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Waist to Hip Ratio Calculator

Works out the waist-to-hip ratio and the waist-to-height ratio from three measurements, and reads each against its published band: the World Health Organization cut-points for waist-to-hip and the NICE bands for waist-to-height.

Waist-to-hip ratio
0.80
Waist-to-Hip Ratio Calculator
Waist-to-hip band
Below the WHO cut-point of 0.85
Waist-to-height ratio
0.47
Waist-to-height band
Healthy central adiposity
WHO cut-point for this sex
0.85
Waist
80.0 cm
Worked out from WHO, Waist circumference and waist-hip ratio: report of a WHO expert consultation, 2008 (published 2011) and 1 other source.
Measure the hip around the widest part of the buttocks. Some surveys measure at the hip bones instead, which gives a different number, so the two are not interchangeable.
A screening ratio, not a diagnosis. What it means for you is a conversation with a clinician.

Your figures

Updates as you type
Only the waist-to-hip cut-point differs; the waist-to-height bands are the same for everyone.
Both are always worked out; this only chooses which is the headline.
Midway between the lowest rib and the top of the hip bone, at the end of a normal breath out.
Around the widest part of the buttocks.

How this is worked out

4 steps
  1. Waist-to-hip = 80 ÷ 100 = 0.8
  2. Waist-to-height = 80 ÷ 170 = 0.47
  3. 0.47 falls in the NICE band "Healthy central adiposity" — Below 0.5: no increased health risks from central adiposity.
  4. Hip is measured around the widest part of the buttocks; waist midway between the lowest rib and the top of the hip bone.

Its 3 worked examples are re-run on every release, last on 15 September 2026. What changed

Sources and references

2 sources
WHO, Waist circumference and waist-hip ratio: report of a WHO expert consultation, 2008 (published 2011)
Source of the 0.90 and 0.85 cut-points. The report body could not be retrieved during research, so the cut-points are cited from the publication record and secondary literature; the inclusive reading of the boundary is this page’s stated choice, not a quotation.
NICE guideline NG246, Overweight and obesity management
Waist-to-height bands: below 0.5, 0.5 to 0.59, and 0.6 or more.

What this calculator does

Works out the waist-to-hip ratio and the waist-to-height ratio from three measurements, and reads each against its published band: the World Health Organization cut-points for waist-to-hip and the NICE bands for waist-to-height.

How to use Waist to Hip Ratio Calculator

Enter Units, Sex, Lead with, Waist, Hip and Height. The calculator checks the values, applies the stated method, and updates the result without saving your figures.

What the result means

The result includes Waist-to-hip ratio, Waist-to-hip band, Waist-to-height ratio, Waist-to-height band, WHO cut-point for this sex and Waist. Review the visible working and any warnings before using the answer for a decision.

Method and checks

The method cites WHO, Waist circumference and waist-hip ratio: report of a WHO expert consultation, 2008 (published 2011); NICE guideline NG246, Overweight and obesity management. Its 3 built-in worked examples are checked on every full test run. The initial answer and working are rendered on the server, so they remain readable without JavaScript.

Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.

Embed this calculator on your website

Copy this code into any page. The calculator appears with the figures currently entered, sizes itself to fit, and a small credit line links back here. Free, no account, no ads inside it, no tracking of your readers. Set your own figures and fixed fields; Personal removes the credit line, sets your colour and shows you which sites use it.

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