Waist-to-Height Ratio Calculator

What this tool does

This ratio is often summarised as "keep your waist below half your height", and it captures something BMI misses: where body fat sits rather than how much there is in total. Measure the waist at the midpoint between the lowest rib and the top of the hip bone, after breathing out normally.

Formula

ratio = waist perimeter ÷ height

Variables

Worked example

Limitations

• This tool is informational only. It does not diagnose, treat or replace a qualified health professional. Speak to a doctor before making decisions about your health.
• The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.