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Alternatives to BMI: Better Ways to Measure Health
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Waist-to-Height Ratio: Chart & Calculator
A third alternative to BMI is measuring your waist-to-height ratio. This compares height with the circumference of the waist. Many guidelines consider a waist-to-height ratio below 0.5 to be associated with lower cardiometabolic risk, though the right target depends on the individual. A study in 2025 showed that waist-to-height ratio is a better predictor of heart disease risk than BMI.
BMI vs Body Fat Percentage: Which Is More Accurate?
The truth is, No single measurement tells the complete story of your health, and that's actually the point. BRI accounts for body shape. Body fat percentage gives you a direct look at your body composition. And waist-to-height ratio measures central obesity, which has the strongest ties to cardiovascular risk of the three. So far, studies show that waist-to-height ratio and body fat percentage are slightly stronger at predicting metabolic outcomes than BMI. But it ultimately depends on your goal. That’s why many health experts now say it’s best to use multiple metrics at once.
How Providers Use Multiple Health Metrics Together
Remember that your healthcare provider is taking all these metrics (and more) into consideration. For example, they might look at your BMI in combination with your waist circumference, blood pressure, blood glucose, cholesterol levels, and body fat percentage to assess your overall cardiometabolic health. This is especially important for patients taking weight loss medications like a GLP-1. You may see improvements in blood glucose and blood pressure even before you see results on the scale. So your provider may be tracking progress that you’re not. If you want to know which metrics your provider is using to measure your success, it’s a good idea to ask them at your next visit.
FAQs
How do I measure body fat percentage at home?
You don't need a DEXA scan or calipers anymore. Many smart scales now report body fat percentage, and there are apps and websites that calculate it from measurements of different parts of your body. These aren't as precise as clinical tools, but they're great for tracking changes over time.
What is a healthy waist-to-height ratio?
A waist-to-height ratio below 0.5 is generally considered healthy. You can calculate yours by dividing your waist circumference by your height. Some studies have shown that waist-to-height ratio might be a better predictor of heart disease risk than BMI.
Is BMI accurate?
BMI only looks at weight and height. It doesn't tell you how much of your weight is muscle vs fat, where your body stores fat, or what's going on with things like blood glucose or blood pressure. It was originally designed for measuring populations, not individuals. That's why many providers now use it alongside other metrics like body fat percentage and waist-to-height ratio to get the full picture.
How to Track your Progress on a GLP-1
If you're wondering how to track the changes in your body on a GLP-1, consider taking measurements along your journey! Losing inches indicates that you're losing body fat, even if your weight stays the same! Tracking changes in measurements can show progress that you're making, even if overall body weight isn't dropping every week. Building healthy habits like regular measurement tracking, following a weight loss diet that works for your lifestyle, and developing a healthy relationship with food can all support your journey. Talk with your healthcare provider about which measurements, if any, are appropriate for your situation.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting, stopping, or changing any medication or treatment plan.
References:
Thomas, D. M., Bredlau, C., Bosy-Westphal, A., Mueller, M., Shen, W., Gallagher, D., Maeda, Y., McDougall, A., Peterson, C. M., Ravussin, E., & Heymsfield, S. B. (2013). Relationships between body roundness with body fat and visceral adipose tissue emerging from a new geometrical model. Obesity, 21(11), 2264–2271. https://doi.org/10.1002/oby.20408
Potter, A. W., Chin, G. C., Looney, D. P., & Friedl, K. E. (2024). Defining overweight and obesity by percent body fat instead of body mass index. The Journal of Clinical Endocrinology & Metabolism, 110(4), e1103–e1107. https://doi.org/10.1210/clinem/dgae341
Mendes, T. B., Generoso, G., Fabiano, R. C., Halpern, B., Janovsky, C. C. P. S., Romero, C. M., Santos, R. D., Bensenor, I., Lotufo, P. A., & Bittencourt, M. S. (2025). Waist-to-height ratio and coronary artery calcium incidence: the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). The Lancet Regional Health - Americas, 52, 101281. https://doi.org/10.1016/j.lana.2025.101281
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