BMI Calculator - Calculate Body Mass Index Online Free
Free BMI calculator to check your Body Mass Index instantly. Get personalized health recommendations, ideal weight range, and understand your health risk level.
BMI Calculator
Understanding BMI
Body Mass Index (BMI) is a simple calculation using a person's height and weight. It's widely used as a screening tool to identify potential weight problems in adults.
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 - 24.9 | Normal weight |
| 25 - 29.9 | Overweight |
| 30 - 34.9 | Obese (Class I) |
| 35 - 39.9 | Obese (Class II) |
| 40 and above | Obese (Class III) |
Frequently Asked Questions
What is BMI and why is it important?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It helps identify if you are underweight, normal weight, overweight, or obese. It's a useful screening tool for potential health risks.
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by your height in meters squared. The formula is: BMI = weight (kg) / height² (m²). For example, a person weighing 70 kg and 1.75 m tall has a BMI of 22.9.
What is a healthy BMI range?
A healthy BMI range is 18.5 to 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is classified as obese. However, BMI should be considered alongside other health factors.
Is BMI accurate for everyone?
BMI may not be accurate for athletes (high muscle mass), elderly people (muscle loss), pregnant women, or children. It doesn't distinguish between muscle and fat mass. Consult a healthcare provider for a complete assessment.
What are the health risks of high BMI?
High BMI increases risk of heart disease, type 2 diabetes, high blood pressure, certain cancers, sleep apnea, and joint problems. Maintaining a healthy BMI can significantly reduce these risks.
How can I lower my BMI?
To lower BMI, focus on a balanced diet with reduced calories, regular physical activity (at least 150 minutes/week), adequate sleep, stress management, and consulting healthcare professionals for personalized guidance.