🫁 BMI Calculator

Calculate your Body Mass Index

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What is BMI?

Body Mass Index (BMI) is a simple calculation using your height and weight to determine if you're at a healthy weight for your height. It's a widely used screening tool to identify possible weight problems in adults.

BMI Formula

Metric Formula: BMI = weight(kg) / height(m)²

Imperial Formula: BMI = 703 × weight(lbs) / height(inches)²

The formula divides your weight by your height squared to give a numerical value that falls into one of several categories.

BMI Categories

Underweight Less than 18.5
Normal Weight 18.5 - 24.9
Overweight 25 - 29.9
Obesity 30 or greater

Why Calculate Your BMI?

  • Quick health screening tool
  • Track weight changes over time
  • Identify potential health risks
  • Set realistic fitness goals
  • Monitor children's growth patterns

Frequently Asked Questions

Is BMI accurate for everyone?

BMI is a useful screening tool but has limitations. It doesn't account for muscle mass, bone density, or fat distribution. Athletes may have higher BMIs due to muscle weight.

What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered healthy for most adults. However, ideal weight varies based on age, gender, and body composition.

How often should I check my BMI?

Check your BMI monthly if you're working toward weight goals, or quarterly for general health monitoring.