SuperCalc

Check BMI

Check your BMI in seconds — just enter your weight and height. The calculator instantly shows your BMI value, which health category you fall into, a visual gauge showing where you land on the spectrum, and the healthy weight range for your height. Supports both metric (kg/cm) and imperial (lbs/ft+in) units.

BMI Calculator

Enter your height and weight to calculate your Body Mass Index.

cm
kg

BMI Categories

WHO classification of Body Mass Index ranges.

CategoryBMI Range
Underweight
< 18.5
Normal
18.5 – 24.9
Overweight
25 – 29.9
Obese I
30 – 34.9
Obese II
35 – 39.9
Obese III
40+

Frequently Asked Questions

How do I check my BMI?
Enter your weight and height in the calculator above. Choose metric (kg and cm) or imperial (lbs and feet/inches). Your BMI is calculated instantly — no buttons to press. The result shows your number, category, and a visual gauge.
What does my BMI number mean?
Below 18.5: underweight. 18.5–24.9: healthy weight. 25–29.9: overweight. 30+: obese. These categories are based on WHO guidelines and reflect population-level health risk. Your individual health depends on many factors beyond this single number.
How often should I check my BMI?
There's no strict schedule. Checking every few months is reasonable if you're working on weight management. For general health monitoring, checking 1–2 times per year (or at annual checkups) is sufficient. Daily weight fluctuations of 1–2 kg are normal and don't meaningfully change your BMI.

Medical disclaimer: BMI is a screening tool, not a medical diagnosis. It does not measure body fat directly and does not account for muscle mass, bone density, age, sex, or ethnicity. Consult a healthcare provider for personalized health advice.

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