Calculate your waist-to-height ratio to assess central obesity and health risk.
Use the calculator to estimate a health or fitness number, then compare it with trends over time and other relevant context.
These tools are for education and planning. They do not replace medical advice.
Waist-to-height ratio (WHtR) is a measure of central obesity calculated by dividing waist circumference by height. A ratio above 0.5 indicates increased health risk. It is considered a better predictor of cardiovascular risk than BMI for some populations.
A healthy WHtR is below 0.5 for most adults. The guideline "keep your waist circumference to less than half your height" is a simple rule. Ratios above 0.5 indicate increased risk of metabolic syndrome, diabetes, and cardiovascular disease.
Measure your waist at the narrowest point, usually just above the belly button. Stand upright, breathe normally, and measure after exhaling. Keep the tape snug but not tight. Do not pull in your stomach.
WHtR may be a better indicator of health risk than BMI because it accounts for central (abdominal) fat, which is more strongly linked to metabolic disease. However, both are screening tools with limitations. Use them together for a fuller picture.
Last updated: May 27, 2026 | Reviewed by Body Tally Team
Use the waist-to-height ratio calculator to compare waist circumference with height. This simple ratio can add useful context because central body fat distribution may matter even when BMI looks average.
Body Tally keeps the calculator near the top of the page and adds this guide so you can understand what the tool does, how the inputs affect the result, and what the result can and cannot tell you. Health and fitness formulas are useful for planning, but they work best when treated as estimates and compared with real trends, symptoms, training history, and professional guidance when appropriate.
Waist-to-height ratio equals waist circumference divided by height. Both measurements must use the same units.
The formulas use simplified inputs so they can be calculated quickly in a browser. They do not know your medical history, medications, hormones, lab results, training recovery, sleep, stress, or diagnosis. Use the answer as a starting point, then refine it with consistent measurements and qualified advice when the decision affects health.
Calculator results are useful for learning and planning, but they should not be the only basis for decisions when symptoms, medications, chronic conditions, pregnancy, eating disorder history, injury, or major changes in activity are involved.
If the estimate feels surprising, repeat the measurement, check your unit settings, compare one related calculator, and read the matching guide before acting on the number. Body Tally is built to help you ask better questions, not to replace qualified care.
It compares waist circumference with height.
It adds body shape context BMI does not capture.
Yes. Consistency matters.