Free Online BMI Calculator

About This Tool

Our advanced BMI Calculator is a comprehensive online tool designed by health experts to help you assess your body mass index and overall health metrics. It calculates BMI using weight and height, categorizes your weight status, estimates basal metabolic rate (BMR) with age and gender, and provides an ideal weight range based on established formulas like Harris-Benedict and Devine. This tool empowers users to monitor their fitness, identify potential health risks such as obesity or underweight conditions, and make informed decisions about diet and exercise. Whether for personal wellness, weight management, or medical screening, it follows guidelines from organizations like CDC and WHO for accuracy.

How to Use the BMI Calculator

  1. Enter your weight and select the unit (kg or lbs).
  2. Enter your height and select the unit (cm or inches).
  3. Input your age in years.
  4. Select your gender (male or female).
  5. Click 'Calculate BMI' to process the information.
  6. Review the results including BMI, category, BMR, and ideal weight.
  7. Use the insights to consult with a healthcare professional if needed.

FAQs

What is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women.

How is BMI calculated?

BMI is calculated by dividing your weight in kilograms by the square of your height in meters.

What are the BMI categories?

Underweight: BMI less than 18.5, Normal weight: 18.5–24.9, Overweight: 25–29.9, Obesity: BMI of 30 or greater.

Why use BMI?

BMI is an inexpensive and easy screening method for weight category that may lead to health problems.

Is BMI accurate for everyone?

BMI does not distinguish between body fat and muscle mass, so it may not be accurate for athletes or those with high muscle mass.

What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic functions at rest.

How does age and gender affect BMI calculations?

While BMI itself doesn't use age or gender, advanced tools use them for BMR and ideal weight estimates.

What are the health risks of high BMI?

High BMI can increase the risk of heart disease, diabetes, and certain cancers.

Can BMI be used for children?

BMI for children is calculated similarly but interpreted using age- and sex-specific percentiles.

How can I improve my BMI?

Maintain a balanced diet, exercise regularly, and consult a healthcare professional for personalized advice.