How to Use the BMI Calculator: A Complete Guide
Body Mass Index (BMI) is a simple measure that uses your height and weight to work out if your weight is healthy. The BMI calculation divides an adult's weight in kilograms by their height in metres squared.
The formula is: BMI = weight (kg) / height² (m²). For example, if you weigh 70 kg and are 1.75 m tall, your BMI = 70 / (1.75)² = 22.86.
BMI Categories: Underweight (BMI < 18.5), Normal weight (18.5–24.9), Overweight (25–29.9), Obese (BMI ≥ 30).
BMI is a useful screening tool but it doesn't directly measure body fat. Very muscular people may have a high BMI but low body fat. For a more complete picture, use our Body Fat Calculator alongside BMI.
To use the BMI Calculator in Zoma Calculator: 1) Open the Health & Fitness category, 2) Click on BMI Calculator, 3) Enter your weight and height, 4) The result appears instantly with your category.
For best results, weigh yourself in the morning before eating, and measure your height without shoes. Track your BMI over time to monitor changes.