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BMI calculator
The BMI calculator helps determine your body mass index based on your weight and height, giving insights into your health status. It's a simple tool that can guide you toward understanding whether you're underweight, normal weight, overweight, or obese.
Calculate your BMI
Check your BMI and take the first step towards better health!
Healthy BMI range
18.5 - 24.9
Healthy weight for this height
0 kg
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What is BMI?
Body Mass Index (BMI) is an incredibly simple, yet powerful way to understand your overall health! By considering your height and weight, BMI helps you determine whether your weight falls within a healthy range. It's a handy tool not just for individuals but also for insurers who use it to assess health risks and reward healthy lifestyles.
BMI Category
BMI Range
Underweight
Less than 18.5
Normal weight
18.5 - 24.9
Overweight
25 - 29.9
Obesity
30 and above
Maintain a healthy BMI with the right support.
How is BMI calculated?
The body mass index can be calculated with the help of the BMI formula. You can calculate the BMI formula by dividing the weight of an adult in Kg by height in meters square:
BMI = weight (kg)/ height (m)^2
Let's understand the body mass index formula with the following example:
Suppose your weight is 55 Kg and your height is 1.65m. In this case, you can calculate BMI using height and weight by entering them into the formula, i.e. 55/(1.65 x 1.65) = 55/2.72 = 20.2.
A healthy BMI means better coverage options. Secure your future!
Why use a BMI calculator?
A BMI calculator is a quick and easy way to check if your weight is in a healthy range for your height. It helps you understand if you're underweight, overweight, or just right and whether your weight could be affecting your health.
How it helps
1
Gives a quick health check – Helps you see if your weight is healthy.2
Alerts you to possible risks – A very high or low BMI can mean a higher chance of health issues like diabetes or heart problems.3
Helps with fitness goals – Whether you want to lose, gain, or maintain weight, BMI gives you a starting point.4
Tracks your progress – A great way to see how lifestyle changes are working for you.5
Super simple to use – Just enter your height and weight, and you'll get your BMI in seconds!Know your BMI, understand your health risks, and take the next step toward protection.
BMI categories for adults
The World Health Organization (WHO) classifies BMI into different categories to help identify health risks related to weight. This BMI chart applies to both men and women aged 20 years or older. Check out the BMI table below:
Severe thinness (BMI less than 16)
Extremely underweight, which can lead to serious health problems.
Moderate thinness (BMI 16 - 17)
Underweight, with a risk of nutritional deficiencies.
Mild thinness (BMI 17 - 18.5)
Slightly underweight, and may need to gain some weight for better health.
Normal weight (BMI 18.5 - 25)
A healthy weight range with lower health risks
Overweight (BMI 25 - 30)
Higher than normal weight, with an increased risk of conditions like heart disease and diabetes.
Obese class I (BMI 30 - 35)
Moderately obese, which raises the chances of serious health issues.
Obese class II (BMI 35 - 40)
Severely obese, with a higher risk of life-threatening conditions.
Obese class III (BMI above 40)
Extremely obese, with very high health risks and possible complications.
Classification
BMI Range - Kg/m2
Severe thinness
Less than 16
Moderate thinness
16 - 17
Mild thinness
17 - 18.5
Normal
18.5 - 25
Overweight
25 - 30
Obese class I
30 - 35
Obese class II
35 - 40
Obese class III
40 and above
This BMI chart applies to both men and women aged 20 or older. It helps determine if a person is underweight, normal weight, overweight, or obese based on their BMI value.
BMI chart for adults
Check the graph of BMI categories for adults based on World Health Organization data. The dashed lines represent subdivisions within a major categorization. Take a look
Your BMI tells a lot about your health—make sure you're protected against future risks.
BMI chart for children & teens (Aged 5-18 years)
Children's BMI is measured using percentiles to compare their weight with other children of the same age and gender. Take a look at the BMI chart for children and teens in the age group of 5-18 years
This chart uses curved lines to help parents and healthcare professionals understand where a child's BMI stands compared to others of the same age. Here's a breakdown: Percentile Lines (3, 10, 25, 50): These curves show how a child's BMI compares to peers:
3rd percentile
About 3% of children at this age have a BMI at or below this line, indicating a lower-than-average BMI.
10th percentile
Around 10% of children have a BMI at or below this level, which is still on the lower side.
25th percentile
About 25% of children fall at or below this line—below average but not necessarily unhealthy.
50th percentile (Median)
This is the midpoint. About half of the children have a BMI at or below this line, making it the average range.
Adult Equivalent Cut-offs
These lines are especially useful in identifying when a child's BMI approaches adult standards for being overweight or obese:
23 Adult Equivalent (Overweight)
A BMI at or above this line is equivalent to an overweight BMI for adults.
27 Adult Equivalent (Obesity)
BMI values above this line are considered obese by adult standards.
