How to Calculate Your BMI & Why It Matters: Complete Guide with BMI Chart [2024]

By Dr. Sarah Matthews, Health Metrics Expert at CalculateHub 1/5/2024

Discover how to accurately calculate and interpret your Body Mass Index (BMI) with CalculateHub's comprehensive guide. Learn the simple formula, understand BMI categories, and find out why this important health metric matters for your overall wellness. Complete with an easy-to-use BMI chart, practical examples, and expert insights, this guide helps you make informed decisions about your health goals.

Understanding your Body Mass Index (BMI) is crucial for maintaining good health and managing weight effectively. At CalculateHub, we've created this comprehensive guide to help you calculate and interpret your BMI accurately.

What is BMI?

BMI is a numerical value calculated using your weight and height that helps assess whether you're at a healthy weight for your height. While it's not a perfect measure, it serves as a useful screening tool for weight categories that may lead to health problems.

How to Calculate Your BMI

The BMI formula is:

BMI = weight (kg) ÷ height² (m²)

For those using imperial measurements, the formula is:

BMI = (weight (lbs) × 703) ÷ height² (inches²)

Need to convert units? Our unit converter can help you switch between metric and imperial measurements easily.

Example BMI Calculation

Let's calculate the BMI for someone who weighs 70 kg and is 1.75 meters tall:

Weight: 70 kg
Height: 1.75 m
Height squared: 1.75 × 1.75 = 3.0625
BMI = 70 ÷ 3.0625 = 22.86

BMI Categories Chart

BMI Range	Weight Status
Below 18.5	Underweight
18.5 - 24.9	Normal weight
25.0 - 29.9	Overweight
30.0 and above	Obese

Why BMI Matters

BMI is an important health indicator used worldwide, from United States to Singapore. It helps:

Screen for weight categories that may lead to health problems
Track weight changes over time
Set realistic weight goals
Determine suitable fitness programs

Beyond BMI: Complete Health Assessment

While BMI is useful, it's just one part of a complete health assessment. Consider using our calorie calculator to plan your diet, and read our guide on how to calculate your body fat at home for a more comprehensive understanding of your health.

Take Action Today

Ready to take control of your health? CalculateHub offers free, accurate calculators to help you on your wellness journey. For personalized assistance, call us at or explore our most popular calculators.