Health & fitness
BMI Calculator
Calculate your Body Mass Index (BMI) from height and weight. Get instant WHO health weight categories, ideal weight ranges & tips on 1CalcHub.
Interactive calculator
Check Your Body Mass Index (BMI)
Verify adult BMI (supporting standard or ethnic Asian parameters) or pediatric growth percentiles for children and teens.
Results
BMI Value
23.5
Weight Category
Normal Weight
Healthy Weight Range
53.5 kg - 72 kg
Personalized Assessment
What does my BMI mean?
Congratulations! Your BMI is in the healthy range. Maintaining a healthy weight decreases the risk of metabolic issues, heart strains, and vascular blockages.
How to use it
- 01Enter your height in centimeters and weight in kilograms.
- 02The calculator converts height to meters automatically and computes BMI.
- 03Review the category label to see where the result sits on the standard scale.
Result guide
- BMI below 18.5 is typically classified as underweight.
- BMI from 18.5 to 24.9 is commonly treated as the normal range.
- Higher ranges may indicate overweight or obesity and should be interpreted with context.
About this calculator
BMI is a quick screening metric used to compare body weight with height. It is widely understood, easy to calculate, and useful for broad health conversations.
It is still only one input. BMI does not directly measure muscle mass, body composition, or medical history, so it works best as a first check rather than a full diagnosis.
Frequently asked questions
What is BMI and what does it measure?
Body Mass Index (BMI) is a simple mathematical ratio used to estimate general body fat categories by comparing an individual's weight against their height. The metric is calculated by dividing weight in kilograms by the square of height in meters (BMI = kg / m^2). For instance, an adult weighing 75 kg with a height of 1.75 meters (175 cm) has a computed BMI of 24.49, which falls within the healthy category.
What is a healthy BMI range for adults?
According to international health standards, a healthy and normal BMI range for adults aged 20 and older is between 18.5 and 24.9. A BMI below 18.5 is categorized as underweight, a BMI from 25.0 to 29.9 is classified as overweight, and a BMI of 30.0 or higher is defined as obese. For example, a person who is 1.8 meters tall (180 cm) should ideally maintain a body weight between 60 kg and 80.6 kg to stay within the healthy BMI range.
Is BMI the same for men and women?
The mathematical formula to calculate BMI is identical for both men and women and does not change based on sex. However, the interpretation of BMI in terms of health risks can differ because women naturally tend to carry a higher body fat percentage than men at the same BMI value. For example, a man and a woman who both have a BMI of 23.5 are both classified as normal weight, but their body composition can be significantly different.
Does BMI account for muscle mass?
No, the standard BMI formula does not differentiate between fat tissue, lean muscle mass, bone density, and water weight. Because muscle is denser than fat, highly muscular individuals, such as bodybuilders or athletes, can have a high BMI of 26 or more (classifying them as overweight) even though they have a low body fat percentage and are in excellent physical condition.
What are the BMI categories per WHO classification?
The World Health Organization (WHO) establishes four major weight categories based on adult BMI values: Underweight (BMI less than 18.5), Normal Weight (BMI 18.5 to 24.9), Overweight (BMI 25.0 to 29.9), and Obese (BMI 30.0 or higher). Obesity is further split into Class I (30.0 to 34.9), Class II (35.0 to 39.9), and Class III (40.0 or greater). For example, a BMI of 32.5 is classified as Class I Obesity.
Method and limitations
This calculator uses the formula and assumptions described on this page. We do not claim independent professional review. Direct references will be listed here when they support a specific rule or data source used by this calculator.
Results are estimates for general information. Verify current rules and assumptions before making financial, tax, or health decisions.
Read our Editorial and Verification Policy →Related calculators
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