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Waist-Hip Ratio Calculator

Ready to calculate
WHO WHR Thresholds.
Gender-Specific Ranges.
Apple vs Pear Shape.
100% Free.
No Data Stored.

How it Works

01Measure Waist

At navel level — soft tape, no compression, normal breathing

02Measure Hips

Around the widest part of buttocks — feet together, horizontal tape

03Divide W ÷ H

Same unit for both — the ratio is dimensionless

04Read Your Risk

WHO thresholds differ by gender — apple vs pear body shape

About the Waist-Hip Ratio Calculator

The Waist-Hip Ratio (WHR) Calculator measures abdominal fat distribution, which research has shown to be a stronger predictor of cardiovascular and metabolic disease risk than BMI alone. Visceral fat stored around the midsection is metabolically active and inflammatory; gluteofemoral fat is largely benign. WHR captures this distinction in a single ratio.


Divide waist circumference by hip circumference. The World Health Organization defines elevated risk as >0.90 for men and >0.85 for women. The calculator returns your ratio, the WHO risk band, and contextual guidance — all without storing any of your measurements.

How the Calculator Works

Measure waist: at the narrowest point above the navel and below the rib cage. Don't suck in. Tape parallel to the floor.
Measure hips: at the widest point around the buttocks. Tape parallel to the floor.
Enter both values in cm or inches — the calculator handles unit conversion.
Apply the formula: WHR = waist ÷ hips.
Read the WHO classification: low risk, moderate risk, or high risk based on your sex.

The Math Behind It

WHR = Waist Circumference ÷ Hip Circumference


WHO risk thresholds (2008 expert consultation):


Men: ≤0.90 low risk · 0.91–0.99 moderate · ≥1.00 high
Women: ≤0.85 low risk · 0.86–0.89 moderate · ≥0.90 high

Real-World Example

Worked Example

Female, waist 78 cm, hips 102 cm:

StepCalculationResult
Waist—78 cm
Hips—102 cm
WHR78 ÷ 1020.76
WHO classification (women)0.76 ≤ 0.85Low risk ✓

Who Uses It

1
❤️ Cardiovascular Risk Screening: Identify abdominal-obesity-driven heart disease risk before clinical metrics flag it.
2
🩺 Primary Care: A 30-second screening that complements BMI and blood pressure.
3
📈 Weight Management: Track abdominal fat changes that may not show on a scale.
4
🏋️ Body Recomposition: Validate that fat loss is targeting visceral stores, not just gluteofemoral.
5
👔 Suit & Apparel Tailoring: Useful tailoring reference, even outside health context.
6
📊 Population Health Studies: Standardized field measurement for epidemiological work.

Final Thoughts

Waist-hip ratio is one of the simplest yet most predictive anthropometric measurements in cardiovascular medicine. Studies (INTERHEART, Lancet 2005) found WHR more strongly associated with myocardial infarction risk than BMI. The ToolsACE WHR Calculator gives you the WHO-standard interpretation — a useful screening tool, not a diagnosis.

Frequently Asked Questions

Is WHR better than BMI?
For cardiovascular and diabetes risk, yes. BMI doesn't distinguish fat distribution; a 'normal-BMI' person with an apple-shaped silhouette can have higher cardiometabolic risk than a higher-BMI person with even fat distribution.
How do I measure my waist correctly?
Stand relaxed, exhale normally. Place tape at the natural waist — typically halfway between the lowest rib and the iliac crest (top of hip bone). Don't pull tight; don't suck in. Most people measure too high (over the navel).
Where exactly are 'hips'?
The widest part of your buttocks, viewed from the side. Tape parallel to the floor, no slack. For men this is often surprisingly low — keep moving the tape until you find the maximum girth.
Why are the thresholds different for men and women?
Women carry a higher proportion of fat in the gluteofemoral region naturally (estrogen-driven). The same WHR represents more abdominal-relative deposition in a woman than in a man. WHO thresholds account for this baseline difference.
Can WHR change quickly?
Modestly. Visceral fat is more metabolically active and responds faster than subcutaneous fat to dietary changes. Expect 0.02–0.04 WHR shift over 2–3 months of consistent caloric deficit + resistance training.
Is a very low WHR healthy?
Below 0.7 in women is uncommon and may indicate either very low body fat or unusual fat distribution. It's not pathological in itself, but extreme outliers can reflect underlying conditions worth a clinical conversation.
Should I use waist-to-height ratio instead?
Both are useful. Waist-to-height (target <0.5) is even simpler and works without hip measurement. WHR captures distribution; WHtR captures abdominal mass relative to frame size. Many clinicians use both.
Does muscle gain change my WHR?
Hip-area muscle gain (from squats, deadlifts) increases hip circumference and lowers WHR even if waist stays the same. This is a desirable shift — more lean mass, similar fat.
Can pregnancy affect WHR?
Yes — significantly during and post-pregnancy. WHR is not a useful metric during pregnancy or in the first 3–6 months postpartum.
Is my data private?
Yes. All calculations are local to your browser. Your measurements are not stored or transmitted.

Author Spotlight

The ToolsACE Team - ToolsACE.io Team

The ToolsACE Team

Our health tools team implements the WHO waist-hip ratio thresholds — a long-standing cardiometabolic risk marker that captures body-fat distribution (apple vs pear shape) and has been validated across large international cohorts.

WHO WHR ThresholdsBody Fat Distribution MarkersSoftware Engineering Team

Medical Disclaimer

WHR is a screening metric, not a diagnostic test. Cardiovascular and metabolic risk is multifactorial — discuss findings with your healthcare provider in the context of blood pressure, lipids, glucose, and family history.