With the BMI calculator you can calculate your BMI. Actually, the Body Mass Index, which is hidden behind the abbreviation BMI, is a measure for evaluating your weight in relation to your height. The BMI calculator also helps you assess your current weight based on your gender and age. BMI is calculated as follows: BMI = weight in kilograms / (height in metres)². BMI is thus measured using the International System of Units (SI) in kiolgrams and metres. Converted into Anglo-American units, the formula for BMI is: 703 × weight in lbs / (height in inches)². However, this measurement alone is not enough; the correct evaluation of the BMI, taking into account gender and age, is crucial. Only then can your weight be classified and the most important question answered: are you underweight, normal weight or overweight? The BMI calculator also helps you find your ideal weight.
The most important topics on the BMI calculator
- Input 'Help' for the BMI Calculator
- Assessment by Age and Sex
- Example of BMI Calculation
- Division into Weight Classes
- Limitations of BMI Weight Assessment
Please state your age. The assessment of your weight by BMI is age-dependent - weight usually increases with age. A slight excess of normal weight with increasing age is considered harmless, especially since a certain amount of fat is not considered unhealthy. Fat reserves protect the body in times of crisis - in old age it is important to avoid emaciation due to illnesses or a lack of appetite. For children and adolescents there are other ideal values for BMI – this calculator here is reserved for adults!
Please indicate your gender. The assessment of your weight by BMI is gender-dependent, because men have a different physique than women. Their proportion of muscle to total mass is higher than that of the female sex.
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As source for the information in the 'Body Mass Index' category, we have used in particular:
- WHO Body mass index - BMI (WHO)
- Diet and Health: Implications for Reducing Chronic Disease Risk (National Research Council (US) Committee on Diet and Health)
This page of the 'Body Mass Index' category was last edited or reviewed by Stefan Banse on February 20, 2023. It corresponds to the current status.
Changes in this category "Body Mass Index"
- Editorial revision of this page