BMI chart for children & teens (Aged 5-18 years)
The growth of children varies, so BMI alone is not enough—percentiles help track it over time. If a child is too underweight or overweight, a doctor can guide them on diet and exercise.
Understanding your child's BMI is the first step toward a healthier future.
Health risks of being overweight & underweight
Overweight
Underweight
Heart problems
Like high blood pressure, increased bad cholesterol, and low good cholesterol
Diabetes
Being overweight raises the chances of Type 2 diabetes.
Stroke
Extra weight can lead to clogged arteries, increasing the risk of stroke.
Joint pain
It can add pressure on joints that can cause osteoarthritis.
Breathing issues
Conditions like sleep apnea become more common if you are overweight.
Gallbladder disease
Being overweight can lead to gallstones and liver issues.
Cancer risk
Cancers of the breast, colon, and kidney and more if you are overweight.
Mental health struggles
Extra body weight increases the risk of depression, anxiety, and low self-esteem.
Lower quality of life
Body pain and difficulty in performing daily activities if you are overweight
To stay healthy, aim for a BMI below 25, eat well, stay active, and check with a doctor for guidance. Small changes can make a big difference!
Lack of nutrients
Your body may not get enough vitamins and minerals, leading to weakness and anemia
Weak bones
Being underweight leads to a higher risk of osteoporosis, which makes bones fragile and easy to break.
Weaker immunity
The body struggles to fight off infections due to decreased immunity.
Hormonal issues
Irregular periods, difficulty getting pregnant, & a higher risk of miscarriage are common among underweight women
Surgery risks
Your body may take longer to heal after medical procedures if you are underweight.
Health risks
Being underweight can be a sign of an underlying condition like anorexia or other medical problems.
If you or someone you know is underweight without a clear reason, it is best to consult a doctor for guidance.
Why is BMI important?
Think of BMI as your health buddy, giving you a quick snapshot of where you stand. It's more than just numbers—it's about staying on track for a healthier life!
1
A normal BMI often reflects good health, reducing the likelihood of developing chronic conditions.2
Maintaining a healthy BMI means you're setting yourself up for long-term wellness and lower health risks likeHeart health: Keep your heart in tip-top shape!
Balanced sugar levels: Reduces risks of Type 2 diabetes
Healthy joints and bones: Stay active and pain-free longer.
3
Even if your BMI is not at the ideal range or below the ideal range, there's always room to improve, and small changes can make a huge difference!Managing your BMI lowers health risks and insurance costs!
What are the limitations of BMI?
BMI is a simple way to check if your weight is healthy, but it does not tell the whole story. It only looks at height and weight, missing important details like muscle, fat, and overall health. Take a look at the various limitations of BMI as a health parameter:
Adults
Kids & Teens
Muscle weighs more than fat
A strong, fit person might have a high BMI even if they are healthy.
Where your fat is, matters
Carrying weight in the belly is riskier, but BMI does not check this.
Not accurate for short or tall people
The BMI of a very short or tall person may look too high or low, even if they are healthy.
Age and gender do not count
BMI treats a young athlete and an older person the same, even though their bodies are different.
Kids grow at different speeds
BMI does not adjust for growth spurts
Active kids may have a high BMI
More muscle can make the BMI of active kids seem high, even if they are not overweight.
Boys & girls change differently
TBMI does not consider natural body changes during puberty.
Doctors check more than BMI
Diet exercise, & family history matter to determine the health of a person, which BMI does not consider.
BMI doesn't tell the whole story—secure comprehensive health coverage for complete protection.
What are the tips to keep BMI healthy?
Embrace healthy habits
Small, consistent changes like eating balanced meals, reducing sugar intake, and staying active can significantly improve your health. Even light exercises like walking or yoga make a difference
Monitor your progress
Regular BMI checks help track trends and keep you motivated. Use mobile apps or wearables to monitor health metrics easily
Look beyond BMI
Combine BMI with other measures like waist-to-hip ratio and body fat percentage for a clearer health picture. Regular checkups provide valuable insights
Explore wellness programs
Many insurers offer perks like gym discounts, fitness challenges, and lower premiums for maintaining an active lifestyle
Stay hydrated & sleep well
Drinking enough water supports metabolism and appetite control, while quality sleep (7–8 hours) prevents weight-related issues
Set realistic goals
Focus on gradual improvements rather than drastic changes. Celebrate small milestones to stay on track
A well-maintained BMI means better health and better coverage!
BMI: An indicator of wellness
Whether you're an athlete, a fitness enthusiast, or someone just embarking on a health journey, Body Mass Index (BMI) serves as a reliable indicator to monitor your overall wellness. It acts as a simple yet effective tool to gauge whether your body weight aligns with your height, offering insights into your health status.
Understanding your BMI can help you assess potential risks for health conditions such as diabetes, heart disease, and obesity. It's a step toward taking charge of your physical well-being by identifying areas where lifestyle changes might be needed.
A healthy BMI means better coverage options. Secure your future!!
