BMI Calculator

About BMI Calculator

The BMI (Body Mass Index) Calculator is a simple tool that helps you check whether your weight is healthy for your height. It uses a mathematical formula (BMI = frac Weight (kg) / Height (m)^2) to estimate body fat and can be applied to adults of all ages. While BMI does not measure body fat directly, it’s widely used to classify weight ranges and assess potential health risks.

How to Use the BMI Calculator?

Using our BMI Calculator is quick and easy. Just follow these steps:

1. Enter your height in centimeters or feet/inches.
2. Enter your weight in kilograms or pounds.
3. Click the “Calculate BMI” button to see your BMI result instantly.
4. Review the BMI category to see if you fall into underweight, normal, overweight, or obese ranges.

BMI Categories

1. Underweight (BMI < 18.5)

   A BMI below 18.5 suggests you are underweight and may need to gain weight for better health.

2. Normal Weight (18.5 – 24.9)

   This is considered a healthy range and indicates a good balance between height and weight.

3. Overweight (25 – 29.9)

   A BMI in this range means you may have excess weight, which can increase health risks over time.

4. Obese (30+)

   A BMI over 30 indicates obesity, which is associated with higher chances of developing chronic conditions such as diabetes or heart disease.

FAQ

What is the formula for BMI?

The BMI formula is weight (kg) divided by height (m) squared. In imperial units, it’s calculated as weight (lbs) divided by height (in) squared

What is a healthy BMI range?

A healthy BMI typically falls between 18.5 and 24.9. This range is associated with the lowest health risks.

Can BMI be inaccurate?

Yes, BMI does not differentiate between muscle and fat. Athletes may have a high BMI due to muscle mass, not excess fat.

Does BMI apply to children?

For children and teenagers, BMI is adjusted for age and sex, so it’s interpreted differently than for adults.

How often should I check my BMI?

Checking your BMI once every few months is sufficient unless you are actively changing your diet or exercise routine.

Test Cases for Verification

Use these test cases to verify the calculator works correctly with different units: