BMI Calculator
Calculate your Body Mass Index and see which weight category you fall into.
What is BMI?
Body Mass Index (BMI) is a simple screening measurement that estimates whether your weight is healthy relative to your height. It's calculated as weight in kilograms divided by height in meters squared (kg/m²). While BMI does not directly measure body fat and doesn't account for muscle mass, it remains a widely used starting point for assessing weight-related health risk.
BMI categories for adults
- Below 18.5 — Underweight
- 18.5 – 24.9 — Normal weight
- 25 – 29.9 — Overweight
- 30 and above — Obese
Limitations
BMI is a general guideline, not a diagnosis. Athletes with high muscle mass, older adults, pregnant women, and children may need different interpretations. Always consult a healthcare professional for personalized advice.
Frequently asked questions
Is BMI accurate for everyone?
BMI is a useful screening tool for most adults, but it doesn't distinguish muscle from fat. It can overestimate body fat in muscular athletes and underestimate it in older adults with low muscle mass, and it isn't designed for children, pregnant women, or bodybuilders.
What's a healthy BMI range?
For most adults, 18.5-24.9 is considered a normal weight range. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is classified as obese. These ranges are general guidelines, not a diagnosis.
Should I use BMI alone to judge my health?
No - BMI is best used alongside other measures like waist circumference, body fat percentage, and a checkup with a healthcare provider, since it doesn't account for body composition or fat distribution.