Educational tool — not a diagnosis. VivMetric calculators estimate body and fitness metrics using CDC, WHO, and NIH reference formulas. They do not provide medical advice, diagnosis, or treatment.
Always consult a licensed healthcare provider for medical concerns. If you are in emotional distress or thinking about harming yourself, contact the 988 Suicide & Crisis Lifeline (call or text 988, US, 24/7) or see the WHO mental-health resources.
Four-Metric Body Comparison
Doctors increasingly pair BMI with waist measurements because where you store fat matters as much as how much. This tool shows all four classifications at once and tells you whether the signals agree.
What the four metrics measure
BMI estimates weight-for-height; waist-to-height (threshold 0.50) captures central fat relative to height; waist-to-hip uses WHO central-obesity thresholds (0.90 men / 0.85 women); body fat uses ACE ranges.
What does it mean if the metrics disagree?
Mixed signals are common and informative. A muscular athlete may have an overweight BMI but healthy waist and body fat. A normal-BMI person with a high waist-to-height ratio may have hidden central fat.
Frequently Asked Questions
Which single metric is most accurate?
No single metric is perfect. Waist-to-height ratio is a strong, cheap predictor of cardiometabolic risk; body fat is the most direct fat measure; BMI is the most standardized. Use two or three together.
Is waist-to-height ratio better than BMI?
Research suggests waist-to-height ratio predicts cardiometabolic risk more consistently across body types and ethnic groups than BMI - but it still works best combined with other measures.
This tool provides educational health metric estimations only. It is not medical advice, diagnosis, or treatment. Always consult a licensed healthcare provider for medical concerns.