Weight (kg)

Height (cm)

Age (optional)

Gender (optional)

—

Enter your details above

BMI Scale

Underweight
<18.5Normal
18.5–24.9Overweight
25–29.9Obese
≥30

Underweight (<18.5)

Normal (18.5–24.9)

Overweight (25–29.9)

Obese (≥30)

📊

What is BMI?

BMI is weight (kg) ÷ height² (m²). It screens for weight categories that may lead to health problems.

⚠️

BMI Limitations

BMI doesn't distinguish muscle from fat. Athletes may score high despite being healthy. Always consult a doctor.

🎯

Healthy Range

A BMI of 18.5–24.9 is considered normal for most adults. Asian populations may use lower thresholds.

Frequently Asked Questions

How is BMI calculated?+

BMI = weight (kg) ÷ height² (m²). For example: weight 70 kg, height 1.75 m → BMI = 70 ÷ (1.75²) = 70 ÷ 3.0625 ≈ 22.9, which is normal weight.

Is BMI accurate for everyone?+

BMI is a screening tool, not a diagnostic measure. It doesn't account for muscle mass, bone density, age, sex, or fat distribution. Consult a healthcare professional for a complete assessment.

What BMI is considered healthy?+

For adults, a BMI of 18.5–24.9 is normal weight. Below 18.5 is underweight, 25–29.9 is overweight, and 30+ is obese. For South Asians, healthy range is often considered 18.5–22.9.

How do I convert my height to cm?+

Multiply feet by 30.48 and add inches × 2.54. Example: 5'7" = (5 × 30.48) + (7 × 2.54) = 152.4 + 17.78 = 170.18 cm. Or use the Imperial toggle above which handles this automatically.

BMI Calculator

What is BMI?

BMI Limitations

Healthy Range

Frequently Asked Questions

Related Calculators