Health
BMI Calculator
Estimate your body mass index (BMI) using metric measurements and understand your category.
Calculator
Results
- Body mass index23.51
Category: Normal weight
Formula
BMI = weight (kg) ÷ height (m)2
Use this formula with the live inputs above to test scenarios instantly.
Assumptions
- BMI is a screening metric and does not directly measure body composition.
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How this formula works
BMI is a population-level screening metric derived from body mass and height. The squared height term normalizes weight across different body sizes so comparisons are more consistent than raw weight alone.
While BMI is widely used in public health workflows, it is not a direct measure of body fat or metabolic health. Treat the result as an initial signal and combine it with clinical context when making health decisions.
References & citation
Use these references when documenting assumptions, and copy the block below when citing this calculator.
- About Adult BMI
Centers for Disease Control and Prevention (CDC)
Clinical context for BMI interpretation ranges.
- Dietary Reference Intakes for Water
National Academies of Sciences, Engineering, and Medicine
Commonly cited reference for hydration baseline guidance.