Free Online BMI Calculator 2025

Measure your body mass index and understand what it means for your health

Calculator
Use this free online tool to measure your body mass index and understand what it means for your health

Body Mass Index (BMI) Calculator

Calculate your Body Mass Index (BMI) to assess if your weight is in a healthy range for your height. BMI is a screening tool that can indicate whether you may have weight-related health risks.

BMI Calculator
Calculate your Body Mass Index (BMI) to assess if your weight is healthy for your height

Enter your height in centimeters

Enter your weight in kilograms

Understanding Your BMI Results

BMI is a calculation that uses your height and weight to estimate how much body fat you have. While BMI doesn't directly measure body fat, it provides a reasonable indicator for most people and is used to identify possible weight problems.

Underweight (BMI below 18.5)

Being underweight can indicate malnutrition or other health problems. If you're underweight, consider consulting with a healthcare provider to determine if there's an underlying condition.

Normal weight (BMI 18.5-24.9)

A BMI in this range suggests that your weight is healthy for your height. Maintain a balanced diet and regular physical activity to stay in this range.

Overweight (BMI 25-29.9)

Being overweight may increase your risk of health problems. Consider making lifestyle changes such as improving your diet and increasing physical activity.

Obesity (BMI 30 and above)

Obesity significantly increases your risk for various health conditions. It's recommended to consult with healthcare providers about weight management strategies.

Limitations of BMI

While BMI is a useful screening tool, it has several limitations:

  • It doesn't distinguish between fat, muscle, and bone mass
  • It doesn't account for where fat is stored in the body
  • It may not be accurate for athletes, elderly people, or pregnant women
  • BMI categories may not be appropriate for all ethnic groups

For a comprehensive health assessment, BMI should be considered alongside other factors such as waist circumference, blood pressure, cholesterol levels, blood sugar, family history, and lifestyle factors.

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About This Calculator

Our free online bmi calculator helps you measure your body mass index and understand what it means for your health. This tool is completely free to use and provides accurate results based on the latest 2025 data and formulas.

Why Use Our BMI Calculator in 2025?

  • Updated for 2025: Includes the latest data, rates, and formulas
  • Free to Use: No hidden fees or subscriptions required
  • Easy to Use: Simple interface designed for users of all experience levels
  • Accurate Results: Calculations based on the latest data and formulas
  • Privacy-Focused: We don't store your calculation data
  • Mobile-Friendly: Use on any device, anywhere

How to Use This Calculator

Simply enter your information in the fields provided, and the calculator will instantly generate results based on your inputs. You can adjust your inputs to see how different scenarios affect the outcome.

Frequently Asked Questions

For answers to common questions about this calculator, please refer to our FAQ section above. If you have additional questions, feel free to contact us.