BMI Calculator
Calculate your BMI and understand your healthy weight range based on WHO standards. Free online body mass index calculator.
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Calculate your BMI using age, height and weight in kg or lb. Get your BMI category, BMR, daily calorie needs and personalized health insights.
This BMI calculator provides estimates for educational and informational purposes only. It is not a medical diagnosis or a substitute for professional medical advice. Consult a qualified healthcare professional for personalized guidance.
Body Mass Index (BMI) is a commonly used screening measurement that compares a person's weight with their height. A BMI calculator can help you understand which general BMI category your measurement falls into.
BMI is calculated from your weight and height. This calculator supports both metric measurements, such as kilograms and centimeters, and imperial measurements, such as pounds and inches.
BMI can be useful as a general screening tool, but it does not directly measure body fat and does not account for every aspect of an individual's health or body composition.
This free BMI calculator can be used by both men and women to calculate Body Mass Index from height and weight. Enter your measurements and select the appropriate unit system to get your BMI result.
Gender is not part of the standard adult BMI formula because BMI is calculated from height and weight. However, gender and age can be used by this calculator for additional BMR and calorie estimates.
Enter your weight and height using metric (kg and cm) or imperial (lb and in) units.
Enter your age and select your gender for additional BMR and calorie estimates.
Optionally enter target weight, body fat percentage, and waist circumference when available.
Click Calculate to instantly see your BMI, BMI category, BMR, daily calorie estimate, and available health insights.
If you use the metric system, enter your weight in kilograms and your height in centimeters. The calculator converts the height measurement to meters before calculating BMI.
The standard metric BMI formula is:
BMI = Weight (kg) ÷ Height² (m)
| BMI Range | General Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and above | Obesity |
These categories are general adult screening ranges. BMI interpretation can vary depending on individual circumstances, body composition, age, and other health factors.
BMI and BMR are different measurements. BMI compares body weight with height, while BMR estimates the energy your body needs to perform basic functions while at rest.
This calculator combines BMI with additional information such as age, gender, weight, and height to provide BMR and estimated daily calorie information.
Yes. This BMI calculator is free to use. You can calculate BMI using your height and weight without a paid subscription. The calculator also provides additional BMR, calorie, and body measurement estimates.
BMI is a general screening measurement and does not directly measure body fat. It also does not fully account for muscle mass, body composition, body type, or individual medical conditions.
Use your BMI result as general information rather than a medical diagnosis. If you have concerns about your weight, nutrition, or health, speak with a qualified healthcare professional.
A BMI calculator estimates your Body Mass Index using your weight and height. BMI is commonly used as a screening measure to compare body weight with height and identify general BMI categories such as underweight, healthy weight, overweight, and obesity.
To calculate BMI using kilograms and centimeters, enter your weight in kilograms and height in centimeters. The calculator converts the height to meters and uses your weight and height to calculate BMI. The standard metric BMI formula is weight in kilograms divided by height in meters squared.
Yes. This BMI calculator can be used by adult men to calculate BMI from height and weight. You can also enter age and other available information to receive additional BMR and calorie-related estimates.
Yes. Women can use this BMI calculator by entering their height and weight. Age and gender can also be used for additional BMR and daily calorie estimates provided by the calculator.
The standard adult BMI calculation is based on height and weight and does not directly use age in the BMI formula. However, age can be useful when interpreting health measurements and when calculating other metrics such as BMR and estimated daily calorie needs.
For adults, BMI values from 18.5 to 24.9 are commonly classified as the healthy or normal-weight range. BMI below 18.5 is generally classified as underweight, while higher values fall into overweight or obesity categories. BMI is a screening measure and should not be considered a complete assessment of health.
BMI, or Body Mass Index, is a height-to-weight screening measure. BMR, or Basal Metabolic Rate, estimates the amount of energy your body requires to perform basic functions while at rest. They measure different aspects of body and energy status.
Yes. You can use the metric system with kilograms and centimeters or the imperial system with pounds and inches. Select the appropriate unit system before entering your measurements.
Yes. This BMI calculator is free to use. You can enter your measurements and calculate BMI without a paid subscription.
No. BMI is a general screening measurement and is not a medical diagnosis. It does not directly measure body fat and may not fully reflect factors such as muscle mass, body composition, age, or individual health conditions. Consult a qualified healthcare professional for personalized medical advice.