Waist-to-hip and waist-to-height ratio

With a tape measure, measure waist, hips and height. The calculator shows the most widely used abdominal fat indicators and whether they fall in a risk range.

in
in
in

Waist midway between the lowest rib and the hip bone; hips at the widest part of the glutes.

Waist-to-height ratio
0.51
Increased risk
Waist-to-hip ratio
No increased risk
0.89
Waist circumference
No increased risk
35 in
BRI (Body Roundness Index)
Under 3: lean · around 5: average · over 7: rounder midsection
3.5

Indicators for adults. They don't replace a medical evaluation.

How it works

  1. Waist-to-height ratio = waist ÷ height. From 0.5, risk is increased; from 0.6, it's high.
  2. Waist-to-hip ratio = waist ÷ hips. Increased risk from 0.90 in men and 0.85 in women (WHO).
  3. Waist: increased risk above 94 cm / 37 in (men) and 80 cm / 31.5 in (women); high above 102 cm / 40 in and 88 cm / 34.6 in (WHO).
  4. BRI (Body Roundness Index, Thomas et al., 2013) estimates body shape from waist and height.

FAQ

Where do I measure waist and hips?

Waist: midway between the lowest rib and the top of the hip bone, at the end of a normal breath out. Hips: around the widest part of the glutes. Keep the tape level and snug, not tight.

Why look at the waist and not just BMI?

Abdominal fat is more closely linked to cardiovascular and metabolic risk than total weight, and BMI doesn't show where fat is stored.

In Trainer Fácil, clients fill in measurements in the app and you compare their waist over time, assessment after assessment.

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