BMI Calculator

**Disclaimer:** This calculator provides an estimate. Consult with a healthcare professional for accurate health advice.

Your Calculated BMI

0.0 N/A

Check the chart below for health guidelines.

BMI Categories Chart

Underweight Below 18.5
Normal weight 18.5 – 24.9
Overweight 25.0 – 29.9
Obesity 30.0 and above

What is BMI (Body Mass Index)?

BMI is a simple screening tool used to estimate a person’s body fat based on their height and weight. It is widely used by healthcare professionals to identify potential weight issues in adults.

The BMI is calculated using the formula: $$BMI = \frac{\text{weight}}{\text{height}^2}$$

While BMI is a useful, quick measure, it should not be the sole basis for determining a person's health status, as it does not account for muscle mass, bone density, or overall body composition.

Frequently Asked Questions (FAQ)

Is BMI accurate for everyone?

No. BMI can overestimate body fat in athletes and those with a muscular build, and it may underestimate body fat in older persons and others who have lost muscle mass. It is not suitable for pregnant women or children.

What does a "Normal" BMI mean?

A BMI in the "Normal" range (18.5–24.9) indicates that your weight is in a healthy proportion to your height for the majority of adults. However, health should always be assessed by a doctor.

How can I calculate BMI without an online tool?

You can use the formula: Weight in kilograms divided by the square of height in meters, or $\text{(Weight in pounds} / \text{Height in inches}^2) \times 703$ for imperial units.