Four measurements, nine published shapes, and the exact rule that produced your result. If a 1 cm tape-placement change would flip the answer, this page says so instead of hiding it.
Your result
Bust, waist and hip are required. High hip is optional, but it is the measurement that separates a Spoon from a Bottom Hourglass.
Hourglass family
Add high hip to separate Spoon, Bottom Hourglass and Triangle.
Shape describes four circumferences. It is not a health measure or a body-fat estimate. See the exact formulas.
femalebodyshapecalculator.com turns four measurements — bust, waist, high hip and hip — into a published FFIT body-shape result and shows the exact rule that produced it. Most body shape calculators return a label and stop. This one returns the label, the rule that fired, the nearest boundary, and the result the older formula set would have given you.
The method is FFIT — the Female Figure Identification Technique — developed at North Carolina State University from 3D body scans for clothing fit. It compares four circumferences: bust, waist, high hip and hip. It does not use height, weight, age or photographs, and it does not classify Kibbe image identities or Heath–Carter somatotypes.
The published formulas are written in inches and checked in a fixed order. The calculator follows that order exactly, and the method page lists every threshold.
Bust, waist, high hip and hip. High hip is optional; the other three are required.
The thresholds come from the papers, which use inches. Centimetres are converted before any rule runs.
Hourglass first, then Bottom Hourglass, Top Hourglass, Spoon, Triangle, Inverted Triangle, Rectangle, Diamond and Oval.
The result card reports the closest threshold and what a ±1 cm change would do.
Five everyday families, nine published shapes. The figures below are diagrams, not photos: each one is drawn from the shape's measurement pattern, so two people with the same numbers get the same drawing.
Bust and hips close, waist clearly smaller
Bust leads the hips, waist still defined
Hips lead the bust, waist defined, no high-hip shelf
Hips lead, high hip flares, waist defined
Hips lead, waist drop modest or undefined
Bust, waist and hips stay close
Bust leads the hips, waist drop under 9 in
Waist larger than hips, not larger than bust
Waist larger than both bust and hips
Take a bust of 34 in, a waist of 27 in and a hip of 39 in. Those three numbers are identical in both examples below. The high hip changes the answer:
| High hip | High hip ÷ waist | Result | Why |
|---|---|---|---|
| 33 in | 1.222 | Spoon | The upper hip flares at 1.193 × waist or more. |
| 31 in | 1.148 | Bottom Hourglass | The hip lead is there, but the high hip stays below the shelf threshold. |
That is why sites that ask for only three measurements stop at “pear” or “hourglass” and cannot tell you which one. The high hip is not an extra detail; it is the measurement that decides the category. If you are not sure where to put the tape, the measurement guide has a landmark method.
A 2021 study in Ergonomics measured 1,679 women with different tape-placement definitions and found that moving a measurement by about 1 cm changed the FFIT category for up to 40% of them. The categories are real, but the boundaries are not walls.
The result card runs the same test on your numbers: it reclassifies with each measurement moved up and down by 1 cm and names any shape that appears. If your result is stable, it says so. If it is not, it says which measurement is doing the work. The longer guide covers weight change, posture, pregnancy and the difference between measuring over clothes and on skin.
Use a soft tape, keep it level, and do not pull it tight enough to compress the body. If two readings differ, take a third. The full guide has the landmark method for each point.
Around the fullest part, tape level with the floor. Do not measure over a padded bra.
The narrowest part of the torso, usually just above the navel. Breathe out; do not suck in.
Around the top of the hip bones, about 7–9 cm below the waist, before the fullest hip.
Around the fullest part of the hips and seat, feet together, tape level.
Bust, waist, hip and — for the full result — high hip. High hip is the measurement around the top of the hip bones, between the waist and the fullest hip. Without it, the calculator can still place you in a family, but it cannot separate Spoon from Bottom Hourglass or Triangle.
Most online calculators use only bust, waist and hip. Those three numbers can identify the hourglass, rectangle and inverted-triangle patterns, but two bodies with the same three numbers can be a Spoon or a Bottom Hourglass depending on the high hip. We ask for it so the result can be specific, and we say when it is missing.
No. Kibbe is a separate image-identity system built around yin and yang, bone structure and facial features. This calculator uses FFIT, a measurement-based system developed for clothing fit. The two systems use different inputs and can give different answers.
There are two common reasons. First, some calculators use the 2007 seven-shape formulas and some use the 2020 revision that added Oval and Diamond. Second, tape placement matters: a 2021 study of 1,679 scans found that moving a measurement by about 1 cm changed the category for up to 40% of women. This page shows which formula version produced your result and how close you are to the nearest boundary.
It means your hips lead your bust and your waist is at least 7 inches smaller than your hips, but the high-hip measurement is missing. Add high hip and the calculator can separate Spoon, Bottom Hourglass and Triangle. Until then, “pear family” is the honest answer rather than a guess.
The original 2007 formulas assumed the waist was smaller than the bust and hips. The 2020 revision added Diamond (waist larger than both) and Oval (waist larger than hips but not the bust) so that bodies with a larger abdomen are not forced into Rectangle or Inverted Triangle. This calculator uses that revision by default and shows the 2007 answer when it differs.
Yes. The form accepts centimetres or inches. The published FFIT thresholds are in inches, so centimetre inputs are converted to inches before the rules are applied. The result is shown in the unit you chose.
No. The calculation runs in your browser. The page does not send the numbers to a server, does not write them to localStorage, and does not put them in the URL. Closing the page clears them.
No. FFIT describes the relationship between four circumferences for clothing fit. It is not a medical test, a body-fat measure or a risk score. If you want a health-related number, waist-to-height ratio and waist-to-hip ratio are separate measures with their own reference points, and they are not the same thing as a shape label.
No. The FFIT formulas were developed from scans of women and use bust, waist, high hip and hip. Men’s shapes need a different measurement set. Using this calculator on chest, waist and hip measurements will produce a label, but it is not a validated men’s classification.
The calculator uses the 2020 revision of the FFIT formulas and keeps the 2007 formulas for comparison. The method page lists every threshold, the source paper, and the limitations. The distribution figures used in the chart come from the 2003 SizeUSA study of 6,318 US women.