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Visceral Fat Calculator

By Rick Campbell · Updated · Sourced to primary literature · Not medical advice

Visceral adipose tissue sits around the organs. Imaging can estimate its volume. A tape cannot. This page is a central-fat risk proxy: waist-to-height ratio, the WHO waist cut-offs, and body roundness index, shown together so you can see them agree or disagree.

NICE guideline NG246 uses a waist-to-height ratio of 0.5 as a practical screen for central adiposity in adults. WHO's 2008 waist consultation set 94 cm and 102 cm for men of Europid origin, and 80 cm and 88 cm for women, as increased and substantially increased risk. Those lines are not litres of VAT.

Enter sex, height and waist measured midway between the lowest rib and the iliac crest after a normal breath out. You get WHtR, centimetres over or under the 0.5 target, WHO flags, and BRI. For a scan, you need a clinic.

In brief

  • This is a tape proxy. Only CT, MRI or a quantified DEXA report estimates visceral adipose tissue volume.
  • Waist-to-height 0.5 is the first target. Keep the waist under half your height.
  • WHO increased-risk waists are 94 cm (men) and 80 cm (women). Substantially increased are 102 cm and 88 cm.
  • Measure halfway between the lowest rib and the top of the hip bone, after a normal breath out, standing.

Calculator

Fields marked * are required. Results update as you type.

Values you have typed are converted when you switch.

The published formulas were derived separately for male and female physiology. If neither fits you well, run both and read the range.

Midway between the lowest rib and the top of the hip bone, after a normal breath out.

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What you'll see here

Waist-to-height ratio, WHO increased and substantially increased lines, target waist at half your height, and body roundness index, clearly labelled as a tape proxy.

Why a tape is not a VAT scan

Visceral fat is the depot that drains into the portal circulation and tracks more closely with cardiometabolic risk than fat under the skin. CT and MRI can estimate that volume. Consumer scales that print a 'visceral fat level' are using a proprietary impedance model. They are not this page, and they are not a scan.

A waist tape captures abdominal girth, which includes subcutaneous fat, viscera, gas and posture. It still works as a risk screen because large waists are how central fat shows up in populations. WHO said so in 2008. NICE said so again in NG246 by putting WHtR on the pathway.

If a clinician has ordered imaging, believe the imaging. Use this form to watch the tape between visits, not to argue with a report.

Waist-to-height 0.5

Divide waist in centimetres by height in centimetres. A ratio of 0.5 means the waist is half the height. Ashwell and Gibson, among others, showed that this single cut is a strong marker of early health risk and is simpler than a BMI-plus-waist matrix.

NG246 uses 0.5 as the adult action line for central adiposity. This result also prints the waist that would put you exactly on 0.5 (half your height) and how many centimetres you sit above or below it. That centimetre gap is the number you can change with a tape next month.

WHtR does not need sex in the arithmetic. The WHO centimetre lines do. Both are shown because a tall man can have WHtR under 0.5 and still sit on a WHO line, and a shorter woman can do the reverse.

WHO 94 / 102 and 80 / 88 cm

The 2008 WHO expert consultation on waist circumference recommended 94 cm (increased) and 102 cm (substantially increased) for men of Europid origin, and 80 cm and 88 cm for women. Those figures match the earlier European lines used in diabetes and heart-disease risk work.

WHO also noted that Asian populations may need lower waist cut-offs, and that a single global centimetre line is not settled. This form uses the published Europid pair and says so. It does not invent a third ethnicity table.

CDC adult weight assessment still points people at BMI plus waist as a pair. A large waist at a 'healthy' BMI is the case this page is for. Open the BMI calculator if you want that pair on one screen.

Body roundness index

Thomas and colleagues modelled the body as an ellipse and published body roundness index (BRI) as a geometric proxy that tracks body fat and, in their data, visceral adipose tissue better than BMI alone. BRI uses height and waist. It is still not a VAT litre count.

This result shows BRI beside WHtR so you can see a second tape index, not a replacement scan. If BRI and WHtR disagree in tone, trust the centimetre waist and the 0.5 line first. Those are the screens used in guidance.

BRI can be undefined for a physically impossible waist-to-height pair. The form will say so rather than print a nonsense number.

How to place the tape

WHO's protocol is standing, tape horizontal, midway between the lower rib margin and the iliac crest, after a normal expiration, not sucked in and not after a large meal. That is the same protocol as the waist and WHtR pages on this site.

Trouser-size waist (over the iliac crest, on the belt line) is usually larger and is not the WHO point. Under the ribs after a forced breath out is usually smaller. Pick the mid-point and write it down.

The how-to-measure-your-waist guide is the longer walkthrough. Repeat the same point in four weeks. A 1 cm change is inside breathing and posture. A 4 cm change is a signal.

What to do with a raised tape

Central fat falls when total fat falls. Use the deficit and TDEE calculators, keep protein up, and walk. Spot reduction of visceral fat by a device or a 'waist workout' is not a method this site will sell.

Alcohol energy and a large weekend surplus will not show on a Tuesday tape, but they show on a monthly average. The alcohol calculator puts those drinks against TDEE.

This page will not diagnose metabolic syndrome, diabetes or fatty liver. Those need a clinician and blood. The tape is a screen you can repeat at home.

