Does Relative Fat Mass upload my file or text to Tool-You servers?

No. Relative Fat Mass runs in this browser tab. Files stay on the device. Limit note: Height, waist, sex. RFM formula. Not medical advice.

Should I use Waist-Hip Ratio instead of Relative Fat Mass?

Use Relative Fat Mass when you need RFM from height, waist, and sex. Use Waist-Hip Ratio when you need Waist/hip ratio with sex-aware tip. They share a category (Health) but not the same job.

Relative Fat Mass

RFM from height, waist, and sex.

Relative Fat Mass using height and waist. Unlike Waist to Height this is RFM, not a simple ratio. Unlike Waist–Hip Ratio this ignores hip. Not medical advice.

What Relative Fat Mass does

Relative Fat Mass using height and waist. Unlike Waist to Height this is RFM, not a simple ratio. Unlike Waist–Hip Ratio this ignores hip. Not medical advice.

The interactive controls for Relative Fat Mass load after this article so crawlers still read the instructions. Path /health/relative-fat-mass is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for Relative Fat Mass.

How to use Relative Fat Mass

Confirm you need Relative Fat Mass, not Waist-Hip Ratio (Waist/hip ratio with sex-aware tip.). Address: /health/relative-fat-mass.
Enter the numbers or dates Relative Fat Mass uses. RFM from height, waist, and sex.
Read the result as Relative Fat Mass defines it — not as Waist to Height (Waist centimetres over height centimetres.). Relative Fat Mass using height and waist. Unlike Waist to Height this is RFM, not a simple ratio. Unlike Waist–Hip Ratio this ignores hip. Not medical advice.
Relative Fat Mass is an estimate in the browser, not professional advice. Height, waist, sex. RFM formula. Not medical advice.
Need a different formula? Try Waist to Height (Waist centimetres over height centimetres.) instead of stretching Relative Fat Mass.

When not to use Relative Fat Mass

Skip Relative Fat Mass when a neighbor tool matches better — start with Waist-Hip Ratio or Waist to Height — or when the description already warns the job will fail. In the tool’s own words: Relative Fat Mass using height and waist. Unlike Waist to Height this is RFM, not a simple ratio. Unlike Waist–Hip Ratio this ignores hip. Not medical advice.

Questions about Relative Fat Mass

What does Relative Fat Mass do that other Health pages on this site do not?: Relative Fat Mass using height and waist. Unlike Waist to Height this is RFM, not a simple ratio. Unlike Waist–Hip Ratio this ignores hip. Not medical advice. Short version: RFM from height, waist, and sex.
Does Relative Fat Mass upload my file or text to Tool-You servers?: No. Relative Fat Mass runs in this browser tab. Files stay on the device. Limit note: Height, waist, sex. RFM formula. Not medical advice.
Should I use Waist-Hip Ratio instead of Relative Fat Mass?: Use Relative Fat Mass when you need RFM from height, waist, and sex. Use Waist-Hip Ratio when you need Waist/hip ratio with sex-aware tip. They share a category (Health) but not the same job.
What are the limits of Relative Fat Mass?: Height, waist, sex. RFM formula. Not medical advice. Also: Relative Fat Mass using height and waist. Unlike Waist to Height this is RFM, not a simple ratio. Unlike Waist–Hip Ratio this ignores hip. Not medical advice.