Body Measurement Tool
Searching for a body shape calculator that uses just height and weight? Here's what those two numbers can actually tell you — plus your frame size if you add one more measurement.
Measured just below the wrist bone, at the narrowest point
Enter your height and weight as numbers greater than zero.
Body Mass Index
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Frame Size
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Add your wrist measurement above to also get a frame size result (small / medium / large) — the genuine skeletal-build signal that height and weight alone can't provide.
If you searched for a body shape calculator that only asks for height and weight, here's the honest answer: hourglass, pear, apple, rectangle and inverted triangle are all defined by the relationship between your bust, waist and hip measurements — not by your overall size. Two people with identical height and weight can have completely different shapes, and two people with the same shape can be very different sizes. Height and weight simply don't contain that information.
What height and weight can tell you is your BMI — a general size-to-height ratio — and, with one more number, your body frame size. Want the actual shape result? Our full body type calculator uses bust, waist, high hip and hip specifically because that's the only combination that can answer it. And to see how two very different bodies can share the same height and weight, put them side by side in the body visualizer's Compare mode.
Body frame size describes your skeletal build — small, medium, or large — based on the ratio between your height and your wrist circumference. Wrist size is a useful proxy for bone structure specifically because the wrist carries very little muscle or fat; it's mostly bone, so its width mostly reflects your underlying frame rather than your current fitness or weight.
This is a genuinely different question from body shape. Frame size doesn't change with weight loss or muscle gain, and it doesn't distinguish hourglass from pear — it tells you whether your skeleton runs narrow, average, or broad for your height, which is useful context for reading BMI and ideal-weight charts accurately.
Wrap a flexible tape measure around your wrist just below the wrist bone (the bony bump where your hand meets your forearm) — the narrowest point of the wrist. Keep the tape snug against the skin but not compressing it. Measure in the morning before any swelling sets in, and take the reading twice to confirm consistency.
The method used here — height divided by wrist circumference — traces back to the Metropolitan Life Insurance Company's 1983 height and weight tables, and remains the most commonly used version of this calculation:
| Frame | Women (height ÷ wrist) | Men (height ÷ wrist) |
|---|---|---|
| Small | Above 11.0 | Above 10.4 |
| Medium | 10.1 – 11.0 | 9.6 – 10.4 |
| Large | Below 10.1 | Below 9.6 |
A smaller ratio means a comparatively thicker wrist for your height, which is why the numbers run in the opposite direction you might expect — small ratio, large frame. Different calculators online use very slightly different boundary numbers (some use 10.9 instead of 11.0 for women, for instance); the categories and general logic are consistent even where the exact decimal varies by source.
Frame size matters most as context for weight charts. Classic ideal-body-weight formulas are typically built around a medium frame, then adjusted by roughly 10% in each direction — subtracting for a small frame, adding for a large one — since a broader skeleton simply carries more structural weight before body fat is even part of the picture. If a standard BMI or ideal-weight chart has always felt like it was aimed at someone else's body, a frame-size mismatch is often why.
BMI — weight divided by height squared — is the one genuine size metric height and weight can produce on their own, which is why it's included in the result above. It has real limitations: it can't tell muscle from fat, and it says nothing about where on your body that weight sits. For that second question, our waist to hip ratio calculator and waist to height ratio calculator both add the missing piece using one extra measurement each. To see what a BMI actually looks like at your height, try the BMI visualizer, which draws a body for any height and weight and updates the BMI live. For proportions such as leg length and arm span, see the body proportions calculator.
No — body shape (hourglass, pear, apple, and so on) is defined by the relationship between bust, waist and hip measurements, which height and weight don't capture at all. Height and weight can tell you your BMI and, with a wrist measurement added, your frame size — but not your shape category.
Frame size describes your skeletal build — small, medium or large — and stays fairly constant throughout adulthood regardless of weight changes. Body shape describes the proportional relationship between your bust, waist and hips, and can shift with weight change, pregnancy, training or age. They're independent measurements answering different questions.
No. Frame size is driven by bone structure, which doesn't meaningfully change in adulthood regardless of weight change, muscle gain, or training. That stability is exactly why it's used as a fixed reference point for adjusting weight charts rather than something to track over time.
It's a widely used, easy-to-measure proxy rather than a lab-grade skeletal assessment. Elbow breadth is sometimes used as an alternative or cross-check, but wrist circumference is the version most commonly cited because it only takes one simple measurement to get a reasonable estimate.
Yes — enter just your height and weight for a BMI result. You'll only get the frame-size half of the result once a wrist measurement is added, but the BMI figure works on its own.
If you came here looking for "hourglass or pear," frame size isn't quite that — but it answers the question height and weight were actually capable of answering, honestly, rather than forcing a shape label those two numbers were never going to support.
This calculator is for educational and informational purposes only. It does not diagnose any medical condition and isn't a substitute for advice from a qualified healthcare professional.