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 for UK Adults
A height and weight graph helps you see at a glance where your weight sits relative to your height and whether it falls within a healthy range according to NHS guidance. In the UK, we use stone and pounds or kilograms to measure weight, and these interactive charts are useful screening tools for understanding weight management and overall health. However, a graph alone doesn't tell the full story — your GP can provide personalised advice about what your measurements mean for you specifically.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 Height and Weight Ranges in the UK
The NHS uses BMI (Body Mass Index) as a standard measure to assess healthy weight ranges based on height. BMI is calculated by dividing weight in kilograms by height in metres squared. For UK adults, a healthy BMI falls between 18.5 and 24.9, which means a healthy weight range exists for each height.
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds because these populations face higher health risks at the same BMI levels. Their healthy weight range begins at BMI 18.5 and extends to 22.9 rather than 24.9.
A height and weight graph visually displays these ranges so you can quickly check whether your current weight aligns with NHS guidance for your height. However, BMI has important limitations — it doesn't distinguish between muscle and fat, so athletes or very muscular individuals may have a high BMI despite low body fat. Waist measurement and overall fitness also matter.
Use our free BMI calculator above to determine your personal BMI instantly and see exactly where you fall on the healthy weight scale.
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.
Using Height and Weight Graphs for Weight Management
Height and weight graphs are most useful as a starting point for conversations with your GP about weight management and health. If your graph shows you're outside a healthy range, your GP can explore individual factors — such as medical conditions, medications, genetics, and lifestyle — that affect your weight.
For practical weight tracking, our progress tracker allows you to log your weight over time and visualize your own personal journey. A weight converter is also helpful if you need to switch between metric (kg) and imperial (stone/lbs) measurements when comparing your weight to NHS guidance. Most importantly, remember that weight is just one health marker — energy levels, fitness, blood pressure, and how you feel are equally important.
- 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 a healthy weight range for my height in the UK?
Your healthy weight range depends on your height and BMI. For most UK adults, a BMI of 18.5–24.9 is considered healthy. Use our free BMI calculator above to find your personal healthy weight range for your exact height. Your GP can also discuss what's healthy specifically for you.
Why do height and weight graphs use different thresholds for some ethnic groups?
The NHS recommends lower BMI thresholds (18.5–22.9 instead of 18.5–24.9) for people of South Asian, Chinese, Black African, and Black Caribbean heritage because research shows these groups develop weight-related health conditions like type 2 diabetes at lower BMI levels. This reflects real health differences, not a change in the calculation.
Is BMI the only thing I should look at on a height and weight graph?
No. BMI is a useful screening tool but has limitations. It doesn't account for muscle mass, where fat is stored, or individual health factors. Waist circumference is also important — the NHS recommends measuring waist as well as using BMI for a fuller picture of health risk.
How often should I check my weight against a height and weight graph?
If you're tracking weight for health reasons, weighing yourself weekly is reasonable, though daily weighing can be unhelpful due to natural fluctuations. Our free progress tracker helps you log weight over time and spot genuine trends rather than daily variations.
Should I aim for a specific weight based on a height and weight graph?
Rather than targeting one exact weight, focus on reaching your healthy BMI range for your height — this gives you a range to work within. Your GP or a registered dietitian can help you set realistic, personalised targets based on your health, fitness, and lifestyle, not just a graph.
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.