Health

BMI vs BMR: What's the Difference?

By SC Editorial 2026-06-09 6 min read

BMI (Body Mass Index) and BMR (Basal Metabolic Rate) are both health metrics, but they measure completely different things. Confusing them leads to misguided fitness and diet decisions.

What Is BMI?

BMI = weight(kg) / height(m)^2. It categorizes weight relative to height. Use our BMI Calculator to find your category: underweight, normal, overweight, or obese.

What Is BMR?

BMR is the calories your body burns at complete rest to maintain vital functions. The BMR Calculator uses the Mifflin-St Jeor equation with age, sex, weight, and height.

Key Differences

BMI is a screening tool, not a diagnosis. BMR informs calorie targets. Athletes may have high BMI due to muscle, not excess fat. Always combine metrics with professional advice.

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