BMI Calculator
Calculate your Body Mass Index to understand your weight category
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BMI Categories
Your BMI
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How BMI (Body Mass Index) is Calculated?
BMI is a measure of body fat based on height and weight. It's widely used as a screening tool to identify potential weight problems in adults. The formula is the same for both men and women.
BMI = Weight (kg) / [Height (m)]²
For imperial: BMI = [Weight (lbs) / Height (inches)²] × 703
Where:
- Weight = Body weight in kilograms (or pounds for imperial)
- Height = Height in meters (or inches for imperial)
Example:
Let's calculate BMI for a person who weighs 70 kg and is 1.75 meters tall.
Given: Weight = 70 kg, Height = 1.75 m
Step 1: Apply the BMI Formula
BMI = Weight (kg) / [Height (m)]²
BMI = 70 / (1.75)²
BMI = 70 / 3.0625
BMI = 22.86
Result: BMI = 22.86, which falls in the "Normal weight" category (18.5 - 24.9).
BMI Categories (WHO Standard):
- Underweight: BMI < 18.5
- Normal weight: BMI 18.5 - 24.9
- Overweight: BMI 25 - 29.9
- Obese: BMI ≥ 30
Why Calculate Your BMI?
Health Screening
Identify potential weight-related health risks
Fitness Goals
Track progress in weight management programs
Medical Reference
Used by healthcare professionals worldwide
Universal Standard
WHO standard used globally for adults
Why Use Our BMI Calculator?
Instant BMI calculation
Metric and imperial units
WHO standard categories
100% free, no registration
Mobile-friendly design
Works for adults worldwide
BMI Calculator FAQs
❓What is a healthy BMI range?
A healthy BMI is between 18.5 and 24.9. This range is associated with the lowest risk of health problems.
❓Is BMI accurate for everyone?
BMI is a screening tool but may not be accurate for athletes with high muscle mass, pregnant women, or the elderly. Consult a healthcare professional for personalized assessment.
❓Can I use metric or imperial units?
Yes, our calculator supports both metric (kg, cm) and imperial (lbs, feet/inches) units. The results are identical regardless of the unit system used.
❓Is this BMI calculator free?
Yes, our BMI calculator is completely free to use with no registration required.