Wrist Circumference Frame Size Calculator
Enter your height and wrist circumference to see your body frame size.
Result
How it is calculated
The tool divides height by wrist circumference, r = height / wrist, and compares that ratio with sex-specific cut-offs. For women: r above 11.0 is a small frame, 10.1 to 11.0 medium, below 10.1 large. For men: r above 10.4 is small, 9.6 to 10.4 medium, below 9.6 large. A thinner wrist relative to height gives a higher ratio and a smaller frame. Height and wrist must be in the same unit, centimetres or inches, because the ratio has no unit; mixing them gives a meaningless number. Height must be between 50 and 272 and wrist between 5 and 40, otherwise there is no result, so a wrist in inches below 5 is rejected. Any sex setting other than female uses the male cut-offs. The ratio is a rough screening index of bone structure, not a clinical measurement.
Worked example
A woman, height 170 cm, wrist 16.5 cm. Step 1: ratio = 170 ÷ 16.5 = 10.30. Step 2: for women the medium band runs from 10.1 to 11.0. Step 3: 10.30 falls in that band, so the frame is Medium. If the same ratio were entered for a man, 10.30 would sit inside the male medium band of 9.6 to 10.4, so it is Medium there too. A ratio of 11.2 would be small for a woman.
Common mistakes
- Mixing units, for example height in centimetres and wrist in inches. With 170 cm and 6.5 in the ratio is 26.15 and the frame is reported Small; height in inches with wrist in centimetres gives about 4 and Large.
- Measuring the wrist loosely or at the wrong place. Measure just beyond the wrist bone on the hand side, with the tape snug, and on the same wrist each time.
- Using the male setting for a woman or the reverse. The cut-offs differ, so the same ratio of 10.00 is Large for a woman but Medium for a man.
- Treating the frame size as a body weight target. It only says how your bones compare with your height; it does not say how much you should weigh.
- Expecting a very sharp boundary. A ratio of 10.09 and one of 10.11 give different labels for a woman though the bodies are nearly identical.
About this calculator
Body frame size — small, medium or large — is estimated from the ratio of height to wrist circumference, sometimes called the frame index: a smaller wrist relative to height indicates a small frame, while a proportionally larger wrist indicates a large one. The method traces back to the frame-size tables used alongside Metropolitan Life Insurance's height-weight charts, which recognized that two people of the same height can have very different healthy weight ranges depending on their underlying bone and joint structure.
Personal trainers, nutritionists and fitness enthusiasts use frame size to adjust ideal body weight ranges and body composition goals, since applying a single weight target to every person of a given height ignores real differences in skeletal build — a large-framed person carrying the "ideal" weight for their height may actually be underweight for their frame, and vice versa.
This calculator takes your height and wrist circumference and returns your estimated body frame size, so you can use a weight or body composition target that fits your actual build rather than a one-size-fits-all chart.
Was this helpful?
You can pick up to 3 reactions.
Popular calculators
Loan Calculator
Monthly payment, total interest and full amortization schedule.
Percentage Calculator
Percent change, percent of, and ratio calculations.
Discount Calculator
Calculate final price, savings, and discount amount.
BMI Calculator
Body mass index from height and weight (metric or imperial).
Age Calculator
Compute your exact age in years, months and days from a birth date.
Compound Interest Calculator
Calculate the final amount and interest earned with compounding.
All Calculators
No calculators found
Comments (0)