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Nutrition & Sports Medicine Guideline-based screening metric Source-mapped educational formula Routine educational estimate

Waist-to-Height Ratio Calculator

Calculate waist-to-height ratio and compare it with NICE central-adiposity categories.

Use calculator View formula

Interactive tool

Calculator

Enter values carefully. Results appear after calculation and should be interpreted with the safety notes and source method on this page.

Source-mapped educational formula

Step 1 — Enter inputs

5 fields required for this tool

Step 2 — Review the result

The result area updates below and keeps safety wording visible.

Result

Complete the form and select Calculate.

About this calculator

Waist-to-height ratio is a simple screening measure for central adiposity. It can complement BMI because it reflects abdominal size relative to height.

Source-backed
Waist-to-height ratio = waist circumference ÷ height. NICE classifies 0.5–0.59 as increased central adiposity and 0.6 or more as high central adiposity.
Review status
Source-mapped educational formula
Limitations
Educational estimate only; not a diagnosis, prescription, or treatment plan.

Formula and method

Waist-to-height ratio = waist circumference ÷ height, using the same units for both measurements.

Medical safety note: This page is for education only and should not replace professional medical advice. For emergencies, medication decisions, or severe symptoms, contact a qualified clinician or local emergency service.

Limitations and when not to rely on this result

  • Educational estimate only; not a diagnosis, prescription, or treatment plan.
  • Result depends on accurate inputs and may not apply to complex medical situations.
  • Use clinician judgment, local guidance, and urgent care pathways when symptoms are severe.

Frequently asked questions

What is waist-to-height ratio? +

It is waist circumference divided by height using the same units.

What ratio is considered increased? +

NICE classifies 0.5 to 0.59 as increased central adiposity and 0.6 or more as high central adiposity.

Is this better than BMI? +

It measures a different risk marker. It can complement BMI but does not replace a full health assessment.

Can children use this? +

NICE applies categories to children and young people age 5 and older, but growth and puberty should be considered.

Can pregnancy affect the result? +

Yes. Pregnancy and postpartum changes make waist-based screening less appropriate without clinician guidance.