The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
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BMI Height Weight Table for UK Adults
A BMI height weight table shows the relationship between your height, weight, and BMI category according to NHS guidelines. This guide explains how to use a BMI table to find your healthy weight range, understand your BMI category, and see how different weights affect your health status. We've included practical tables and tools to help you find where you stand.
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Calculate Your BMI Instantly
Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
Understanding BMI Categories and Healthy Weight Ranges
The NHS BMI formula is weight (kg) ÷ height (m)². A BMI height weight table translates this into easy-to-read ranges. For UK adults, the standard BMI categories are:
- Under 18.5 — Underweight
- 18.5–24.9 — Healthy weight (the target range)
- 25.0–29.9 — Overweight
- 30.0–34.9 — Obese (Class I)
- 35.0–39.9 — Obese (Class II)
- 40.0+ — Severely obese (Class III)
For example, at 1.73m tall (5ft 8in), a healthy BMI range is approximately 55–74 kg (8st 10lbs to 11st 10lbs). However, if you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — healthy BMI starts at 18.5 and the overweight threshold is 23.0 rather than 25.0. Use our free BMI calculator above to find your exact BMI instantly.
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How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
BMI Limitations and What Else Matters
A BMI height weight table is a useful screening tool, but it has important limitations. BMI doesn't distinguish between muscle and fat — an athlete may have a high BMI but very low body fat. BMI also ignores where fat is stored; excess weight around the waist carries greater health risk than weight distributed elsewhere. Additionally, BMI is less accurate for older adults (who may have lost muscle), during pregnancy, and for very tall or very short individuals.
For a more complete picture, measure your waist circumference alongside BMI. The NHS recommends under 94 cm (37in) for men and under 80 cm (31.5in) for women. Your GP can discuss your personal health context and whether your weight poses health risks.
A BMI height weight table is a useful screening tool, but it has important limitations. BMI doesn't distinguish between muscle and fat — an athlete may have a high BMI but very low body fat. BMI also ignores where fat is stored; excess weight around the waist carries greater health risk than weight distributed elsewhere. Additionally, BMI is less accurate for older adults (who may have lost muscle), during pregnancy, and for very tall or very short individuals.
For a more complete picture, measure your waist circumference alongside BMI. The NHS recommends under 94 cm (37in) for men and under 80 cm (31.5in) for women. Your GP can discuss your personal health context and whether your weight poses health risks.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
How do I use a BMI height weight table?
Find your height on the left column, then trace across to your weight. Where they meet shows your BMI category. Alternatively, use our free BMI calculator above — it's faster and more precise. The BMI formula is weight (kg) ÷ height (m)².
What is a healthy BMI range according to the NHS?
The NHS defines healthy BMI as 18.5 to 24.9 for most UK adults. For South Asian, Chinese, Black African, and Black Caribbean adults, the healthy range is 18.5 to 22.9 due to higher health risks at higher BMI levels. Your GP can advise on your personal target.
Why are BMI thresholds lower for South Asian and Black African adults?
Research shows these population groups have higher risk of type 2 diabetes and cardiovascular disease at lower BMI levels. The NHS recommends lower BMI thresholds for these groups to ensure earlier intervention and better health outcomes.
Can I be overweight according to a BMI table but still be healthy?
Yes — BMI doesn't account for muscle mass. Athletes and very muscular individuals can have high BMI but low body fat. Combine BMI with waist circumference measurement and discuss your overall health with your GP for a complete picture.
What's the difference between BMI and body composition?
BMI measures weight relative to height. Body composition measures the ratio of muscle to fat. Two people with identical BMI can have very different body compositions. Consider both metrics alongside your waist measurement for comprehensive health assessment.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.