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BMI Calculator - Check Body Mass Index Free Online

Want to check if your weight is healthy? Use our free BMI Calculator 2026. It calculates your Body Mass Index in 1 second and tells if you are Underweight, Normal, Overweight, or Obese.

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What is BMI?

BMI stands for Body Mass Index. It is a number calculated from a person's weight and height. WHO uses BMI to check if a person has a healthy body weight for a given height. Formula: BMI = weight(kg) / height(m)^2

How to Use BMI Calculator?

Step 1: Enter your weight in Kilograms

Step 2: Enter your height in Centimeters

Step 3: Click 'Calculate BMI'. Your BMI and health status will show instantly.

BMI Chart for Adults

Below 18.5 = Underweight

18.5 - 24.9 = Normal/Healthy

25.0 - 29.9 = Overweight

30.0 and Above = Obese

Why is BMI Important?

BMI is used by doctors to screen for weight categories that may lead to health problems. Being underweight or overweight increases risk of heart disease, diabetes, and other health issues. Checking BMI every 6 months helps you stay on track with your fitness goals.

Limitations of BMI

BMI does not measure muscle mass, bone density, age, or gender. Athletes and bodybuilders may have high BMI but be very healthy. Pregnant women and elderly people should consult a doctor instead of relying only on BMI.

How to Maintain Healthy BMI?

1. Balanced Diet: Eat fruits, vegetables, protein and avoid junk food

2. Exercise: 30 minutes walking or workout 5 days a week

3. Sleep: 7-8 hours sleep helps maintain weight

4. Water: Drink 3-4 liters water daily

FAQ - BMI Calculator

Q1: Is BMI accurate for athletes? No, BMI does not measure muscle. Athletes may show Overweight even if fit.

Q2: What is a normal BMI? 18.5 to 24.9 is considered normal for adults.

Q3: How to reduce BMI? Balanced diet and regular exercise help maintain a healthy BMI.

Q4: Is this calculator free? Yes, 100% free and no signup required.