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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Weight vs Height Chart — UK Health Guidance
A weight vs height chart helps you understand whether your weight is within a healthy range for your specific height. In the UK, we use NHS-aligned BMI categories to determine healthy weight ranges, which account for both your height and weight together. This guide explains how to use a weight vs height chart, what the NHS considers healthy, and how to find your personal healthy weight range using our free BMI calculator and weight converter.
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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 Healthy Weight Ranges by Height
The NHS defines healthy weight using BMI (Body Mass Index), which combines your height and weight into a single number. A healthy BMI for most UK adults is 18.5 to 24.9. For each height, there is a specific weight range that falls within this healthy zone.
- At 5ft 4in (163cm), a healthy weight ranges from approximately 48–64kg (7st 8lbs–10st 1lb)
- At 5ft 8in (173cm), a healthy weight ranges from approximately 55–74kg (8st 9lbs–11st 10lbs)
- At 6ft (183cm), a healthy weight ranges from approximately 63–85kg (9st 13lbs–13st 5lbs)
However, BMI has limitations—it doesn't distinguish between muscle and fat, so athletes or very muscular individuals may have a higher BMI despite low body fat. The NHS also recommends measuring waist circumference alongside weight, as where fat is stored matters for health. Additionally, for adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower healthy weight thresholds due to higher health risks at equivalent BMI levels.
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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.
Using a Weight vs Height Chart in UK Context
The most practical way to find your healthy weight range is to calculate your personal BMI. Use our free BMI calculator above by entering your height and weight in either metric (kg and cm) or imperial (stone and pounds) measurements—whichever you prefer. The calculator will instantly tell you which NHS category you fall into and what your healthy weight range should be.
If you need to convert between stone and kilograms, use our free weight converter tool. Once you know your BMI, discuss the results with your GP, especially if you're considering weight management, as they can provide personalised guidance based on your individual health, medical history, and any weight-related conditions.
- 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 is the healthy weight range for someone who is 5ft 6in tall?
At 5ft 6in (168cm), the healthy BMI range of 18.5–24.9 corresponds to approximately 51–70kg (8st–11st). However, your ideal weight within this range depends on factors like muscle mass, bone density, and overall health. Use our free BMI calculator to check your personal BMI instantly.
Why does the NHS use different weight thresholds for different ethnic backgrounds?
Research shows that people of South Asian, Chinese, Black African, and Black Caribbean heritage face higher risks of type 2 diabetes and cardiovascular disease at lower BMI levels compared to other populations. The NHS therefore recommends a healthy BMI of 18.5–22.9 for these groups, rather than 18.5–24.9, to better protect their health.
Is weight vs height chart the same as BMI?
A weight vs height chart visually represents the relationship between height and weight, typically showing healthy weight ranges. BMI is the mathematical calculation (weight in kg ÷ height in metres squared) used to determine where you fall on that chart. Our weight converter and BMI calculator both use the same underlying NHS guidance.
What should I do if my weight is outside the healthy range on a weight vs height chart?
If your weight falls outside the healthy range for your height, discuss this with your GP. They can assess your individual circumstances, check for weight-related health conditions, and suggest appropriate support—which may include lifestyle changes, referral to NHS weight management services, or prescription weight loss treatment if eligible.
Does muscle weight affect where I appear on a weight vs height chart?
Yes. BMI and weight vs height charts don't distinguish between muscle and fat. If you're very muscular or athletic, you may have a higher BMI despite low body fat. Your GP can assess your overall health beyond BMI, and measuring waist circumference alongside BMI provides additional useful health information.
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.