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bmi calculator

Free online BMI calculator to easily calculate your body mass index. Whether you are checking your overweight status or determining your ideal BMI range, our tool provides an accurate calculation based on your height and weight. It is perfect for everyone and is the go-to tool to know your body mass index!

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Body Mass Index

Underweight

Normal

Overweight

Obesity

Body Mass Index (BMI) 24.2 kg/m2
BMI Category Healthy weight
Healthy BMI range 18.5 kg/m2 - 25 kg/m2
Healthy weight for the height 135.1 lbs - 182.6 lbs
Gain to reach a BMI of 18.5 kg/m2 -
Lose to reach a BMI of 25 kg/m2 -
Ponderal Index 13.27 kg/m3

What Does My BMI Number Mean?
Body mass index (BMI) is a measure of your weight relative to your height.

For all men and women 20 years old and older, the BMI measurement is classified into one of four main weight categories:

Below 18.5: Underweight
18.5 – 24.9: Healthy Weight
25.0 – 29.9: Overweight
30.0 and above: Obesity
People of Asian descent may have greater health risks at a lower BMI. People in this group may be placed in the overweight range if their BMI is between 23 and 25 and may have obesity if their BMI is 25 or greater.

 

BMI is calculated differently for kids. For children and teens under age 20, BMI is a percentile ranking that compares children of the same age and sex. This is because a child’s body fat makeup differs between boys and girls and changes often as they grow. There are four percentile rankings:

Less than 5th percentile: Underweight
5th percentile to less than 85th percentile: Healthy weight
85th percentile to less than 95th percentile: Overweight
Equal to or greater than the 95th percentile: Obesity

 

Section Content
BMI Calculator The Body Mass Index (BMI) Calculator can be used to calculate BMI value and corresponding weight status while taking age into consideration.
Usage Use the “Metric Units” tab for the International System of Units or the “Other Units” tab to convert units into either US or metric units.
Additional Calculation The calculator also computes the Ponderal Index in addition to BMI.
BMI Introduction BMI is a measurement of a person’s leanness or corpulence based on their height and weight, categorizing weight status: underweight, normal, overweight, obese.
BMI Table for Adults Classification
BMI Chart for Adults Graph of BMI categories based on WHO data with subdivisions.
BMI Table for Children and Teens Category
BMI Chart for Children and Teens CDC BMI-for-age percentiles growth charts.
Risks of Being Overweight Risks include high blood pressure, diabetes, heart disease, stroke, sleep apnea, certain cancers, low quality of life, and mental illnesses.
Risks of Being Underweight Risks include malnutrition, osteoporosis, decreased immune function, growth issues, reproductive issues, and potential complications from surgery.
Limitations of BMI BMI does not account for body composition and can be influenced by factors like age, sex, and muscle mass.
BMI Formula USC: BMI = 703 × (mass (lbs) / height² (in))
SI: BMI = mass (kg) / height² (m)
BMI Prime BMI prime = BMI / 25
Classification based on BMI prime:
Severe Thinness
Ponderal Index PI = mass (kg) / height³ (m)
More reliable for very tall or short individuals compared to BMI.