Formula Explanation
BMI = weight(kg) / height(m)^2
BMI is a simple screening measure that compares weight to height. It does not directly measure body fat, muscle, or medical risk.
Health
BMI Calculator
The BMI calculator estimates body mass index from height and weight, then maps the result to common BMI categories.
bmibody mass indexhealthweightheightfitness
Calculator
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BMI Category Range Chart
Your BMI is compared with the standard adult BMI reference ranges.
Underweight limit18.5
Normal upper limit24.9
Overweight upper limit29.9
Your BMI23.5
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Use Cases
- Check BMI
- Compare wellness range
- Track body metrics
Step-by-Step Explanation
- Step 1Enter weight and height in either metric or imperial units.
- Step 2Convert height to meters when needed.
- Step 3Divide weight in kilograms by height in meters squared.
- Step 4Compare the BMI value to standard category ranges.
Example calculation
Example BMI calculation
Given
- Weight: 72 kg
- Height: 175 cm
Steps
- Height is 1.75 m.
- BMI = 72 / 1.75^2.
Result
BMI is 23.5, which is in the normal range.
Calculator guide
About this BMI Calculator
Calculate body mass index using metric or imperial units and view the standard BMI category. This page includes an interactive calculator, concise formula notes, worked examples, FAQs, related calculators, and practical guidance you can revisit whenever needed.
Found something that does not look right?
We work hard to keep every calculator accurate and useful. If you notice a calculation error, missing option, or unclear explanation, please let us know so we can review and correct it promptly.
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Most active date
2026-06-05
FAQ
BMI Calculator FAQs
Is BMI a medical diagnosis?+
No. BMI is a screening estimate and should not replace guidance from a medical professional.
Does BMI work for athletes?+
BMI can overestimate body fat for muscular people because it does not distinguish muscle from fat mass.
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