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
What Is an NHS Weight Graph and How to Use It?
An NHS weight graph is a visual tool that shows healthy weight ranges for different heights, helping UK adults understand whether their weight falls within a safe zone for their health. The NHS uses weight guidance and BMI charts to help people assess their current weight status and identify health risks. These graphs are essential references for NHS health advice and form the basis of weight management recommendations across UK healthcare services. Understanding your position on an NHS weight graph can motivate positive health changes and help you track progress over time. Many people find visual graphs easier to interpret than raw numbers, making them valuable for long-term weight management planning.
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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 NHS Weight Graphs Work
NHS weight graphs display healthy weight ranges across different heights, typically shown as coloured bands: green for healthy weight, yellow for overweight, and red for obese. These graphs are based on BMI (Body Mass Index) categories that NHS guidance has established. A healthy BMI sits between 18.5 and 24.9 for most UK adults, though lower thresholds apply to people of South Asian, Chinese, Black African, and Black Caribbean heritage due to higher health risks at lower weights.
- The horizontal axis shows height (in cm or feet/inches)
- The vertical axis displays weight (in kg, stone, or pounds)
- Your point on the graph indicates your weight status category
- Regular plotting shows your weight trajectory over time
To find your position, locate your height on the bottom, run upwards, then find your weight on the left side. Where these intersect is your current position. Many people use our free BMI calculator above to determine their exact category instantly, though weight graphs offer a visual overview that helps contextualise your weight within the broader population.
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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 NHS Weight Graphs for Tracking Progress
Plotting your weight on an NHS graph monthly or quarterly creates a visual record of your progress, making trends easier to spot than looking at numbers alone. This approach supports sustainable weight management by showing whether you're moving towards a healthier weight range. Our free weight converter helps you switch between kg, stone, and pounds so you can plot your weight in whichever unit your NHS records use.
If you're working with your GP on weight management, ask whether they have NHS weight graphs available, or access them through NHS England resources online. Regular tracking alongside NHS guidance on diet and physical activity helps you stay motivated and accountable to health goals. For those considering prescription weight loss support, understanding your starting position on the graph makes it easier to track the impact of any medical interventions alongside lifestyle changes.
- 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 weight range is healthy according to NHS weight graphs?
According to NHS guidance, a healthy BMI sits between 18.5 and 24.9 for most UK adults. On an NHS weight graph, this is typically shown as the green band. For example, at 5ft 8in (173cm), the healthy weight range is approximately 55–74kg (8st 7lbs to 11st 9lbs). Lower thresholds apply to South Asian, Chinese, Black African, and Black Caribbean adults — consult your GP for personalised guidance.
How often should I plot my weight on an NHS weight graph?
Most health professionals recommend plotting weight monthly or quarterly to track meaningful progress without obsessing over daily fluctuations. Weekly plotting can be demoralising due to natural water weight variations. Aim for consistency — same day, similar time — for reliable readings. Our free progress tracker makes recording and visualising long-term trends much easier than a UK pharmacy graphing.
Are NHS weight graphs accurate for everyone?
NHS weight graphs use BMI, which has limitations. BMI doesn't distinguish between muscle and fat, so athletes may appear overweight despite low body fat. Additionally, waist circumference matters — where you carry weight affects health risk. Your GP can provide context beyond the graph and assess your individual health picture.
Where can I find an official NHS weight graph?
NHS weight graphs are available through NHS England's weight management resources, your GP practice, and public health websites. Many NHS-funded weight management services provide personalised graphs. You can also use our free BMI calculator above, which instantly shows your category against NHS healthy weight ranges.
Can NHS weight graphs predict health outcomes?
Weight graphs help identify health risk categories, but they're screening tools, not predictive of individual outcomes. Two people at the same weight may have different health profiles based on fitness, diet, genetics, and existing conditions. Always discuss your weight health with your GP rather than relying on graphs alone.
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.