Body Mass Index (BMI) is a number calculated from your height and weight. It is a widely used screening tool to identify whether a person is underweight, at a healthy weight, overweight, or obese. BMI does not directly measure body fat, but research shows it correlates with more direct measurements of body fat.
BMI 계산기
Use our free BMI 계산기 to get an instant, science-backed result in under 30 seconds. All calculations run entirely in your browser — no data leaves your device, no account required.
What Is BMI 계산기?
How to Calculate — The WHO Standard — weight (kg) ÷ height² (m²) Formula
We use the standard WHO formula. For metric: weight (kg) ÷ height (m)². For imperial: 703 × weight (lb) ÷ height (in)².
- Select your preferred measurement system (Metric or Imperial).
- Enter your age, gender, height, and weight accurately.
- Click calculate to see your BMI score and health category.
What Does Your Result Mean?
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Elevated — malnutrition, immune risk |
| 18.5 – 24.9 | Normal weight ✓ | Lowest all-cause mortality risk |
| 25.0 – 29.9 | Overweight | Moderate — increased risk of metabolic disease |
| 30.0 + | Obese | High — clinical intervention recommended |
Frequently Asked Questions
Is BMI accurate for athletes?
No. BMI does not account for muscle mass. Athletes with high muscle mass may be classified as overweight or obese despite having low body fat.
What is a healthy BMI?
A healthy BMI typically falls between 18.5 and 24.9 for most adults.
Does age affect BMI?
The standard BMI categories apply to adults 20 and older. However, older adults may be healthier at a slightly higher BMI (25-27) to protect against osteoporosis and frailty.
Can children use this BMI calculator?
No. Children and teens need a BMI percentile calculator that compares their score against others of the same age and gender.
Next Steps
Now that you have your bmi 계산기 result, use these tools to build a complete picture of your health metrics.
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Evidence-informed calculator · Updated August 2026
This calculator uses the stated published equation (WHO Standard — weight (kg) ÷ height² (m²)) and is for educational use. A calculator result is an estimate, not medical advice or an individual clinical assessment.
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