BMI Calculator Guide

What is BMI?

Body Mass Index (BMI) is a simple method used to estimate whether your body weight is healthy for your height. It is widely used by doctors, hospitals, fitness trainers and health organizations around the world.

BMI does not directly measure body fat, but it provides a quick indication of whether a person is underweight, healthy weight, overweight or obese.

How is BMI Calculated?

BMI = Weight (kg) ÷ Height² (m²)

Example

Weight = 70 kg
Height = 1.75 m
BMI = 22.86

BMI Categories

BMI	Category
Below 18.5	Underweight
18.5 - 24.9	Healthy Weight
25 - 29.9	Overweight
30 - 34.9	Obesity Class I
35 - 39.9	Obesity Class II
40+	Severe Obesity

Benefits of BMI Calculator

• Quick health assessment
• Tracks weight changes
• Supports fitness goals
• Useful for diet planning
• Helps identify obesity risks
• Used by healthcare professionals

Limitations of BMI

• Does not measure body fat directly.
• Does not consider muscle mass.
• Does not consider bone density.
• Does not consider age or gender.

How to Maintain a Healthy BMI

• Eat a balanced diet.
• Exercise at least 150 minutes every week.
• Drink enough water daily.
• Sleep 7–9 hours.
• Reduce stress.

Frequently Asked Questions

Is BMI accurate?

BMI is a useful screening tool but it does not directly measure body fat.

Can children use BMI?

Children use BMI-for-age charts instead of adult BMI values.

How often should I calculate BMI?

Once every month is usually sufficient.

Conclusion

BMI is a simple way to understand whether your weight is appropriate for your height. Maintain a healthy lifestyle through balanced nutrition, regular exercise and adequate sleep.