BMI Calculator
Enter your weight and height to calculate your Body Mass Index.
BMI Calculator
A BMI Calculator is used to estimate body fat based on a person’s height and weight. BMI, or Body Mass Index, is a commonly used screening tool that helps categorize weight status for adults.
While BMI does not directly measure body fat, it provides a simple way to assess whether a person’s weight is within a healthy range.
What Is BMI (Body Mass Index)?
Body Mass Index (BMI) is a numerical value calculated using height and weight. It is widely used in healthcare and fitness settings to classify weight status.
BMI is intended for:
- Adults aged 18 and older
- General health screening
- Population-level assessments
It is not a diagnostic tool but can indicate potential health risks.
What the BMI Calculator Does
The BMI Calculator allows you to:
- Calculate BMI using height and weight
- Instantly see your BMI value
- Identify your BMI category
- Avoid manual calculations
The calculator supports both metric and imperial measurements.
BMI Formula
Metric Formula
BMI = weight (kg) ÷ height² (m²)
Imperial Formula
BMI = (weight (lb) ÷ height² (in²)) × 703
The calculator applies the correct formula automatically based on the units entered.
Example BMI Calculation
Example (Metric):
- Weight: 70 kg
- Height: 1.75 m
Calculation:
BMI = 70 ÷ (1.75 × 1.75) = 22.86
Result:
BMI ≈ 22.9
BMI Categories
BMI values are grouped into standard categories:
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and above | Obese |
These categories help assess general health risk.
How BMI Is Commonly Used
BMI is often used for:
- Health and wellness screening
- Fitness tracking
- Medical assessments
- Public health research
Healthcare professionals may use BMI alongside other measurements for better accuracy.
Limitations of BMI
BMI does not account for:
- Muscle mass
- Bone density
- Body fat distribution
- Age or gender differences
As a result, athletes or muscular individuals may have a high BMI without excess body fat.
Why Use a BMI Calculator?
Using a BMI Calculator provides:
- Quick and consistent results
- Easy-to-understand categories
- No manual math
- A starting point for health discussions
It is a helpful first step in understanding weight-related health indicators.
Notes on Accuracy
- BMI is most accurate for adults
- Results may vary based on measurement precision
- Always consult a healthcare professional for medical advice
Summary
The BMI Calculator offers a simple and efficient way to calculate Body Mass Index using height and weight. While BMI has limitations, it remains a widely used tool for identifying potential weight-related health risks.
Use the BMI Calculator as a general guide and consult professionals for personalized health assessments.