BMI Calculator
Calculate your Body Mass Index (BMI) to find out if your weight is healthy. Supports Imperial and Metric units.
BMI Calculator
Calculate your Body Mass Index to assess if your weight is healthy for your height
Formula
BMI = (weight × 703) / height²Where weight is in pounds and height is in inches
BMI Categories
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | Below 18.5 | Possible nutritional deficiency |
| Normal | 18.5 - 24.9 | Low risk |
| Overweight | 25 - 29.9 | Moderate risk |
| Obese | 30 and above | High risk |
How to Use
- 1Select unit system — Choose between Imperial (lbs/ft) or Metric (kg/cm) units.
- 2Enter your weight — Input your current weight in pounds or kilograms.
- 3Enter your height — For Imperial, enter feet and inches. For Metric, enter centimeters.
- 4View results — See your BMI value, category, and health recommendations.
Frequently Asked Questions
What is BMI and how is it calculated?
BMI (Body Mass Index) measures body fat based on height and weight. Formula: BMI = weight(kg) / height(m)². It provides a simple screening tool for weight categories.
What are the BMI categories?
Underweight: BMI < 18.5, Normal: 18.5-24.9, Overweight: 25-29.9, Obese: BMI ≥ 30. These help assess potential health risks.
Is BMI accurate for everyone?
BMI may overestimate body fat in athletes and underestimate it in older adults. It doesn't account for muscle mass, bone density, or fat distribution.
What is a healthy BMI range?
A healthy BMI is generally 18.5-24.9, associated with the lowest risk of weight-related health problems.