Understand the formula
See how metric weight and height combine into a BMI value.
Calculators TOOL
BMI Calculator
Calculate BMI from metric measurements and see the standard weight category.
Calculator guide
Calculate BMI from metric height and weight
Enter weight in kilograms and height in centimeters to calculate body mass index. Toolyma displays the BMI rounded to one decimal place and a standard category label.
BMI is a screening measure, not a diagnosis. Individual health assessment should consider age, body composition, medical history and professional advice.
How to use BMI Calculator
- Enter weight in kilograms.Type the current weight as a metric value.
- Enter height in centimeters.Add the person’s height without shoes.
- Read the BMI.The calculator divides weight by height in meters squared.
- Interpret cautiously.Use the category as general information, not as an individual medical conclusion.
Practical ways to use this calculator
Track a general measure
Compare values over time while remembering that BMI has limitations.
Prepare a discussion
Bring the result to a qualified professional when health advice is needed.
Check a sample calculation
Verify a BMI exercise or educational example quickly.
Accuracy, privacy and limitations
- Metric units: the tool accepts kilograms and centimeters.
- Adult categories: labels use common adult thresholds: under 18.5, 18.5–24.9, 25–29.9 and 30 or above.
- Not a diagnosis: BMI does not directly measure body fat, fitness or overall health.
- Special populations: children, adolescents, pregnancy and some athletic body types require different interpretation.
Frequently asked questions
How is BMI calculated?
Weight in kilograms is divided by height in meters squared.
Which units can I use?
This version uses kilograms for weight and centimeters for height.
What categories are displayed?
Underweight, Healthy range, Overweight and Obesity range using common adult thresholds.
Is BMI a medical diagnosis?
No. It is a screening measure and should not replace professional advice.
Are my measurements stored?
No. The browser performs the calculation locally.