BMI Calculator
Check if your weight is healthy for your height
BMI
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Under<18.5NormalOver>30 Obese
⚖️ What is BMI?
Body Mass Index (BMI) is a simple screening tool using weight and height to estimate body fat levels. It's widely used as a first-step health assessment — not a diagnostic tool.
Formula: BMI = weight(kg) ÷ height²(m)
📊 BMI Categories
- Under 18.5: Underweight — consult a nutritionist
- 18.5–24.9: Normal weight ✅
- 25–29.9: Overweight — consider diet and exercise adjustments
- 30–34.9: Obese Class I
- 35+: Obese Class II/III — medical consultation recommended
⚠️ Limitations of BMI
BMI is a screening tool, not a diagnosis. It may be inaccurate for: athletes (muscle weighs more than fat), elderly people (muscle loss), pregnant women, and children. Always consult your doctor for a full health assessment.
❓ FAQ
A BMI of 18.5–24.9 is considered healthy for most adults. Below 18.5 = underweight; 25–29.9 = overweight; 30+ = obese.
No — BMI does not distinguish between muscle and fat. Athletes may have a high BMI due to muscle mass while being perfectly healthy.
BMI = weight (kg) ÷ height² (m). Example: 70kg ÷ (1.75)² = 70 ÷ 3.0625 = 22.9
This calculator is designed for adults. Children and teenagers use age- and gender-specific BMI percentiles.