---
title: "BMI Calculator UK — NHS BMI Standard 2025 | World Calculators"
description: "Free UK BMI calculator. 27.8% of UK adults are obese (NHS 2022). Uses NHS/WHO BMI standard. Calculate your Body Mass Index and see how you compare to UK and international averages. No ads."
url: "https://worldcalculators.org/gb/bmi-calculator/"
canonical: "https://worldcalculators.org/gb/bmi-calculator/"
---

# BMI Calculator — United Kingdom

Free UK BMI calculator. 27.8% of UK adults are obese (NHS 2022). Uses NHS/WHO BMI standard. Calculate your Body Mass Index and see how you compare to UK and international averages. No ads.

## Quick answer

WHO normal BMI: 18.5–24.9. In the UK, 27.8% of adults are obese and 63.8% are overweight or obese (NHS Health Survey for England 2022). The NHS uses the same WHO thresholds: healthy weight 18.5–24.9, overweight 25–29.9, obese ≥30. For people of South Asian, Chinese, or Black African/Caribbean background, NHS advises that health risks begin at lower BMI levels (overweight from BMI 23, obese from BMI 27.5).

Source: https://worldcalculators.org/gb/bmi-calculator/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.