How it works

A useful distinction

Same proportions do not mean size

Waist and hip measurements of 80/100 cm and 88/110 cm both produce a 0.80 ratio. Garment sizing still needs the actual circumferences, so save the measurements rather than only the ratio or apparel descriptor.

Using body proportion and clothing descriptors

Body proportions and apparel descriptors answer different questions. A waist of 80 cm and hips of 100 cm give a waist-to-hip ratio of 0.80; with height of 175 cm, waist-to-height is approximately 0.46. The ratios mode reports these relationships. The separate revised FFIT mode uses bust, waist, hip, and high-hip measurements to show matching apparel-research rules. A descriptor is not a medical category or a guarantee of garment fit; measurement placement can change which rules match.

Body proportions: formula and assumptions

Waist-to-hip = waist/hip; waist-to-height = waist/height.

Measurements describe proportions. Labels such as hourglass or apple are informal and are not medical diagnoses.

Fashion descriptors: revised FFIT: formula and assumptions

Evaluate the nine 2020 revised FFIT predicates using differences in inches and high-hip / waist.

An adult apparel research method, with all matching rules shown. Measurement landmarks and method affect classification. It has no medical or fitness interpretation.

Worked example

Using the Body proportions example:

Inputs

Measurement system: Metric (kg, cm)
Height (cm): 175
Waist circumference (cm): 80
Hip circumference (cm): 100

Method

Waist-to-hip = waist/hip; waist-to-height = waist/height.

Result

Example result

Waist-to-hip ratio: 0.8

Waist-to-height ratio: 0.46

These are illustrative inputs. Change the values to explore a different scenario.

What to keep in mind

Body proportions and apparel descriptors have no diagnostic meaning. Revised FFIT rules may overlap or leave measurements unclassified.

Formula references

References explain the underlying methods; they do not imply endorsement or individual professional review of Finflo.

Common questions

Does this calculator show body-shape labels?

The Body proportions mode shows ratios. The separate revised FFIT mode shows apparel descriptors from its stated measurement rules. Neither mode assigns a medical category, and the descriptors do not determine health or fitness.

Must waist, hip and height use the same unit?

Measurements in each ratio must be expressed consistently. Mixing centimeters and inches would distort the ratio unless converted first.

Prepared by Finflo. See our methodology and editorial policy. Read the relevant professional-advice limitations.

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