Calculator
BMI Calculator
Free online BMI (Body Mass Index) calculator. Enter your height and weight to get your BMI value, see your weight category, and view the healthy weight range for your height.
Your BMI
22.5
Healthy
Healthy weight for this height： 53.5–69.4 kg
| Category | BMI |
|---|---|
| Underweight | < 18.5 |
| Healthy | 18.5 – 24 |
| Overweight | 24 – 27 |
| Obese I | 27 – 30 |
| Obese II | 30 – 35 |
| Obese III | ≥ 35 |
Categories follow Taiwan MOHW standards. BMI is not suitable for pregnant women, under-18s or athletes — for reference only.
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How to use
- 1Enter your height in cm.
- 2Enter your weight in kg.
- 3See your BMI and category instantly.
- 4Check the healthy weight range for your height.
FAQ
How is BMI calculated?
BMI = weight(kg) ÷ height(m) squared. For 65 kg and 170 cm: 65 ÷ (1.7×1.7) ≈ 22.5.
What BMI is healthy?
A BMI of 18.5–24 is generally considered healthy; 24–27 is overweight and 27+ is obese, while under 18.5 is underweight.
Is BMI accurate for everyone?
BMI is a quick screening tool but doesn't suit pregnant women, under-18s, athletes or very muscular people. Pair it with body-fat and professional assessment.