BMI stands for Body Mass Index, a simple measure based on height and weight.

How is BMI calculated?

BMI is calculated as weight in kilograms divided by height in meters squared.

What are BMI categories?

Common categories are underweight, normal, overweight, and obese.

Is BMI accurate for athletes?

BMI can overestimate body fat for athletes with higher muscle mass.

Can BMI be used for children?

BMI for children is interpreted differently and uses age-specific percentiles.

Home
Utilities & Converters
BMI Calculator

BMI Calculator – Free Online Calculator

Calculate your Body Mass Index quickly and understand your weight category.

SEO Instructions

Enter your height and weight to get your BMI and a clear category. This free online BMI calculator is fast, private, and accurate.

Height (cm)

Weight (kg)

How this calculator works

The calculator uses your height and weight to compute BMI and classify the result into standard weight ranges.

Formula explanation

BMI = weight (kg) / height (m)². For example, 70 kg and 1.70 m gives BMI 24.2.

FAQs

Use this free online BMI calculator to check your body mass index, weight category, and health range. Ideal for quick BMI checks at home or on the go.

Related Articles & Guides

Expand your knowledge with our expertly curated resources.

January 23, 2026

Regular Expressions 101: A Beginner's Guide

Regex looks intimidating but is incredibly powerful. Master the basics and validate emails, URLs, and more with confidence.

January 21, 2026

How to Split a PDF into Separate Chapters or Sections

Got a 200-page PDF but only need pages 45-60? Learn how to extract exactly what you need without expensive software.

January 10, 2026

PDF vs. Word: Which Format is Best for Resumes?

Sending your CV? Don't let a formatting error cost you the job. Discover why recruiters prefer PDF and when you might actually need a Word doc.