BMI (Body Mass Index) is a simple ratio of weight to height squared. It is used as a population-level screening tool for weight categories but has significant limitations as an individual health metric.

Is BMI accurate for muscular people?

No — BMI does not distinguish between fat mass and muscle mass. A muscular person can be classified as overweight or obese by BMI despite having very low body fat. Body fat percentage is a more useful individual metric.

What is a healthy BMI in Ireland?

The WHO healthy BMI range of 18.5-24.9 applies globally. However, Irish guidelines generally align with these thresholds, while acknowledging BMI's limitations for muscular individuals and older adults.

What is a better alternative to BMI?

Body fat percentage (estimated via skinfold calipers or DEXA scan), waist circumference, and waist-to-height ratio are all more informative individual health metrics than BMI alone.

BMI Calculator

Calculate your Body Mass Index (BMI) and understand your health category.

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