What is a healthy waist circumference for your age and sex?
Compare your waist size to 21,400+ adults and see your WHO risk category in 10 seconds.
percentile
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What Your Waist Circumference Means
Waist circumference measures abdominal obesity, which is strongly linked to:
- Type 2 diabetes and insulin resistance
- Cardiovascular disease
- Metabolic syndrome
- Sleep apnea
The WH0 classifies health risk based on absolute cutoffs — not percentiles. Even a modest 5 cm reduction in waist circumference can significantly improve metabolic health.
How to Measure Your Waist Correctly
- Find the top of your hip bone (iliac crest)
- Wrap a tape measure around your abdomen at this level
- Ensure the tape is horizontal and snug but not tight
- Measure at the end of a normal exhale
- Record to the nearest 0.1 cm or 0.5 inch
Frequently asked questions
Quick answers to common questions
What is the average waist circumference for a 40 year old man?
The average US waist circumference for a 40-year-old man is approximately 101 cm (40 in), with 90% of men falling between 83 and 120 cm. Use the calculator above to find your exact percentile.
What is a healthy waist circumference for women by age?
For women, a healthy waist circumference is generally below 80 cm (31.5 in), with elevated risk between 80–88 cm and high risk above 88 cm. These WH0-recommended cutoffs apply regardless of age.
How to measure waist circumference correctly?
Stand and place a tape measure around your abdomen at the level of the iliac crest (hip bone). Ensure it is snug but not compressing the skin. Measure at the end of a normal exhale. Do not hold your breath or suck in.
Is waist circumference or BMI more important?
Both matter, but waist circumference is a stronger predictor of visceral fat and cardiovascular risk. Two people with the same BMI can have very different waist sizes and health outcomes.
What is the average waist size by age and gender?
Waist circumference typically increases with age in both genders, peaking around age 50-60, then stabilizing. Men average 95-105 cm and women average 85-100 cm depending on age group.
What waist circumference percentile is considered high risk?
The WHO uses absolute cutoffs (94/102 cm for men, 80/88 cm for women) rather than percentiles. However, a waist circumference above the 75th percentile generally corresponds to elevated health risk for your age and gender.
References
Peer-reviewed sources behind this calculator
- Centers for Disease Control and Prevention (2024). National Health and Nutrition Examination Survey. NHANES 2011-2023 Body Measures Data (BMXWAIST).
- World Health Organization (2008). WHO Technical Report. Waist circumference and waist-hip ratio: report of a WHO expert consultation.
- Janssen I, Heymsfield SB, Allison DB, Kotler DP, Ross R (2002). American Journal of Clinical Nutrition. Body mass index and waist circumference independently contribute to the prediction of nonabdominal, abdominal subcutaneous, and visceral fat. doi:10.1093/ajcn/75.4.683
Show all 4 references
- Klein S, et al. (2007). American Journal of Clinical Nutrition. Waist circumference and cardiometabolic risk: a consensus statement from Shaping America's Health. doi:10.1093/ajcn/85.5.1197
Methodology & Data Source
Data: NHANES 2011-2023 (5 cycles, n=21,400). Waist circumference measured at the iliac crest.
WHO risk thresholds: Men — low <94 cm, elevated 94–102 cm, high >102 cm. Women — low <80 cm, elevated 80–88 cm, high >88 cm.
Disclaimer: For informational purposes only. Not medical advice.
Privacy: All calculations happen in your browser. We don't store your data.