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Adult BMI calculator — WHO global reference

Calculate BMI for adults aged 20+ using the WHO global adult thresholds.

Limited scopePreliminary referenceWHO global thresholds · Adults aged 20+
Saves this tool's name on this device only (up to 20). No form values.
Only visible result text is included. Form fields are not read. Review sensitive values before sharing.

WHO global adult thresholds, not Asian-specific thresholds. For adults aged 20+ who are not pregnant. Not suitable for children, teenagers or highly muscular athletes.

BMI does not distinguish muscle from fat. A health professional can assess this together with other measurements. This does not provide a treatment or weight-loss plan.

Enter values, then process to see the result.

How to use it

  1. Read the adult scope and confirm it applies.
  2. Enter weight in kilograms and height in centimetres.
  3. Review the indicator with the stated limitations.

Important limitation

For adults aged 20+ who are not pregnant. Not suitable for children, teenagers or highly muscular athletes. WHO global thresholds are not Asian-specific cutoffs. BMI is a screening indicator, not a diagnosis or treatment plan; consult a health professional for a personal assessment.

The interactive form is fully localized in English.

Reviewed 2026-09-09; next review 2026-12-09.

WHO formula and reference boundaries have been checked. Limited to adults who are not pregnant; this is not a medical professional's certification.

Sources

Obesity and overweight — adult BMIWorld Health Organization · opens in a new tabSupports the method and scope stated on the tool page; consult the source for case-specific rules.Source checked 2026-09-09Body mass index — adult indicatorsWorld Health Organization · opens in a new tabSupports the method and scope stated on the tool page; consult the source for case-specific rules.Source checked 2026-09-09
Recorded updates

Review history

Site changelog

Dates describe the review scope recorded below. A page update does not mean every source was checked again.

  1. Last recorded source/method review

    WHO formula and reference boundaries have been checked. Limited to adults who are not pregnant; this is not a medical professional's certification.