What is the Bmi Calculator Metric?

The Bmi Calculator Metric is a free online tool that helps you calculate results instantly. Enter your values above and click Calculate to see results.

Is the Bmi Calculator Metric free?

Yes, the Bmi Calculator Metric is completely free to use with no registration required. You can use it as many times as you need on any device.

How accurate is this calculator?

Our Bmi Calculator Metric uses standard formulas for accurate results. For critical decisions, always verify with a qualified professional.

BMI Calculator (Metric)

Calculate your Body Mass Index using metric units — kilograms and centimeters. Get your BMI, weight category, and healthy weight range for your height. For feet/inches and pounds, use our imperial BMI Calculator.

BMI Calculator — kg / cm

Weight (kg)

Height (cm)

Age

Sex

BMI Formula (Metric)

BMI = weight (kg) / height² (m²) BMI = weight (kg) / (height_cm / 100)² Example: 70 kg, 170 cm → 70 / (1.70)² = 70 / 2.89 = 24.2

BMI Categories (WHO)

BMI Range	Category
Below 18.5	Underweight
18.5 – 24.9	Normal weight
25.0 – 29.9	Overweight
30.0 – 34.9	Obese (Class I)
35.0 – 39.9	Obese (Class II)
40.0 and above	Obese (Class III)

Frequently Asked Questions

What is a healthy BMI?+

A BMI between 18.5 and 24.9 is considered healthy weight by the WHO. However, BMI doesn't account for muscle mass, bone density, or fat distribution. Athletes may have high BMI despite low body fat. Use it as one of several health indicators.

Is BMI different for Asian populations?+

Yes. Studies show that people of Asian descent may have higher health risks at lower BMI values. Some health organizations recommend lower thresholds for Asian populations: overweight at BMI 23+ and obese at BMI 27.5+.

What BMI Measures

Body Mass Index (BMI) is a simple screening tool that uses your height and weight to estimate body fat levels. It's a population-level measurement, not a diagnostic tool — and it has well-documented limitations for individuals, particularly athletes, older adults, and people of different ethnicities.

The BMI Formula

BMI = weight (kg) / height (m)²

In US units: BMI = (weight in pounds × 703) / height in inches²

BMI categories (per CDC): Underweight: below 18.5 | Normal weight: 18.5–24.9 | Overweight: 25–29.9 | Obese: 30 and above

How to Use This Calculator

Enter your height in feet and inches (or centimeters)
Enter your weight in pounds (or kilograms)
Click Calculate to see your BMI and weight category

Example Calculations

5'6" / 150 lbs: BMI = (150 × 703) / (66²) = 24.2 — Normal weight

5'10" / 200 lbs: BMI = (200 × 703) / (70²) = 28.7 — Overweight

5'4" / 120 lbs: BMI = (120 × 703) / (64²) = 20.6 — Normal weight

Limitations of BMI

BMI doesn't distinguish between muscle and fat. A highly muscular athlete may have a BMI in the "overweight" range while being extremely healthy. BMI also doesn't account for where fat is distributed — abdominal fat carries higher health risks than fat elsewhere, and BMI doesn't capture this. Doctors use BMI as one data point alongside waist circumference, blood pressure, cholesterol, and blood glucose for a complete health picture.