Body Type Calculator

What is body type?

Body type or body shape refers to the natural skeletal structure and fat-distribution pattern of your body. For women the five main shapes most commonly recognised in fashion are Hourglass, Pear (Triangle), Rectangle, Inverted Triangle and Triangle. Knowing your shape can help guide clothing choices, but it is not a measure of health or attractiveness; all body shapes are normal and healthy at a healthy weight.

How to measure correctly

Stand straight with arms at your sides. Use a flexible measuring tape snug against the body but not compressing it. Measure in front of a mirror for accuracy and take each measurement twice:

• Bust: Bust: circumference around the fullest part of the breasts, wearing a non-padded bra.
• Waist: Waist: smallest circumference around the natural waist, usually just above the belly button.
• High hip: High hip: circumference of the upper hip over the pelvic region, about 18 cm (7 in) below the natural waist.
• Hip: Hip: largest circumference around the hips, over the widest part of the buttocks.

The five body shapes explained

Hourglass

Well-defined waist with bust and hips of similar size. Often considered the classic feminine silhouette.

Pear (Triangle)

Hips are wider than bust with a defined waist. Weight tends to settle around hips and thighs.

Rectangle (Straight)

Bust, waist and hips measure roughly the same with little waist definition. Athletic, straight silhouette.

Inverted Triangle

Broad shoulders and bust with narrower hips. Athletic build common in swimmers and competitive athletes.

Triangle

Narrower shoulders and bust with wider hips. Similar to pear but with less waist definition.

Understanding Waist-Hip Ratio (WHR)

Waist-hip ratio is waist circumference divided by hip circumference. WHO research consistently shows it predicts cardiovascular and metabolic risk better than BMI because it shows where fat is stored - abdominal fat is the kind that matters most for health. For women the threshold for elevated risk is approximately 0.85; for men it is 0.90.

Important notes

• Body shape is largely determined by bone structure and fat-distribution genetics
• Shape can shift with weight loss, weight gain, pregnancy and aging
• All body shapes are healthy at a healthy weight - this is fashion guidance, not a diagnosis
• WHR is a stronger health indicator than body shape alone
• These five categories are simplifications; most people are a blend
• Muscle gain from resistance training can change your apparent shape over time
• Use this output for clothing curiosity and self-confidence, not as a limit

Which body shape is the most common?

Multiple large studies of women have found Rectangle to be the most common shape - around 46% of women, depending on the dataset. Pear (Triangle) is second at roughly 21%, Inverted Triangle around 14%, Hourglass around 8% and Triangle the remainder. Hourglass is often portrayed as the default in fashion media, but it is actually one of the rarer shapes. Knowing this can help you reset expectations: dressing for the body you have, not the one Instagram says you should have, is the whole point of body-shape guidance.

Does body shape really matter for health, or is it just fashion?

The shape itself - whether bust is wider than hip or vice versa - has almost no independent health implication once weight, body composition and waist-hip ratio are controlled for. What does matter is the waist-hip ratio shown alongside your shape. A high WHR means abdominal fat dominates, and abdominal fat is the kind linked to higher risk of type 2 diabetes, hypertension and cardiovascular disease. So treat shape as styling information and WHR as the health number.

Can my body shape actually change?

Yes, but slowly and within limits. Your skeletal structure (shoulder width, hip width, torso length) is set after puberty and does not change much in adulthood. Fat distribution can shift somewhat: weight loss usually shrinks waist and hip proportionally, but a long-term recomposition through resistance training can move you from a Rectangle toward a more hourglass-like outline by building the glutes, lats and deltoids. Pregnancy, menopause and significant weight changes can shift the apparent shape, especially the waist-to-hip ratio.

Why does the calculator ask for high hip on top of regular hip?

Adding the high-hip measurement makes the shape classification more accurate because some women carry weight on the upper pelvis (just below the waist) while having a relatively narrow widest-hip line, or vice versa. Without the high-hip data the calculator can confuse an upper-hip-heavy build with a true Triangle. The high hip should be measured about 18 cm (7 in) below your natural waist, around the upper pelvic bone. If you do not know your high hip yet, a tape measure plus a mirror takes 30 seconds.

