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 Loss Chart Printable — UK Medication and Health Guide
A weight loss chart printable is a useful tool for tracking your progress, but knowing which weight management options are available in the UK is equally important. This guide covers prescription weight loss medication approved by the MHRA, NHS access routes, private options, and eligibility criteria. Whether you're interested in GLP-1 weight loss injections, tracking your BMI, or understanding how these medications work alongside lifestyle changes, we'll help you find the right starting point. Use our free BMI calculator and GLP-1 weight loss calculator alongside this guide to take control of your health journey.
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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.
UK-Licensed Prescription Weight Loss Options
Three medications are currently licensed in the UK for weight management in eligible adults. Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist administered once weekly, starting at 2.5 mg and scaling up to 15 mg. Wegovy (semaglutide) is a GLP-1 agonist also given once weekly, with doses ranging from 0.25 mg to 2.4 mg. Saxenda (liraglutide) is a daily injection option with doses up to 3 mg.
- Mounjaro: clinical trials showed average weight loss of 15–21% body weight
- Wegovy: average weight loss approximately 15% body weight in clinical trials
- All require a prescription from a UK-licensed prescriber following clinical assessment
- Weight loss varies significantly between individuals
- Most effective when combined with a reduced-calorie diet and increased physical activity
Access to prescription weight loss medication in the UK differs between NHS and private routes, and eligibility depends on your BMI and health circumstances. Track your progress using our free progress tracker once you begin any weight management plan.
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 vs Private Access and Eligibility
NHS weight loss medication is accessed through tier 3 specialist weight management services following GP referral. However, availability varies significantly by region, and waiting lists can extend several months. Private access is available through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber—no NHS referral required.
- NHS eligibility: BMI ≥30, or BMI 27–29.9 with weight-related health conditions (lower thresholds for certain ethnicities)
- Private eligibility: assessed individually by prescriber at consultation
- Speak to your GP first to understand your options and local NHS provision
- Both routes require prescription and ongoing clinical assessment
Understanding your weight management options starts with knowing your current BMI—use our free weight converter and BMI calculator to establish your baseline health metrics before discussing options with your GP.
- 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 weight loss chart and why is it useful?
A weight loss chart tracks your weight over time, helping you visualize progress and stay motivated. Monthly or weekly entries show trends more clearly than daily fluctuations. Combining a printable chart with our free progress tracker gives you both a physical record and digital tracking. Charts help you identify patterns and celebrate milestones—whether you're using diet, exercise, medication, or a combination approach.
Who can get prescription weight loss medication in the UK?
Adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions (high blood pressure, type 2 diabetes, cardiovascular disease), may be eligible. Lower BMI thresholds apply for people of South Asian, Chinese, Black African, or Black Caribbean heritage. All prescriptions require clinical assessment by a GP or licensed prescriber. Individual circumstances vary—speak to your GP about whether you qualify.
What is GLP-1 weight loss medication and how does it work?
GLP-1 (glucagon-like peptide-1) receptor agonists mimic a natural hormone that regulates appetite and blood sugar. Medications like Wegovy and Mounjaro (a dual GLP-1/GIP agonist) help you feel fuller with smaller portions, reduce cravings, and support sustainable weight loss. They're prescribed as once-weekly injections. Results vary—clinical trials show average weight loss of 15–21%—but individual outcomes depend on adherence and lifestyle changes.
How do I know if I'm eligible for NHS weight loss medication?
Your GP can assess your eligibility based on your BMI, health conditions, and medical history. Request a referral to your local tier 3 specialist weight management service. Calculate your BMI using our free BMI calculator to give you a starting point for the conversation. NHS provision varies by region, so availability and waiting times depend on where you live. Private options are also available if NHS access is limited.
Should I use a printable chart instead of tracking on an app or calculator?
Both methods work—choose what suits you best. Printable charts are tactile, don't require batteries, and provide a satisfying visual record. Digital tools like our free progress tracker offer convenience and can calculate trends automatically. Many people use both: a printable chart on their wall for motivation and a digital tracker for detailed analysis. The best method is the one you'll stick with consistently.
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.