BMI Calculator

Body Mass Index

Gender

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Age

Years Between 2 years to 120 years

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Height

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Weight

in Kgs

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Your BMI is

Underweight

Normal

Overweight

Obesity

Healthy BMI range: 18.5 kg/m² - 25 kg/m²

Introduction to the body mass index (BMI)

Body Mass Index (BMI) is widely used as an indicator of body fat content. Your weight alone is not sufficient to establish if you are in a healthy weight range. For example, a tall but slender person can weigh more than a short but plump individual. But the former may enjoy better health as long as their weight is suitable for their height. The ideal weight is also likely to differ for men and women of similar heights.

How then do you know whether you fall in the healthy weight range or not? Your BMI solves this confusion. It correlates your weight with your height and evaluates whether your weight is appropriate for your stature. You can use a BMI calculator to find out your BMI.

Although not an exact measurement of body fat percentage, in most cases, BMI is a reliable tool for establishing risk levels for illnesses, especially ailments related to excess body fat. Many healthcare professionals use BMI to determine effective doses for medicines. Often people with a higher BMI need higher doses. Hence, it is crucial to be aware of your BMI to ensure your overall wellness.

Why Use a BMI Calculator?

Using a BMI calculator is a convenient way to determine your BMI score quickly. Below are some key reasons to use this tool:

Health Monitoring

Fitness Goals

Weight Management

Health Assessment

Health Monitoring

A BMI calculator helps you keep track of your health. It enables you to spot potential health issues early on so you can take action to stay healthy. The calculator can provide you with the opportunity to take proactive measures to maintain and enhance your health.

How to calculate BMI

If you want to calculate your BMI, you have to find out your weight and height first. Once you know these values, you can arrive at the result by following the two steps mentioned below:

Multiply your height by itself (height X height).

Divide your weight by the answer you get in the first step.

The equations for calculating the BMI are as follows:

International System of Units (SI)

BMI = weight (kg) ÷ (height (m))2

Example:
For a 177 cm (1.77 m) individual weighing 75 kg,
BMI = 75 / (1.77 * 1.77) = 75/ 3.13 = 23.96

Imperial System

BMI = weight (lb) ÷ (height (inches)) 2 × 703

Example:
For a 160-pound, 5’8” (68”) individual weighing 75 kg,
BMI = (160/ 68*68) * 703 = (160/4624) * 703 = 24.3

You can also use an online BMI calculator to find out your BMI and eliminate human errors.

How to calculate BMI

For adults over the age of 20 years, BMI values are grouped into the following weight status categories¹:

BMI

Weight status

Below 18.5

Underweight

18.5–24.9

Normal weight

25–29.9

Overweight

30–35

Obese

Over 35

Morbid obesity

The range remains the same for males and females. There is no separate BMI calculator for men and women.

BMI for Children

In children, body fat content changes with age. It is also normal for teenage girls to have more body fat than boys. BMI calculation for children follows the sameformula as adults. But the value is then plotted on standard gender-specific BMI-for-age percentile charts for children. It determines the child's weight status compared to children of the same gender and age.

For example, a 25th percentile BMI for a 6-year old female child would indicate that the child's weight is higher than 25% of girls aged 6.

What are the health risks related to being overweight?

Excess weight brings with it countless health complications, some of which can be fatal. A higher BMI than average (over 25) is associated with increased risks for diseases like:

Type 2 diabetes
Heart conditions
Higher levels of LDL cholesterol and lower count of HDL cholesterol in the blood, increasing chances of coronary artery diseases and heart attacks
High triglycerides
Stroke
High blood pressure
Gall bladder-related complications
Insulin resistance

Osteoarthritis or breakdown of joint cartilage leading to painful joints
Sleep apnea or intermittent breathing obstruction during sleep
Atherosclerosis or building up of cholesterol deposits (plaques) in blood vessels (arteries)
Skin health problems like skin tags, darkening of the skin
Breathing trouble
Hernia
Varicose veins
Cataract
Gout
Stress incontinence or urge to urinate frequently
Certain types of cancer (breast, colon, endometrial, gall bladder, kidney, liver)
Clinical depression and other mental health issues
Poly-cystic ovarian disease in women leading to reduced fertility and other menstrual irregularities

Varicose veins
Cataract
Gout
Stress incontinence or urge to urinate frequently
Certain types of cancer (breast, colon, endometrial, gall bladder, kidney, liver)
Clinical depression and other mental health issues
Poly-cystic ovarian disease in women leading to reduced fertility and other menstrual irregularities

What are the risks of being underweight?