What are the exact ratio thresholds used to classify each body shape?

This tool uses the FFIT / Lee bust-waist-hip classification adapted for a scoring model rather than a single hard cutoff. Hourglass scores highest when bust and hip are within about 5% of each other AND the waist is at most 75% of both bust and hip (waist/bust and waist/hip both <= 0.75). Pear (Triangle) scores up when the hip exceeds the bust by more than 3.5% and the waist is at most 80% of the hip, with the widest point at the LOW hip line. Inverted Triangle leads when the bust exceeds the hip by more than 3.5%. Rectangle leads when bust and hip are within 5% but the waist is barely suppressed (waist/hip and waist/bust above 0.75). Triangle is like Pear but with a weak waist taper. Because the calculator scores all five and shows your primary plus the closest secondary shape with a confidence percentage, borderline figures are reported as a blend (for example 55% Rectangle / 45% Hourglass) instead of being forced into one box - useful for pattern-makers choosing a drafting block, ease and silhouette.

What is the Apple (round) shape, and why does this tool not classify it?

The Apple or round shape describes a figure that carries weight mainly around the midsection, so the waist measures as wide as or wider than the bust and hip and there is little to no waist definition. It is the body type the pregnancy note refers to. This calculator classifies the five fashion silhouettes based on the bust-waist-hip outline (Hourglass, Pear/Triangle, Rectangle, Inverted Triangle, Triangle) and treats Apple as a high-waist-ratio variant rather than a separate label: an Apple figure will usually come back as Rectangle or Inverted Triangle with a high Waist : Hip percentage and an elevated waist-hip ratio. The WHR number shown alongside your shape is the better signal for an apple distribution, since a WHR above 0.85 in women flags the abdominal fat pattern that defines the apple shape.

How accurate is WHR as a cardiovascular risk indicator?

Across more than 30 prospective cohort studies, WHR predicts cardiovascular events and all-cause mortality at least as well as BMI, and in several large meta-analyses (INTERHEART, Lancet 2005; Yusuf et al.) it does so better than BMI for the same population. For women a WHR above 0.85 doubles the cardiovascular risk compared with a WHR below 0.80, independent of total weight. It is not a perfect measurement - very lean athletic women can have low WHR with high body fat in unusual distributions - but as a single number from a tape measure, it punches above its weight.

Should men use this calculator?

The shape classification rules in this calculator are calibrated for typical female bust-waist-hip patterns and will not give meaningful results for male bodies. Men generally do not have the bust-to-hip differential the classifications expect, so almost every male body will be classified as Rectangle or Inverted Triangle by default. The WHR portion is still useful for men but uses a different cut-off: WHR above 0.90 indicates elevated cardiovascular risk in men, vs 0.85 in women. For men, a male-specific shape tool (Mesomorph/Endomorph/Ectomorph) is a better fit.

I'm pregnant - should I use this tool?

Skip it during pregnancy. Your bust, waist and hips all change significantly during the second and third trimesters, and the temporary shape almost always classifies pregnant women as Apple or Inverted Triangle even if their pre-pregnancy shape was Hourglass or Pear. Re-measure around 6 months postpartum, after most of the immediate fluid and weight changes settle, to get a meaningful reading. WHR is also unreliable during pregnancy because the waist is no longer the smallest point around the abdomen.

Does training change which body shape I should dress for?

It can over the long term. Building visible glutes shifts a Rectangle toward Pear or Hourglass; building shoulders and lats shifts a Pear toward Hourglass or Inverted Triangle; tightening the core through strength training and lean-mass gain tends to drop WHR even when total weight does not change. So if you have been training seriously for 12+ months, re-measure and re-classify - dress for the body you have now, not the one you had three years ago. The styling rules apply to the current silhouette, regardless of how you got there.