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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Height Weight BMI Table — NHS Health Reference
A height weight BMI table is a quick reference guide showing how body mass index changes across different heights and weights. Using the standard BMI formula, this table helps UK adults find their position on the NHS BMI scale and understand what their measurement means for their health. Whether you're 5ft 4in or 6ft 2in, checking your height and weight against NHS categories gives you an immediate sense of whether you're in the healthy, overweight, or obese range. Our free BMI calculator above makes finding your exact BMI instant, but understanding the broader BMI range uk context helps you see how weight varies across different heights.
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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.
NHS BMI Categories and Healthy Weight Ranges
The NHS BMI categories are the standard UK health framework for weight classification. According to NHS guidance, a healthy BMI is between 18.5 and 24.9, while the overweight BMI threshold begins at 25.0. Obesity starts at 30.0, with further subdivisions into Class I (30.0–34.9), Class II (35.0–39.9), and Class III (40.0+).
For most UK adults, these categories apply equally. However, if you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds: a healthy BMI becomes 18.5–22.9, with overweight beginning at 23.0. This is because these populations face higher cardiovascular and diabetes risk at lower BMI levels.
- Healthy BMI: 18.5–24.9 (or 18.5–22.9 for indicated ethnicities)
- Overweight: 25.0–29.9 (or 23.0–27.4)
- Obese: 30.0 and above
Use the BMI calculator on this page to find your exact BMI instantly and see which NHS category applies to you.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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.
NHS Weight Management Support and When to Seek Help
The NHS weight management pathway offers support across four tiers, depending on your needs. Tier 1 includes free self-help resources, digital tools, and community weight loss programmes available through your GP. Tier 2 involves primary care-based behaviour change support. Tier 3 offers specialist multidisciplinary weight management services, where prescription medications like GLP-1 injections may be discussed. Tier 4 covers bariatric surgery for severe obesity with significant health complications.
If your BMI is above 25, or if you have weight-related health concerns like high blood pressure, type 2 diabetes risk, or sleep apnoea, speak to your GP. They can assess your individual situation, discuss lifestyle changes, and refer you to appropriate NHS support. Even modest weight loss—5–10% of your body weight—can meaningfully improve health outcomes.
- 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.
What does BMI actually measure?
BMI (body mass index) is a simple calculation of weight divided by height squared. It's a screening tool that indicates whether someone may be carrying excess weight that could affect health. However, BMI limitations exist — it doesn't distinguish between muscle and fat, so athletes may have a high BMI despite low body fat. Your GP can assess BMI alongside other factors like waist circumference and overall health.
Is the BMI table the same for everyone in the UK?
The standard NHS BMI categories apply to most UK adults. However, the NHS specifically recommends lower thresholds for people of South Asian, Chinese, Black African, and Black Caribbean heritage due to higher disease risk at lower BMI levels. Your GP can discuss which categories are most relevant for you based on your ethnicity and individual health profile.
What's considered a healthy BMI range?
According to NHS guidance, a healthy BMI range is 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. Use our free BMI calculator to find your exact BMI and see where you fall on the healthy BMI scale immediately.
How do I use a height weight BMI table to find my BMI?
Find your height on the left column and your weight on the top row, then locate where they intersect — that's your approximate BMI. However, for precise results, use our free BMI calculator above, which gives exact figures and automatically shows you which NHS category you fall into based on your height and weight.
When should I contact my GP about my BMI?
Contact your GP if your BMI is above 25, or if you have weight-related health concerns like high blood pressure, type 2 diabetes risk, or sleep apnoea. You should also reach out if you're struggling to manage your weight despite lifestyle changes. Your GP can discuss NHS support options, from Tier 1 self-help through to specialist services, and refer you appropriately.
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.