How it's calculated

Waist-to-height ratio

WHtR = waist (cm) ÷ height (cm)

0.5 is the action line used here and in NICE NG246. Target waist (cm) = 0.5 × height (cm).

WHO waist lines

Men 94 cm increased, 102 cm substantial; women 80 cm and 88 cm

WHO 2008 Europid consultation values. Asian populations may need lower lines.

Body roundness index

BRI from height and waist using the Thomas et al. ellipse model

A geometric proxy, not VAT volume. Shown beside WHtR, not instead of it.

Worked example: 178 cm man, 96 cm waist

  1. WHtR = 96 ÷ 178 = 0.54, above the 0.5 line.
  2. Target waist at 0.5 = 0.5 × 178 = 89 cm. The tape is 7 cm above that target.
  3. WHO increased line for men is 94 cm (at or above). Substantial line is 102 cm (below).
  4. The result labels a raised central-fat tape proxy, not a VAT scan, and points to the WHtR page for the single-ratio view.
  5. A 4 cm waist drop over a month, same protocol, is a real change. A 1 cm Tuesday wobble is not.

Where this number is used in the real world

  • A home screen when BMI is 'fine' and the waist is not.
  • Watching centimetres versus the 0.5 height target.
  • Seeing WHO and WHtR on one result before a clinic visit.
  • Repeating the same tape point every four weeks in a cut.
  • Rejecting a scale 'visceral level' that has no published method.

Frequently asked questions

Can this tell me how many litres of visceral fat I have?

No. Visceral adipose tissue volume is an imaging measurement. This page estimates central-fat risk from a tape using WHtR, WHO centimetre lines and BRI. Those screens track population risk and they move when the waist moves, which is why they are useful at home. They do not output litres. A gym scale 'visceral fat rating' is also not litres. If you need volume, that is a clinical scan with a stated method.

Why is 0.5 the target and not BMI 25?

BMI cannot see where fat sits. Two people at BMI 24 can have very different waists and very different risk. Ashwell and others showed WHtR 0.5 as a simple early-risk line. NICE NG246 put that line into UK overweight and obesity management. WHO kept sex-specific centimetre cut-offs because those were already in cardiovascular research. This page shows both rather than picking a fight between them.

Are the WHO numbers right for every ethnicity?

WHO's 2008 consultation said the Europid 94 / 102 and 80 / 88 cm pair is the published set, and that some Asian groups show risk at smaller waists. There is no single global centimetre table this form can defend. If you have a clinician who uses a lower line for your group, obey that line. The WHtR 0.5 target does not need a sex or ethnicity constant, which is one reason guidance has moved toward it.

Where exactly do I put the tape?

Stand, breathe out normally, and place a horizontal tape midway between the bottom of the lowest rib and the top of the hip bone (iliac crest). That is the WHO point used on every waist tool on this site. Do not use the belt line or the navel unless they happen to sit on that mid-point. Measure twice and average. The how-to-measure-your-waist guide is the illustrated version of this paragraph.

Does sit-ups or a sauna belt lower visceral fat?

Spot reduction is not how adipose tissue works. Visceral fat falls when total body fat falls, which means a sustained energy deficit, walking, and enough protein to protect lean mass. Local sweat or muscle burn will not empty the omentum. Use the deficit and walking calculators for the plan, and this tape for the monthly check. Devices that promise VAT loss without a deficit are selling the scan you are not getting.

Should I use BRI instead of waist-to-height?

No. BRI is a second geometric index from height and waist, published as a research proxy for body fat and VAT. Guidance that a clinician will recognise is WHtR 0.5 and the WHO centimetre lines. Read BRI as extra colour. If it disagrees with a waist that is clearly over half your height, the waist is still the number to act on.

Keep going

A single number rarely tells the whole story. Alongside the visceral fat result, the waist-to-height calculator, the BMI calculator, the body fat calculator and the recomp calculator each add a different angle on the same measurements. For the reasoning behind the numbers, read Measure your waist and BMI vs body fat vs waist.

Sources

  1. World Health Organization. Waist Circumference and Waist-Hip Ratio: Report of a WHO Expert Consultation, Geneva, 8-11 December 2008. Geneva: WHO; 2011. www.who.int/publications/i/item/9789241501491
  2. Ashwell M, Gibson S. Waist-to-height ratio as an indicator of early health risk: simpler and more predictive than using a matrix based on BMI and waist circumference. BMJ Open 2016;6:e010159. doi.org/10.1136/bmjopen-2015-010159
  3. Thomas DM, Bredlau C, Bosy-Westphal A, et al. Relationships between body roundness with body fat and visceral adipose tissue emerging from a new geometrical model. Obesity 2013;21:2264-71. doi.org/10.1002/oby.20408

Cite this page

Quoting a figure from here in an article, a report or a piece of coursework? Use whichever of these your style guide asks for.

APA
Campbell, R. (2026). Visceral Fat Calculator. Body Stats. https://bodystats.co/app/visceral-fat-calculator
Plain text
“Visceral Fat Calculator”, Body Stats, last updated 15 September 2026, https://bodystats.co/app/visceral-fat-calculator

Every formula and threshold on this page is written out with its primary source on our methodology page. These results are informational and educational, not a diagnosis or a substitute for professional advice. See the medical disclaimer.

Last updated . Written by Rick Campbell; not medically reviewed. See review status.