Relative Fat Mass Calculator
Simple DEXA-validated estimator of body fat percentage using height and waist
Estimated body fat percentage based on Cedars-Sinai formula
Mathematical Formula & Scientific Methodology
Formula: Woolcott & Bergman RFM Formula (2018)
Men: 64 - (20 × Height / Waist), Women: 76 - (20 × Height / Waist)Derived from cross-sectional analysis of 12,581 participants in NHANES, validated against whole-body dual-energy X-ray absorptiometry.
Model Assumptions
- Adult population aged 20-80
Variables & Standard Units
| Symbol | Physiological Meaning | Unit |
|---|---|---|
| Height | Standing height | cm |
| Waist | Waist circumference | cm |
Scientific Limitations
- Relies on accurate waist measurement without clothing bulk
Peer-Reviewed Scientific Citations
Relative fat mass (RFM) as a new estimator of whole-body fat percentage - A cross-sectional study in American adult individuals (2018)
Woolcott OO, Bergman RN (2018) — Scientific Reports, 8, 10980
Key Finding: RFM = 64 - (20 * height / waist) + (12 * sex). Validated against DEXA with higher diagnostic accuracy for body fat percentage than BMI.
Frequently Asked Questions
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