Having a BMI below 18.5 is also fraught with health risks, such as the ones listed below:

Vitamin deficiencies
Anaemia (low red blood cell count and hence reduced capacity to carry oxygen)
Diminished immunity or the ability to ward off infections
Osteoporosis or brittle bones that break easily
Malnutrition
Developmental delays in children
Hormonal imbalances
Disruptions in women's menstrual cycle causing complications in conception

Being underweight can also be an indication of underlying health conditions like anorexia. Hence, if your BMI calculator shows a value matching the underweight category, you should consult a medical professional.

Conclusion

Due to the elevated stress of today's lifestyle and increased pollution levels, obesity and associated lifestyle diseases are rampant even among the youth. Thus, a BMI calculator in India is a useful tool as it can help you assess your health risks. A medical practitioner can help you understand your BMI's implications and guide you towards healthy life choices to prevent any complications.

However, apart from maintaining a healthy lifestyle, it is also crucial to stay prepared for unexpected health complications. Healthcare costs are skyrocketing, and the expenses for quality treatment can strain your financial resources. Fortunately, a health insurance policy can safeguard your savings by covering your healthcare expenses. Hence, along with adopting healthy habits, you can also consider investing in a comprehensive health insurance policy. This will secure your family against the financial repercussions of medical exigencies.

Frequently Asked Questions

1. Is BMI accurate for everyone?

BMI may not be completely accurate for everyone, as it mainly considers height and weight and may not account for other important health factors such as muscle mass, underlying health conditions and overall fitness. However, it can be a useful starting point for understanding more about your general health and weight.

2. Can BMI help in health insurance assessments?

Yes, BMI can help in health insurance assessments. Maintaining a healthy BMI may improve your eligibility for health insurance plans. It may also help you purchase suitable coverage options at potentially affordable premium rates.

3. Does age affect BMI results?

Age does not directly affect the BMI result. The BMI is calculated using only height and weight. However, age can indirectly influence BMI results as your weight and body composition may change over time as you grow older.

4. Can a BMI calculator help with weight loss planning?

Yes, a BMI calculator can help with weight loss planning. The BMI gives you an understanding of your health based on your height and weight. You can use this metric to achieve your weight management goals.

5. How often should I check my BMI?

You can check your BMI annually. However, if you are to lose or gain weight, you may choose to monitor your BMI more regularly to track your progress.

6. Is BMI useful for fitness tracking?

Yes, BMI can be useful for fitness tracking as it helps you understand your weight in relation to your height. However, it may not give you a complete assessment of your health.

7. What is the purpose of calculating BMI?

The primary purpose of calculating BMI for women and men is to assess whether the weight is within a healthy range for the height. The BMI calculator gives you a numeric value that helps you understand if you are underweight, average weight, overweight or obese. This, in turn, highlights the health concerns you are at risk for. The BMI calculator can be used by individuals, patients, as well as healthcare professionals to gain a better view of a person’s health. Moreover, it is a straightforward and simple tool that enables you to take charge of your health.

8. Are there any age or gender specific considerations for BMI?

Yes, BMI calculations are generally age and gender specific. This means you must know how to calculate BMI for men and women separately to understand the assessment in each case effectively. While the method of calculation remains the same, the results may be perceived differently for men and women.

9. Can BMI be used during pregnancy?

BMI is generally not an ideal tool for assessing a woman’s weight during pregnancy. This is because pregnancy brings about natural changes in your weight and body distribution, which makes BMI less accurate. It is crucial for pregnant women to ask their healthcare providers to monitor their weight and health during this stage. Instead of using BMI, healthcare professionals may employ alternative methods to ensure more precise and relevant assessments.

10. What are the limitations of the BMI calculator?

Although the BMI calculation formula is quite accurate in determining your health status, it has certain limitations. One significant drawback of the calculator is that it cannot differentiate between muscle and fat. This can pose a concern for athletes and those with above-average muscle mass. The BMI calculator also fails to account for body fat distribution. It does not distinguish between muscle, excess fat or bone mass, nor does it offer insights into how fat is distributed among individuals. Hence, it is crucial to incorporate other health metrics for a more nuanced health assessment.

11. What is a good BMI for a man?

A BMI between 18.5 and 24.9 is generally considered normal for most adult men. However, as highlighted above, it is essential to understand that this does not take into consideration the individual’s muscle mass, fitness level and specific health conditions.

12. What is a good BMI for a woman?

Like men, a BMI between 18.5 and 24.9 is commonly considered healthy for most adult females. Nevertheless, individual factors such as muscle mass, fitness level and specific health conditions play a crucial role in a comprehensive health assessment.

13. Should I ignore my weight and concentrate on my BMI?

It is essential not to ignore either your weight or BMI, as both metrics play integral roles in understanding your overall well-being. Weight is a fundamental component in the calculation of BMI, while BMI considers the relationship between your weight and height to provide a realistic picture of your overall health. Therefore, you must consider both weight and BMI.

IL/COMP/DOC/Aug/2026/178/0858

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