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).

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.

Explore More Health Tools

Related Calculators

Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method.

Menstrual Period Calculator

Predict your next period, ovulation, and fertile days.

Daily Water Intake Calculator

Estimate your daily water needs based on weight, activity, and climate.

Ideal Nutrition Calorie Calculator

Estimate your daily calorie needs.

Learn more about MG Calculator on our About Us page. | Have questions? Reach out via our Contact Us page.