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BMI Calculator
Simply enter your details to calculate your BMI.
All fields are mandatory *
Introduction to the Body Mass Index (BMI)
What is BMI Calculator?
Why Use a BMI Calculator?
A BMI (Body Mass Index) calculator is a tool used to estimate body fat based on height and weight. Here's why it's used:
1. Quick and Easy Assessment
BMI is a simple calculation that provides a general idea of whether a person's weight is healthy for their height.
2. Screening Tool
It helps identify potential weight-related health risks, such as being underweight, overweight, or obese.
3. Population Health Measure
BMI is used to track weight trends in populations and inform public health initiatives.
4. Starting Point for Discussion
While not a perfect measure, BMI can be a starting point for conversations with healthcare providers about weight and health.
5. Monitoring Tool
It can be used to track changes in weight over time and assess the effectiveness of weight management strategies.
BMI Chart for Adults
| Category | BMI range – Kg/m2 |
| Severe Leanness | <16 |
| Moderate Leanness | 16-17 |
| Mild Leanness | 17-18.5 |
| Normal | 18.5 – 252 |
| Overweight | 25- 30 |
| Obesity Class 1 | 30- 35 |
| Obesity Class 2 | 35 – 40 |
| Obesity Class 3 | >40 |
BMI Chart for Individuals Between the Age of 2-20
| Category | Percentile range |
| Underweight | <5% |
| Healthy Weight | 5% - 85% |
| High risk of overweight | 85% - 95% |
| Overweight | >95% |
BMI Formula
Health Problems Caused Due to Being Underweight
- Nutrition deficiencies, malnutrition, anaemia
- Osteoporosis – a problem where the bone breaks easily
- Decreases immunity
- Hormonal imbalances in case of women, reproductive issues leading to miscarriage or disrupted menstrual cycle.
- Higher risk of mortality
Health Problems Caused Due to Being Overweight
- High blood pressure
- High cholesterol that is high level of bad cholesterol and low level of good cholesterol
- Diabetes
- Coronary heart disease
- Gallbladder issues
- Osteoarthritis – caused by breaking down of joint cartilage
- Sleep apnea and breathing problems
- Low quality of life
- Mental illness such as clinical depression, anxiety and others
- Body pains and difficulty in physical functions
Limitations of BMI Calculator
In case of adults
In case of Child
Other Ways to Estimate Health Risks Associated with Weight
FAQs (Frequently Asked Questions)
What is the Right BMI for a Woman?
Here is the chart for the right BMI for women
| Category | Range |
| Underweight | Below 18.5 |
| Healthy Weight | 18.5 – 24.9 |
| Overweight | 25-29.9 |
| Obese | 30-39.9 |
What is the Right BMI for a Man?
The BMI for man is same as that of woman and that is
| Category | Range |
| Underweight | Below 18.5 |
| Healthy Weight | 18.5 – 24.9 |
| Overweight | 25-29.9 |
| Obese | 30-39.9 |
Are BMI Calculators Useful?
Although the BMI calculator is not a perfect measure for body fat, yet this is helps in assessing the overall health of a person to a certain level. For example, an athlete may have higher BMI because of denser muscle and bone health but would be actually more healthier than an average person of the same age.
How to Use a BMI Calculator?
Enter you weight and your height as per the given metrics. Click on compute now and your BMI will be shown.
What is the rule for the BMI calculator?
The rule for the BMI calculator is: BMI = (weight in kg) / (height in meters)^2. This means you must take your weight in kilograms and divide it by the square of your height in meters to get your BMI.
What is BMI not applicable for?
BMI is not applicable to children, during pregnancy, or those who are very muscular. This is because BMI does not take into account the unique body composition of such individuals.
DisclaimerThe information contained herein is generic in nature and is meant for educational purposes only. Nothing here is to be construed as an investment or financial or taxation advice nor to be considered as an invitation or solicitation or advertisement for any financial product. Readers are advised to exercise discretion and should seek independent professional advice prior to making any investment decision in relation to any financial product. Aditya Birla Capital Group is not liable for any decision arising out of the use of this information.