Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio, a measure the WHO uses to assess health risk related to fat distribution.
Calculate your waist-to-hip ratio, a measure the WHO uses to assess health risk related to fat distribution.
How Waist-to-Hip Ratio Calculator Works
Waist circumference divided by hip circumference gives a simple ratio — since both measurements use the same unit, it doesn't matter whether you measure in inches or centimeters, as the units cancel out.
Who Uses Waist-to-Hip Ratio Calculator and Why
- Checking fat distribution pattern ("apple" vs. "pear" shape) as a screening reference alongside other body composition tools.
- Comparing your ratio against the WHO's commonly cited 0.90 (men) / 0.85 (women) cutoffs mentioned in the calculator's FAQ.
- Tracking waist and hip measurements together over time to see whether fat distribution is shifting, independent of overall weight change.
- Using the ratio as one data point in a broader conversation with a healthcare provider about cardiovascular or metabolic risk factors.
Mistakes to Avoid
- Measuring waist and hip in different units without converting first — the calculator's explanation notes the units need to match since they cancel out in the ratio; mixing inches and centimeters produces a meaningless number.
- Measuring hip circumference at the waist's narrowest point instead of the hips' widest point (or vice versa), which produces a ratio that doesn't reflect the intended landmarks.
- Treating being above the WHO cutoff as a diagnosis rather than a risk indicator — the calculator's FAQ is explicit that individual risk depends on many other factors beyond this one ratio.
Tips for Best Results
- Measure waist at its narrowest point (typically just above the navel) and hips at their widest point, keeping the tape level and snug but not compressing the skin.
- Take both measurements back-to-back in the same session, since factors like recent eating or bloating can shift the waist figure more than the hip figure.
Fixing Common Problems
My ratio seems oddly high or low compared to how my body looks. — Confirm both measurements were taken in the same unit and at the correct landmarks — waist at its narrowest point, hips at their widest — since a unit mismatch or landmark error is the most common cause of an unexpected ratio.
Terms Explained
Waist-to-hip ratio: Waist circumference divided by hip circumference, used by the WHO as a screening indicator for cardiovascular and metabolic risk linked to fat distribution.
Apple vs. pear shape: An informal description of fat distribution pattern — "apple" (more fat around the waist) is associated with higher cardiovascular risk than "pear" (more fat around the hips) at a similar overall body size.