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BMI 计算

计算身体质量指数（BMI）。

Features

  • Instantly calculates your Body Mass Index (BMI) with precise mathematical formulas to help you understand your current body composition.
  • Automatically categorizes your results into underweight, normal weight, overweight, or obese based on official World Health Organization guidelines.
  • Supports both metric (kilograms, centimeters) and imperial (pounds, inches) measurement units for seamless use by anyone worldwide.
  • Maintains absolute privacy by processing all health calculations locally in your browser without storing or transmitting your personal data.
  • Features a clean, mobile-responsive design that allows you to easily check and track your body mass index on any smartphone, tablet, or desktop.

How to Use

  1. Select your preferred measurement system, either metric (kg/cm) or imperial (lbs/in).
  2. Enter your current weight into the designated input field.
  3. Input your accurate height measurements to ensure the most precise calculation.
  4. Click the 'Calculate' button to instantly generate your Body Mass Index score.
  5. Review your resulting BMI score and read your personalized health category indicator.

Frequently Asked Questions

What is a healthy BMI range?

A healthy BMI range for most adults is considered to be between 18.5 and 24.9. Falling within this range is generally associated with a lower risk of weight-related health issues.

How do I calculate my BMI manually?

You can calculate your BMI using the formula: weight (kg) divided by height squared (m²). If you are using imperial measurements, the formula is: 703 multiplied by weight (lbs) divided by height squared (in²).

Is BMI accurate for athletes or muscular individuals?

BMI is a general screening tool and does not differentiate between muscle mass and body fat. Because muscle is denser than fat, highly trained athletes may register as 'overweight' on the BMI scale despite having very low body fat.

Does BMI calculation work for children and teens?

BMI is calculated the same way for children, but the results are interpreted differently. Instead of standard adult categories, a child's BMI is compared to age and sex-specific percentiles to determine their weight status.

Is it safe to use an online BMI calculator?

Yes, our online BMI calculator is completely safe because it requires no personal identification, account creation, or medical history. All calculations are performed instantly in your browser to protect your privacy.