Waist to height ratio works across adult sexes and ethnicities with one threshold, which makes it a practical screening tool.
How to use the Waist to Height Ratio Calculator
- Waist circumference
- Height
Results update as you type, and every field accepts the units shown in its menu.
How it works
Divide waist by height in the same unit. Values of 0.4–0.49 are generally considered healthy.
Inputs explained
| Field | What to enter |
|---|---|
| Waist circumference | Units: cm, m, mm, in, ft |
| Height | Units: cm, m, mm, in, ft |
What each result means
- Waist to height ratio = [Waist circumference] ÷ [Height]
- Waist for a ratio of 0.5 = [Height] × 0.5
Example values
How the main result changes when Waist circumference changes and everything else stays at the example values above:
| Waist circumference (cm) | Waist to height ratio |
|---|---|
| 42 | 0.24 |
| 63 | 0.36 |
| 84 | 0.48 |
| 105 | 0.6 |
| 126 | 0.72 |
| 168 | 0.96 |
Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.
Formula
WHtR = waist ÷ heightWorked example
Inputs — Waist circumference: 84 cm; Height: 175 cm.
Results — Waist to height ratio = 0.48; Waist for a ratio of 0.5 = 87.5 cm.
Frequently asked questions
What is the target?
Keep your waist to less than half your height.
Does it work for children?
The 0.5 cut-off is also used for children over 5 in some guidance.
What formula does the Waist to Height Ratio Calculator use?
WHtR = waist ÷ height.