Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio (WHtR) in seconds. Enter your waist measurement and height to understand how your waist size compares with your height, using commonly referenced adult health categories.
Enter your measurements
Your results
WHtR resultYour ratio is in the 0.50–0.59 reference range. This is a screening indicator, not a diagnosis.
The reference point is a general screening guide. It is not an individualized waist-size prescription.
What does your waist-to-height ratio mean?
Waist-to-height ratio compares waist circumference with height. It can complement BMI because it considers where body fat is carried, particularly around the abdomen. For adults, the categories below reflect commonly used NICE guidance; they do not predict an individual’s health outcome with certainty.
0.40–0.49: Lower reference range
This range is classified as healthy central adiposity in the referenced guidance. A ratio below 0.40 falls outside that specific category and needs context rather than an automatic judgment.
0.50–0.59: Increased range
This range is associated with increased health risk at a population level. Consider discussing your overall health and risk factors with a qualified healthcare professional.
0.60 or higher: High range
This range is associated with a further increase in health risk. A healthcare professional can help interpret the result alongside your medical history and other measurements.
| Waist-to-height ratio | General adult category |
|---|---|
| 0.40–0.49 | Healthy central adiposity reference range |
| 0.50–0.59 | Increased central adiposity |
| 0.60 and above | High central adiposity |
These categories are not a diagnosis and are not a substitute for professional medical advice. The commonly used adult classification is generally intended for people with a BMI below 35; seek professional guidance if this does not apply to you.
How to calculate waist-to-height ratio
The waist-to-height ratio formula is simple: divide your waist circumference by your height. Both measurements must use the same unit, such as inches or centimeters.
Example calculation
Suppose your waist circumference is 38 inches and your height is 67 inches.
The result is approximately 0.57, which falls within the 0.50–0.59 increased central adiposity range in the reference classification.
Formula
To find the 0.50 reference point, multiply your height by 0.5. For example, someone who is 67 inches tall has a half-height reference of 33.5 inches. This is a screening reference, not a required target for every individual.
How to measure your waist correctly
1. Find the measurement point
Locate the midpoint between the bottom of your ribs and the top of your hip bones.
2. Stand naturally
Keep the tape level around your body, breathe out naturally, and avoid pulling your abdomen inward.
3. Enter both measurements
Measure your height and waist in the same units, then calculate your ratio above.
Frequently asked questions
What is a good waist-to-height ratio?
For adults, a ratio from 0.40 to 0.49 is classified as healthy central adiposity in NICE guidance. A commonly used general message is to keep waist circumference below half of height. However, this measure is only one part of assessing health and should be interpreted in context.
How do I calculate waist-to-height ratio in inches?
Measure your waist and height in inches, then divide your waist measurement by your height. For example, 32 inches divided by 64 inches gives a ratio of 0.50. You can use the calculator above to do the calculation automatically.
Can I use centimeters instead of inches?
Yes. The formula works with any consistent unit. For example, a waist of 80 cm divided by a height of 160 cm gives a ratio of 0.50. Select Metric (cm) above to enter centimeters.
Is waist-to-height ratio better than BMI?
They measure different things. BMI uses weight and height, while waist-to-height ratio compares waist size with height and provides information about abdominal fat distribution. Each has limitations, so a healthcare professional may consider both alongside other health information.
Does a high waist-to-height ratio mean I have a disease?
No. A higher ratio is a screening indicator associated with greater risk at a population level, not a diagnosis. If your result concerns you, discuss it with a qualified healthcare professional who can assess your individual circumstances.
Who should not rely on this calculator alone?
This page provides a general adult screening estimate. It is not intended to assess pregnancy-related measurements or diagnose health conditions. Children and teenagers require age-appropriate interpretation. Ask a healthcare professional for guidance if you have a medical condition, a BMI of 35 or above, or concerns about your measurements.
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