Convert your waist size from inches to cm or cm to inches, switch body weight between pounds and kilograms, or find your waist-to-height ratio.
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Waist-to-Height Ratio (WHtR) Formula
There is no medically valid, universal formula that converts body weight (pounds) into waist circumference (inches) for an individual. However, a widely used screening metric is the waist-to-height ratio (WHtR), which compares your measured waist circumference to your height.
Variables:
- WHtR is the waist-to-height ratio (unitless)
- W is your waist circumference (in or cm)
- H is your height (in or cm)
To calculate WHtR, divide measured waist by height in matching units. This calculator limits health-reference interpretation to adults aged 18 or over with BMI below 35, alongside BMI, following NICE guidance. Do not use this health interpretation during pregnancy, with an eating disorder or with a condition affecting height. The 0.5 value is a screening boundary, not a personal target or diagnosis; advice for eligible adults is to remain below half-height.
| Height (in) | Reference Waist (in) |
|---|---|
| 58 | 29.0 |
| 60 | 30.0 |
| 62 | 31.0 |
| 64 | 32.0 |
| 66 | 33.0 |
| 68 | 34.0 |
| 70 | 35.0 |
| 72 | 36.0 |
| 74 | 37.0 |
| 76 | 38.0 |
| 78 | 39.0 |
| Formula: WHtR = waist ÷ height. At the 0.5 boundary, reference waist = 0.5 × height in matching units. This is not a personal target. Exact unit definitions: 1 lb = 0.45359237 kg; 1 in = 2.54 cm. | |
What is the Pounds to Waist Inches Calculator?
This page provides a weight and waist unit converter (lb↔kg, in↔cm) and a waist-to-height ratio (WHtR) calculator. While people often search for a “pounds to waist inches” conversion, waist circumference can’t be accurately predicted from body weight alone because it varies with height, sex, body composition, fat distribution, age, and other factors.
How to Calculate Waist-to-Height Ratio?
The following steps outline how to calculate waist-to-height ratio (WHtR).
- Measure waist circumference midway between the bottom ribs and top hips, after breathing out naturally, in inches or centimeters.
- Measure your height (H) in the same unit (inches or centimeters).
- Divide waist by height: WHtR = W ÷ H.
- For eligible adult screening, compare with the 0.5 boundary alongside BMI. Exactly 0.5 is the boundary, not below it. This reference does not diagnose a condition or set an individual waist goal.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Waist (W) = 34 in
Height (H) = 68 in
Using the formula, WHtR = W / H, we can calculate the waist-to-height ratio.
WHtR = 34 / 68 = 0.50
