FUSIONGYM

BMI Calculator

Know your numbers. Understand your body. Start making real progress.

Calculate Your BMI

cm
kg
yrs
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UnderweightNormalOverweightObese

Understanding BMI

Body Mass Index (BMI) is calculated using your height and weight. It gives a quick snapshot of whether you're in a healthy weight range for your height.

Under 18.5Underweight — may need more nutrition
18.5 – 24.9Normal weight — healthy range
25.0 – 29.9Overweight — lifestyle changes help
30.0 and aboveObese — professional guidance recommended

BMI is a screening tool, not a diagnosis. Muscle mass, bone density, and distribution of fat are not captured. Our trainers provide a complete fitness assessment for a full picture.

Track Your Weight Over Time Start Your Transformation

BMI FAQ

Is BMI accurate for athletes?

Not always. Athletes with high muscle mass may show a higher BMI while still being very healthy. A body composition test is better for athletes.

How often should I check BMI?

Once every 2–4 weeks is enough. BMI changes slowly. For day-to-day tracking, use our Weight Tracker to monitor trends.

How do I improve my BMI?

A combination of consistent exercise and a balanced diet is most effective. Our trainers build personalised plans to help you reach your ideal range.