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Body Type Calculator | Identify Shape From Bust-Waist-Hip Ratios

Last updated: June 2026 · Free · No sign-up required

Results

Enter values above and click Calculate to see your result instantly.

Quick reference

Body shape	Defining ratio
Hourglass	Bust ≈ hips, waist much smaller
Pear (triangle)	Hips > bust
Apple (round)	Bust/waist > hips
Rectangle	Bust, waist, hips similar
Inverted triangle	Bust/shoulders > hips

monitor_weight A starting point, not a diagnosis

This calculator gives you the same number a clinician would compute by hand from your inputs. It is informational, never a substitute for a doctor. If a result surprises you, write it down and discuss it at your next appointment — that conversation is the goal, not a verdict from a webpage.

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Every health calculator on CalcaTools uses an equation from the WHO, NIH, ACOG, CDC, or a published peer-reviewed paper. The exact citation is in the "Formula & methodology" section. We re-check sources quarterly and update the page when guidance changes — the "Last reviewed" date is at the top.

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Health calculations only help if you can actually use them. We use plain-English labels (no jargon), accept both metric and US units, and show what a "normal" range looks like alongside your result — so you understand what the number means, not just what it is.

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Your weight, height, age, pregnancy details, and any other health input never leave your browser. Calculations run client-side; nothing is logged or stored on our side. We don't want your medical data — we just want the formula to work for you.

Interpretation guide

Waist-to-hip ratio	Reading
Below 0.75	Curvier (pear / hourglass)
0.75 – 0.80	Balanced proportions
0.80 – 0.85	Straighter (rectangle)
Above 0.85	More weight at the middle (apple)

lightbulb Worked example

Let's say you are using the Body Type Calculator. Classifies your body shape from three measurements. Enter your bust, waist, and hip measurements in inches, and the tool compares the ratios between them to identify your shape — hourglass, pear, Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula Compare bust, waist and hip measurements; key ratio = waist ÷ hips and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: Compare bust, waist and hip measurements; key ratio = waist ÷ hips

How the result is calculated

Body shape is classified by comparing bust, waist and hip measurements. The waist-to-hip ratio and which of bust or hips is larger place you into one of the standard shapes — useful for clothing fit, not a medical assessment.

Measure bust, waist (narrowest point) and hips (widest point) in the same unit.
Compare bust to hips and compute waist ÷ hips.
Match the pattern: balanced bust/hips with a small waist is an hourglass; larger hips a pear; larger bust an inverted triangle.

Example

Bust 36, waist 27, hips 38: bust ≈ hips and waist is much smaller, with a waist-to-hip ratio of 27/38 = 0.71 → hourglass shape.

Authoritative source: U.S. Centers for Disease Control and Prevention

Frequently asked questions

How do I find my body type?

Measure your bust, waist and hips, then compare them. Similar bust and hips with a much smaller waist is an hourglass; wider hips a pear; wider bust or shoulders an inverted triangle; all similar a rectangle.

What is the waist-to-hip ratio?

The Body Type Calculator is free, private, and accurate: it runs entirely in your browser (no uploads, no accounts), applies the standard calculation, and explains each step so you can verify the result. Classifies your body shape from three measurements. Enter your bust, waist, and hip measurements in inches, and the tool compares the ratios between them to identify your shape — hourglass, pear, apple, rectangle, or inverted triangle — with style guidance There is no limit on usage, and it works on any device.

What are the five main body shapes?

The five classic shapes are: hourglass (bust and hip similar, waist significantly narrower), pear (hips wider than bust), apple (waist wider than hips, weight carried centrally), rectangle (bust, waist, and hip similar — straight figure), and inverted triangle (shoulders/bust wider than hips). The calculator classifies you from your bust, waist, and hip measurements using the waist-to-hip ratio and the bust-to-hip comparison.

Is body type the same as body fat or health?

No — body type (ectomorph, mesomorph, endomorph) describes your natural proportions and frame, which are largely genetic. It is not a measure of body fat, fitness, or health. The calculator compares your bust, waist, and hip measurements with the key ratio = waist ÷ hips to classify your shape for clothing and training purposes, while health indicators like BMI and waist circumference are separate metrics.

Can my body type change?

The underlying frame (bone structure, hip width) is genetic and stays, but the SHAPE classification can change with weight gain or loss, muscle development, and age — waist-to-hip ratio shifts with fat distribution and training. Pear shapes can become more hourglass with upper-body training; apple shapes can move toward rectangle with weight loss. Re-measure periodically; the calculator reclassifies you from current measurements.

What does the Body Type Calculator do?

Classifies your body shape from three measurements. Enter your bust, waist, and hip measurements in inches, and the tool compares the ratios between them to identify your shape — hourglass, pear, apple, rectangle, or inverted triangle — with style guidance. The calculator takes your inputs, applies the standard calculation, and returns a clear result so you can make an informed decision without doing the math by hand.

What formula does the Body Type Calculator use?

It compares your bust, waist, and hip measurements and uses the key ratio = waist ÷ hips, combined with shoulder and hip widths, to classify your frame into the classic somatotype categories. Enter your measurements and the tool returns your body type with guidance on how each shape typically carries weight and responds to training.

Is the Body Type Calculator free and private?

Yes — the Body Type Calculator. There is no sign-up, no paywall, no trial, and no limit on how many calculations you can run. CalcaTools covers its costs with non-intrusive display advertising, so the calculator itself never asks for payment or restricts any feature.

How accurate is the Body Type Calculator?

The Body Type Calculator applies the standard formula: Compare bust, waist and hip measurements; key ratio = waist ÷ hips. It is tested against published worked examples before launch and uses native double-precision arithmetic, so results are accurate to typical precision for the values you enter — with no intermediate rounding that could distort the answer.

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