BMI Calculator

You can calculate your Body Mass Index (BMI) using this BMI calculator in kg as well as in lbs.

Online BMI Calculator
Weight (KG):
Height (CM):

Body Mass Index (BMI)

BMI Calculator calculates the Body Mass Index which is a commonly used tool to measure whether a person’s weight is in a healthy range. To calculate your BMI, follow these steps:

  1. Measure your height in meters (m) or feet and inches (in). If you are using feet and inches, convert your height to inches by multiplying the number of feet by 12 and adding the number of inches. For example, if you are 5 feet 6 inches tall, your height in inches would be 5 x 12 + 6 = 66 inches. If you are using meters, simply use your height measurement in meters.
  2. Measure your weight in kilograms (kg) or pounds (lb). If you are using pounds, convert your weight to kilograms by dividing your weight in pounds by 2.2. For example, if you weigh 150 pounds, your weight in kilograms would be 150/2.2 = 68.18 kg.
  3. Use the following formula to calculate your BMI:
    BMI = weight (kg) / height^2 (m^2) OR BMI = (weight (lb) / height^2 (in^2)) x 703

For example, if you are 5 feet 6 inches tall (66 inches) and weigh 150 pounds, your BMI would be:
BMI = (150 / (66 x 66)) x 703 = 24.2

A BMI between 18.5 and 24.9 is considered healthy. A BMI below 18.5 is considered underweight, while a BMI above 25 is considered overweight. A BMI above 30 is considered obese. However, it’s important to note that BMI is not always a perfect measure of health, as it doesn’t take into account factors such as muscle mass or body composition. It’s best to talk to a healthcare professional to determine what a healthy weight range is for you.

BMI Table for Adults

The following table shows the different BMI categories for adults, based on the World Health Organization (WHO) guidelines:

Below 18.5Underweight
18.5 to 24.9Normal weight
25.0 to 29.9Overweight
30.0 to 34.9Obesity (Class 1)
35.0 to 39.9Obesity (Class 2)
40.0 and aboveObesity (Class 3)

Note: These BMI categories are for adults aged 20 and older.

BMI Table for Children

The BMI categories for children are slightly different than those for adults, because children’s bodies are still growing and developing. The following table shows the different BMI categories for children, based on the Centers for Disease Control and Prevention (CDC) guidelines:

Age GroupBMICategory
2 to 19 years oldBelow the 5th percentileUnderweight
2 to 19 years old5th percentile to less than the 85th percentileNormal Weight
2 to 19 years old85th percentile to less than the 95th percentileOver Weight
2 to 19 years oldEqual to or greater than the 95th percentileObesity

Note: BMI is not a perfect measure for children, and it’s best to consult with a pediatrician or other healthcare professional to determine what a healthy weight range is for a child.

How To Maintain Healthy BMI

Maintaining a healthy BMI requires a combination of healthy eating, physical activity, and lifestyle choices. Here are some tips for maintaining a healthy BMI:

  • Eat a balanced diet: Make sure you are eating a diet that is balanced in nutrients and includes a variety of fruits, vegetables, whole grains, lean proteins, and healthy fats.
  • Watch portion sizes: Pay attention to your portion sizes and avoid overeating. Use smaller plates, bowls, and cups to help control portion sizes.
  • Stay hydrated: Drink plenty of water and avoid sugary drinks.
  • Stay active: Regular physical activity can help you maintain a healthy weight and BMI. Aim for at least 150 minutes of moderate-intensity exercise or 75 minutes of vigorous-intensity exercise per week.
  • Reduce sedentary time: Limit your sedentary time, such as sitting or lying down, and try to move more throughout the day.
  • Get enough sleep: Lack of sleep can disrupt your body’s hormonal balance and increase your risk of weight gain.
  • Manage stress: Chronic stress can lead to overeating and weight gain. Find healthy ways to manage stress, such as exercise, meditation, or spending time with friends and family.
  • Consult with a healthcare professional: If you are concerned about your BMI or maintaining a healthy weight, talk to your doctor or a registered dietitian for personalized advice and guidance.