weight

A BMI of between 25 and 29.9 means you are overweight

A BMI of more than 30 means that you are obese

## How do I calculate my BMI in KG?

The actual formula to calculate BMI uses weight in kilograms divided by height in meters, squared. Below is a formula to use when calculating BMI in kilograms.

Weight (kg)

Height (m2)

## Are BMI Charts Accurate?

Online BMI charts provide an easy way to identify your BMI without having to get mathematically involved. While they make it easier for you to keep track of your BMI, they are not as accurate as practically calculating it. This is not to say that they will mislead you. They tend to round off the figures.

On the other hand, there is the concept of genetics when looking at an individual’s body mass. This can be tricky to simply read off their BMI on a chart. This is because the chart is designed to provide a BMI based on an individual’s height and body mass without putting other factors into consideration to determine whether one is healthy or not.

Despite the challenges and critic of the BMI method of defining whether one has healthy weight or not, it is being used by health care providers. BMI Calculations have proven functional over the years and it is still a widely supported method supported by health professionals.

## How much should I weigh in KG for my height?

When measuring the weight of an individual to help determine whether one is healthy by using BMI comes with challenges. It can be difficult to determine whether the weight of the individuals is from fat or from body muscle. If the weight arises from body muscle, then the individual is said to be healthy. If the weight arises from body fats, then the situation raises an alarm, as too much body fat is unhealthy.

However, as a guide, you can check if your weight in kilograms is healthy against your height. Remember, one size does not fit all. This is because there are several factors to consider such as the general health of the individual, the body type, bone density, sex, as well as the age of the individual.

## What are Kilograms?

A kilogram is considered as the base unit of mass. It has the symbol (kg). it is recognized in the International System of Units (SI). It is equal to the mass of the prototype of the Kilogram (IPK), which is commonly referred to as Le Grand K. One unit of mass is equal to 1000 grams. It is a readily accepted mode of measurement across the globe though it is not as popular in the United Kingdom as compared to other countries.

## How Many Pounds are in a Kilogram?

An individual can interchange reading in terms of kilograms or pounds. Depending on the popularity of the weighing measurements, you need to be able to understand how they correlate.

A pound (lb) is equivalent to 0.22046 kilograms (kg).

Measuring weight in pounds in more popular in the United Kingdom, whereas measuring in kilograms is more popular in the United States.

## What is the Best BMI for a Woman?

A female adult will use the standard BMI calculations. Despite the fact that women and men vary in their physic and body structure, calculating BMI remains with the same formula.

A BMI of less than 18.5 means you are underweight

A BMI of between 18.5 and 24.9 means you have normal weight

A BMI of between 25 and 29.9 means you are overweight

A BMI of more than 30 means that you are obese

## What is the Average BMI for a Woman?

The average BMI for a woman is similar to that of a man. Many argue that this should not be the case due to the different body appearance and the different genes. However, the normal recommended BMI for a woman is about 21.

## What is the Best BMI for a Man?

Men have a varying physic from that of their female counterpart. However, when calculating whether their weight is normal or not, the method of calculating BMI remains the same = body mass against height.

## What is the Average BMI for a Man?

A physically fit man with a normal BMI will have a BMI of about 21. Keep in mind that this may be different when considering the height against the weight factor as men tend to be taller with more muscle as compared to women who tend to have more fat deposits on their body.

Other factors to consider are whether you have lean muscle or fat deposits. If your BMI is relatively higher but your weight comes from muscle rather than body fat, then you have little to worry about. As one gets older, their BMI will also increase thus the need to consider age against BMI results.

## How do you Calculate Ideal Body Weight?

Body weight can be measured on a weighing machine. Nevertheless, if you have to calculate the correct and healthy body weight, then you need to know your BMI. Online charts and tables. can also be helpful.

## What is the Ideal Weight for 5 ft 3 inch Female in Kg?

A 5,ft 3,inch female should weigh between 103.5 and 126.5 pounds. To arrive at this, allow 100 pounds for every 5 feet making it 100 pounds. Add an extra 5 pounds for every extra inch. In this case, 3-inches makes it 15 pounds. This makes it a total of 115 pounds. 10% of 115 is 11.5. Apply a plus and minus 11.5pounds on 115 pounds and the ideal weight of a female who is 5 3 will between 103.5 and 126.5 pounds. Considering that a pound is equivalent to 2.2046 kg, this female will weigh between 52 and 62 kilograms.

## N/B: Summary for the ideal weight in kgs for the male and female

The following information indicates the ideal weight a female and male counterpart with the same weight. If they are both 5’ 1” the ideal weight should range between 45 and 55 kilograms. For a height of 5’ 2”, the ideal weight should range between 48 and 59 kilograms. A weight of between 50 and 61 kilograms is ideal for people that are 5’ 3” in height.

## How do you Calculate Ideal Body Weight in Pounds?

Example by www.cdc.gov

Let’s calculate Sam’s BMI using the English numeric system. His weight is 37 pounds and 4 ounces and his height is 41 1/2 inches.

Convert ounces and fractions to decimals:

Weight of 37 lbs and 4 oz = 37.25 lbs (16 ounces = 1 pound so 4 oz/16 oz = 0.25).

Height = 41.5 in.

(37.25 lbs / 41.5 in / 41.5 in) x 703 = 15.2

## Bottom Line

*The method of checking whether your weight is healthy by using BMI has been effective over many years. Everyone changes their weight as they age. BMI helps to determine whether you are living a healthy lifestyle. It is therefore, important that one understands their ideal weight. By so doing, this will avoid cases of being underweight or overweight. Underweight circumstances overwork the body whereas overweight circumstances slow down your metabolism. One needs to remember that a healthy weight will vary from one individual to another.*

*The need to retain a healthy weight will not only leave you looking nice but it also comes with other advantages. You will also retain a healthier body thus boosting your ability to fight off weight related ailments such as obesity. Also, you will be able to get around and carry out your everyday tasks with ease.*

*Age, gender, height, health, body fat, muscle mass, and bone structure are factors that determine your BMI. You need to calculate your ideal weight to help you to keep track of your weight. To meet this objective, the above guide will help you to calculate your BMI (Body Mass Index). Regularly weigh yourself and depending on your current height, calculate if you need to add or lose some weight.*

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