How to take care of your health?
Improving your overall wellness starts with awareness. While BMI and these complementary metrics are helpful tools, they are just one part of the puzzle. Here's how you can proactively approach your health
Regular health check-ups
Visit a healthcare professional to get a comprehensive analysis, including BMI, body fat percentage, and other health markers.
Balanced nutrition
Follow a diet that is rich in whole grains, lean proteins, fruits, and vegetables, while avoiding excessive processed foods and sugar.
Stay active
Incorporate at least 30 minutes of moderate exercise daily, including a mix of cardiovascular activities, strength training, and flexibility exercises.
Monitor stress levels
Engage in mindfulness practices, meditation, or hobbies to keep your mental well-being in check.
Track progress
Use health apps or journals to record changes in your BMI, weight, and other parameters over time to stay motivated
Taking care of yourself is the first step, but the right health insurance ensures long-term protection.
What is BMI Prime?
BMI Prime is the ratio that measures your BMI to the maximum healthy BMI limit. It helps compare your weight to a healthy limit (which is a BMI of 25). It is just a BMI ratio that shows if you are underweight, normal, overweight, or obese. The formula for BMI Prime is: BMI Prime = Your BMI ÷ 25
How does it work?
If your BMI Prime is below 0.74, you are underweight.
If it is between 0.74 and 1, your weight is in the normal BMI range for adults.
If it is above 1, you are overweight.
If it is above 1.2, you fall into the obese category.
Why is BMI Prime useful?
BMI Prime makes it easy to see how far your weight is from the healthy BMI range. It also helps compare people from different countries where BMI limits might vary.
Maintaining a healthy BMI (18.5 - 25) is important for overall well-being. If your BMI is too high or too low, lifestyle changes like a balanced diet & regular exercise can help
Classification
BMI
BMI Prime
Severe thinness
Less than 16
Less than 0.64
Moderate thinness
16 - 17
0.64 - 0.68
Mild thinness
17 - 18.5
0.68 - 0.74
Normal
18.5 - 25
0.74 - 1
Overweight
25 - 30
1 - 1.2
Obese class I
30 - 35
1.2 - 1.4
Obese class II
35 - 40
1.4 - 1.6
Obese class III
40 and above
1.6 & above
What is the Ponderal Index (PI)?
The Ponderal Index (PI) is another way to measure whether you are lean or overweight, similar to BMI. However, instead of using height squared like BMI, PI uses height cubed in its formula.
How is PI calculated?
For example, a person who is 5'10" (178 cm) tall and weighs 160 lbs (72.57 kg) would have a PI of 12.9.
USC Units
SI Metric Units
In the U.S. system: Height (in inches) ÷ Cube root of weight (in pounds)
In the metric system: Weight (kg) ÷ Height³ (in meters)
Why is PI different from BMI?
BMI is useful for large groups but may not be accurate for very tall or short individuals.
PI gives a better estimate for people who are much taller or shorter than average, as BMI can sometimes overestimate or underestimate body fat for them.
FAQs
-
Q1. How do I calculate my BMI?
Ans: You can calculate your BMI by entering your height and weight into the BMI formula. The BMI formula is: BMI = weight (kg)/ height (m)^2. So if your weight is 60 kg and your height is 1.55m, then your BMI is 60/ (1.55 x1.55) = 60/2.40 = 24.9. -
Q2. What is a normal BMI?
Ans: The normal BMI range is 18.5 to 24.9. -
Q3. What is the BMI formula?
Ans: The BMI formula is weight (kg)/ height (m)^2. Enter your weight in kg and the square of your height in meters to calculate your BMI. -
Q4. Is the BMI calculator correct?
Ans: A BMI calculator is used to accurately calculate your BMI, which helps to determine your overall wellness and if your body weight aligns with your height. However, BMI is not the most reliable parameter to evaluate your health status as it does not consider body fat, muscle, age, and gender of a person. It does not differentiate between muscle mass and body fat. As a result, a person with more muscle and less fat may have the same BMI as a person with more fat and less muscle.
BMI chart for adults
BMI chart for children & teens
For Boys
For Girls
How to understand the BMI percentile chart for boys
The BMI Chart helps track Body Mass Index (BMI) in boys aged 5 to 18, indicating healthy, underweight, overweight, and obese ranges. The curved lines represent different BMI percentiles, showing how a child's BMI compares to peers.
At the bottom of the chart, ages from 5 to 18 years are displayed, while the left and right sides indicate BMI values. The black lines represent different percentiles
Read more
How to understand the BMI percentile chart for girls
The BMI Chart tracks Body Mass Index (BMI) in girls aged 5 to 18, helping assess growth patterns and weight categories. The curved lines represent different BMI percentiles, showing how a child's BMI compares to peers.
At the bottom of the chart, ages from 5 to 18 years are listed, while the left and right sides display BMI values. The black lines represent percentiles
Read more
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