BMI Calculator

Enter your weight and height to calculate your Body Mass Index (BMI) and determine your weight category.

BMI Calculator Overview

Inputs:
  • Weight (kg)
  • Height (cm)
Output:

Your BMI value and weight category (Underweight, Normal, Overweight, or Obese).

Formula:

BMI = weight (kg) / (height (m)²)

Note: Height is converted from cm to meters (height in cm / 100).

How to Use the BMI Calculator

Follow these simple steps to calculate your BMI:

  1. Enter your current weight in kilograms (kg).
  2. Enter your height in centimeters (cm).
  3. Click the "Calculate" button to see your result.

Understanding Your BMI Results

Your BMI result is a number that categorizes your weight status. Here’s what the numbers mean:

  • Below 18.5: Underweight
  • 18.5 – 24.9: Healthy Weight
  • 25.0 – 29.9: Overweight
  • 30.0 and Above: Obesity

While BMI is a useful screening tool, it does not distinguish between fat and muscle mass. For a more complete picture of your health, consider using our Body Fat Calculator.

Understanding BMI

What Your BMI Means for Your Health

Body Mass Index (BMI) is a simple tool to assess whether your weight is healthy for your height. It’s widely used by healthcare professionals to screen for potential health risks associated with being underweight, overweight, or obese.

  • Underweight (BMI < 18.5): May indicate malnutrition or other health issues. Consult a doctor for advice.
  • Normal (BMI 18.5–24.9): Indicates a healthy weight range. Maintain your lifestyle to stay in this category.
  • Overweight (BMI 25–29.9): May increase the risk of health issues like heart disease. Consider lifestyle changes.
  • Obese (BMI ≥ 30): Higher risk of serious health conditions. Seek professional guidance for weight management.

Frequently Asked Questions

Body Mass Index (BMI) is a measure of body fat based on your weight and height. It is calculated as weight (kg) divided by the square of height (m²). BMI is used to categorize individuals into weight categories such as Underweight, Normal, Overweight, and Obese.

BMI is calculated using the formula: BMI = weight (kg) / (height (m)²). For example, if your weight is 70 kg and your height is 1.75 m, your BMI is 70 / (1.75 * 1.75) = 22.86, which falls in the Normal category.

BMI categories are: Underweight (below 18.5), Normal (18.5–24.9), Overweight (25–29.9), and Obese (30 and above). These categories help assess whether your weight is within a healthy range for your height.

BMI does not account for muscle mass, bone density, or overall body composition. For example, athletes with high muscle mass may have a high BMI but low body fat. It’s best used as a general guideline rather than a definitive measure of health.

To improve your BMI, focus on a balanced diet and regular exercise. If your BMI is high, consider reducing calorie intake and increasing physical activity. If it’s low, focus on gaining healthy weight through nutrient-dense foods and strength training. Always consult a healthcare professional for personalized advice.

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