Shape, not just size
Waist-to-hip ratio (WHR) is exactly what it sounds like: your waist measurement divided by your hip measurement. A higher ratio means more of your weight sits around the middle — the classic "apple" shape — while a lower ratio means more sits around the hips and thighs, the "pear". It matters because abdominal fat is more metabolically active and more strongly tied to heart disease and diabetes than fat carried lower down. Two people with the same weight and BMI can have very different ratios, and very different risk.
The bands the Chonkometer uses
Waist-to-hip ratio (WHR) is your waist circumference divided by your hip circumference. A waist of 80 cm (31.5 in) and hips of 100 cm (39.5 in) give a ratio of 0.80 — and because it's a ratio, it comes out the same in centimetres or inches. Men and women store fat differently, so the bands are sex-specific:
| Ratio | Men | Women |
|---|---|---|
| Low risk | under 0.90 | under 0.80 |
| Moderate | 0.90–0.99 | 0.80–0.84 |
| High risk | 1.0 or above | 0.85 or above |
The WHO uses a single cut-off for substantially increased metabolic risk: 0.90 for men and 0.85 for women. The Chonkometer adds a moderate band in between to show which way you're heading.
What your result means
Low. Your fat distribution isn't adding measurable risk. Fat that sits on the hips and thighs behaves differently from belly fat, and in this range more of it is on the safer side.
Moderate. An early lean towards the "apple" shape, where more fat collects around the middle. Worth taking seriously, because the visceral fat behind that shift tends to respond well to changes in movement, sleep and eating — see how to lose visceral fat.
High. A well-evidenced flag. In the INTERHEART study of 27,000 people from 52 countries, the waist-to-hip ratio was a stronger predictor of heart attack risk than BMI (Yusuf et al., 2005). Especially alongside high blood pressure, blood sugar or a family history of heart disease or diabetes, this is worth a calm conversation with your GP.
Want to know why the belly is where it matters? Read why belly fat matters.
How to measure waist and hips
A ratio built from two sloppy measurements is twice as sloppy. Same tape, same conditions, both numbers in one go.
Waist
- Feel for your lowest rib and the top of your hip bone at the side of your body.
- Place the tape at the midpoint between the two — for most people roughly level with the belly button, but the landmarks are what count. Not at the narrowest point of your torso: that's a fashion waist, not the health waist.
- Read at the end of a normal breath out. Don't suck in.
Hips
- Stand with your feet together and find the widest part of your buttocks — viewed from the side, that's where they stick out furthest.
- Measure around that point. A mirror helps you check the tape hasn't tilted.
For both
- Bare skin or thin underwear, standing relaxed, tape horizontal and snug without pressing in.
- Measure each twice and average. If two readings differ by more than 1 cm (about ½ in), take a third.
The full waist method, including common mistakes, is on the waist circumference calculator page.
Where WHR falls short
It can hide progress. If you lose fat from both your waist and your hips, the ratio may barely move even though your health has improved. Track your waist on its own too.
A high ratio isn't always a big waist. Small hips push the ratio up as well. Someone with a modest waist and very little muscle or fat around the hips and thighs can land in a higher band than their belly deserves. Check your waist circumference or waist-to-height ratio to see which side of the fraction is driving it.
It ignores height and total fat. Two people with the same ratio can differ a lot in size. For the overall picture, pair it with a body fat estimate.
Can you change your ratio?
Yes, from both ends — but only one of them is about health.
The waist end. Losing fat overall is the reliable route, and visceral belly fat often responds early. You can't pick where fat comes off, so crunches won't shrink your waist (here's why). This is the part of the ratio that changes your risk.
The hip end. Training glutes and legs builds muscle around your hips, which widens them and lowers the ratio. That's good for strength, walking, climbing stairs and balance, and it makes your waist look narrower by proportion. Fat and muscle on the hips and thighs are also linked with better metabolic health than fat around the middle (Manolopoulos et al., 2010). But the health gain behind a lower ratio comes mainly from a smaller waist. Bigger glutes improve the number and the shape; they don't cancel out belly fat.
For the measurement that tells you whether your waist is shrinking, see what is a healthy waist size?
When to take it seriously
A ratio in the high band is a reasonable prompt for a check-in with a doctor, particularly alongside other signals like blood pressure or blood sugar. As always, the Chonkometer is a screening toy with real maths behind it — not a diagnosis, and never a substitute for a professional who can actually examine you.
Frequently asked questions
What is a healthy waist-to-hip ratio for a woman?
What is a healthy waist-to-hip ratio for a man?
How do I measure my hips for waist-to-hip ratio?
Is waist-to-hip ratio better than BMI?
What's the difference between an apple and a pear shape?
Can strength training change my waist-to-hip ratio?
Why is my ratio high when my waist is fine?
References
Manolopoulos, K. N., Karpe, F., & Frayn, K. N. (2010). Gluteofemoral body fat as a determinant of metabolic health. International Journal of Obesity, 34(6), 949–959.
World Health Organization. (2011). Waist circumference and waist–hip ratio: Report of a WHO expert consultation, Geneva, 8–11 December 2008.
Yusuf, S., Hawken, S., Ôunpuu, S., et al. (2005). Obesity and the risk of myocardial infarction in 27 000 participants from 52 countries: A case-control study. The Lancet, 366(9497), 1640–1649.