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
Free tracker included with every download this week
Height and Weight Graph — Understanding Healthy Ranges in the UK
A height and weight graph is a visual tool that shows the relationship between how tall you are and what weight is considered healthy for that height. In the UK, these graphs are based on NHS guidance and BMI (Body Mass Index) categories. Whether you're checking your own weight management or tracking progress, understanding where you fall on the height and weight scale helps you see at a glance whether your weight is in a healthy range. Our free BMI calculator above gives you a personalised assessment based on your exact height and weight measurements.
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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.
How Height and Weight Graphs Work in the UK
Height and weight graphs plot height on one axis and weight on the other, creating zones that correspond to NHS BMI categories. These zones show:
- Healthy weight range (BMI 18.5–24.9) — the target zone for most UK adults
- Overweight range (BMI 25.0–29.9) — above healthy but not yet obese
- Obese ranges (BMI 30.0 and above) — three severity levels
- Underweight range (BMI below 18.5) — may indicate nutritional concerns
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends slightly lower thresholds due to higher health risks at lower BMI levels. A weight converter tool can help you quickly switch between kilograms, stone, and pounds to find your weight on the graph.
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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.
Why Height and Weight Graphs Matter for Your Health
Height and weight graphs provide important context for weight management and health planning. Knowing where you fall on the graph helps identify if you're at increased risk of weight-related health conditions like type 2 diabetes, high blood pressure, or cardiovascular disease. Even a modest shift towards the healthy weight range can improve health outcomes significantly. If you're considering weight management options — whether lifestyle changes, NHS weight management services, or prescription treatments — understanding your current position on a height and weight graph gives you a baseline to track progress. Use our free progress tracker to log changes over time.
- 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 a healthy height and weight graph show?
A healthy height and weight graph displays the NHS BMI categories plotted against height and weight. The healthy weight zone (BMI 18.5–24.9) shows the target range for most UK adults. Different heights have different weight ranges — taller people naturally weigh more — so the graph accounts for this relationship. You can calculate your exact BMI using our free BMI calculator on this page.
Are height and weight graphs the same for everyone in the UK?
Mostly, yes — but the NHS recommends adjusted thresholds for adults of South Asian, Chinese, Black African, or Black Caribbean heritage. These groups face higher health risks at lower BMI levels, so their healthy weight ranges start at BMI 18.5–22.9 instead of 18.5–24.9. Your GP can advise on the most appropriate guidance for your individual health profile.
How do I know if my height and weight are healthy?
Find your height on the graph's vertical axis and your weight on the horizontal axis, then see which zone they intersect in. If you fall in the healthy weight range (BMI 18.5–24.9), your height and weight relationship is considered healthy by NHS standards. However, BMI doesn't account for muscle mass — athletes may have high BMI but low body fat. A GP can provide personalised assessment.
Can I use a height and weight graph to track weight loss?
Yes — height and weight graphs are useful for visualising progress. Plot your starting point, then replot after weeks or months of weight management to see your movement towards the healthy zone. For detailed tracking, our free progress tracker tool helps you log weight changes over time and spot patterns in your weight management journey.
What if my height and weight put me outside the healthy range?
If your height and weight indicate overweight or obesity according to NHS guidelines, discussing options with your GP is the next step. Options range from lifestyle support (diet, exercise, behaviour change programmes) through NHS weight management services, to prescription treatments if appropriate. Your GP can assess your individual health and recommend the best path forward for you.
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.