Body Shape Calculator

How to measure bust, waist, high hip, and full hip

Use a flexible, nonstretch tape over light clothing or undergarments. Stand normally, keep the tape level with the floor, and let it rest against the body without compressing. Measure the bust at its fullest circumference, the natural waist at its narrowest point, the high hip at a repeatable approximate upper-hip landmark between the waist and full hip, and the full hip at the widest circumference.

Enter all four measurements in the selected unit. Repeat a measurement if the tape tilted or twisted. The software accepts 40–300 cm equivalent only as a typing and computation bound; that interval is not a medical “normal range.” A high hip greater than the full hip, or a waist greater than the hip, is allowed because the model explicitly includes larger-waist cases.

Which body-shape model does this calculator use?

This page implements the nine-category rules published in Table 9 of Sokolowski and Bettencourt's 2020 modified FFIT apparel model. The four letters in the rule receipt mean bust (B), waist (W), high hip (U), and full hip (H). Each predicate is evaluated independently from exact normalized measurements, so more than one category—or no category—can be a valid model outcome.

The earlier Lee et al. work studied female apparel scan samples in the United States and Korea. The 2020 paper reintroduced Oval and Diamond into the mathematical formulas and revised rules for cases where the waist is larger than other circumferences. These are research categories for apparel proportions, not universal biological identities. The samples do not establish validity for every person, size, culture, or garment brand.

How to read the result and rule receipt

A single match means exactly one of the nine published predicates passed. Multiple matches are listed together without selecting a primary. “No clear category” means none of those predicates passed; the calculator does not invent the closest label. Open any category in the receipt to inspect its actual PASS and FAIL comparisons.

The optional ±0.5 cm sensitivity note appears only when changing one measurement by that amount changes the matched-label set. It is an illustrative deterministic check, not a confidence percentage, accuracy estimate, or measured error rate. Different calculators can disagree because they use different model versions or rules.

Privacy and local export

The calculation, unit conversion, rule comparison, sensitivity check, copy action, and text-file creation run in this browser. Measurements and category results are not placed in the URL, saved to local storage, or sent to a calculation service. The short copied summary omits measurements. The optional downloaded text receipt includes them, so save or share that file only if you choose.

Not a health or appearance assessment

This tool does not calculate waist-to-hip ratio, BMI, body fat, health risk, fertility, attractiveness, an ideal body, or a weight-loss target. WHO and NIDDK materials are cited to make that boundary explicit: individual health assessment requires information this apparel model does not collect.