BMI Calculator
Calculate your Body Mass Index and understand weight categories.
Personal Information
BMI Results
Your BMI
22.7
Category
Normal
Real-World Examples
See how calculations work across different profiles.
Normal BMI
150 lbs, 5'7" (170cm)
23.4
Normal range
Overweight
180 lbs, 5'8" (173cm)
27.3
Overweight range
Underweight
110 lbs, 5'5" (165cm)
18.5
Borderline
Reference Data
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Increased risk of nutrient deficiencies |
| 18.5 – 24.9 | Normal | Low health risk |
| 25.0 – 29.9 | Overweight | Moderate health risk |
| 30.0+ | Obese | High health risk |
Frequently Asked Questions
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Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a measurement of body fat based on height and weight. It is used as a screening tool to identify potential weight problems. BMI = weight(kg) / height(m).
How is BMI categorized?
Underweight: <18.5, Normal: 18.5-24.9, Overweight: 25-29.9, Obese: 30+. These are established by the WHO as screening tools, not diagnostic criteria.
Is BMI accurate for everyone?
BMI may not be accurate for athletes (high muscle mass), elderly people (low muscle mass), or pregnant women. It does not account for body composition or fat distribution.
What are the limitations of BMI?
BMI does not distinguish between lean mass and fat mass, does not account for age or gender differences, and may overestimate health risks for muscular individuals.
Should I rely on BMI alone?
No. BMI should be considered along with waist circumference, body fat percentage, blood pressure, cholesterol, and overall fitness. Consult a healthcare provider for assessment.
Educational use only. This calculator provides estimates for educational and informational purposes. It is not medical, nutritional, or dietary advice. Consult a registered dietitian or healthcare provider for personalized guidance.
Last updated: 2026 · CalorieFig Editorial Team