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
Free Printable Weight Loss Chart — Track Your Progress
A printable weight loss chart is a simple, practical tool to track your progress as you work towards your health goals. Whether you're managing weight through lifestyle changes alone or considering prescription weight loss medication available in the UK, keeping a record of your weight helps you stay motivated and identify patterns. This guide explains how to use a weight loss chart effectively and introduces the prescription medication options now available to eligible adults in the UK — including Mounjaro and Wegovy — which may support your weight management journey.
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.
UK Prescription Weight Loss Options — What's Available
If you're managing weight management in the UK, several prescription medications are now available through NHS specialist services or private prescribing. The main options are Mounjaro (tirzepatide), a dual GIP and GLP-1 receptor agonist, and Wegovy (semaglutide), a GLP-1 agonist. Both are prescription-only medicines given as once-weekly injections. In clinical trials, Mounjaro helped participants lose an average of 15–21% of their body weight, whilst Wegovy showed similar results. Eligibility typically requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes or high blood pressure. Individual results vary significantly. Use our free GLP-1 weight loss calculator above to estimate potential outcomes at different doses, and check your personal BMI with our BMI calculator to understand where you currently stand.
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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.
NHS vs Private Access — How to Find Out if You're Eligible
NHS access: You can discuss prescription weight loss medication with your GP, who may refer you to a tier 3 specialist weight management service. Waiting times and availability vary significantly by region. Private access: GPhC-registered online prescribing services can assess you for Mounjaro or Wegovy without an NHS referral, though costs apply. Before starting any medication, a qualified prescriber will conduct a clinical assessment to confirm suitability. Whatever route you choose, a printable weight loss chart remains a valuable tool for tracking your weight loss journey alongside any medication. Log your weekly weigh-ins, note any changes in how you feel, and review progress monthly. Our free progress tracker can also help you record and visualise your results 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.
Can I get a free printable weight loss chart template?
Yes. Many NHS resources and health websites offer free, printable weight loss tracking sheets. You can create a simple chart with columns for date, weight (in stone and lbs or kg), and notes. Alternatively, use a spreadsheet or our free MyWeightCheck progress tracker above to log your weight digitally and track trends automatically.
What prescription weight loss options are available in the UK?
Mounjaro and Wegovy are the main prescription options for eligible adults. Both are GLP-1-based injections given once weekly. Eligibility typically requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions. Prescription is only available following a clinical assessment with a GP or licensed prescriber.
How often should I weigh myself when using a weight loss chart?
The NHS recommends weighing yourself once a week at the same time of day, typically in the morning. Weight naturally fluctuates daily due to water retention and digestion, so weekly checks provide a more reliable picture of your actual progress over time.
Do I need prescription medication to use a weight loss chart?
No. A weight loss chart is useful whether you're managing weight through diet and exercise, NHS weight loss programmes, or prescription medication. It's a practical tool for staying accountable and motivated, regardless of your chosen approach.
How do I know if I'm eligible for prescription weight loss medication on the NHS?
Your GP can assess your eligibility based on your BMI, health history, and any weight-related conditions. You can also discuss private prescribing options. Use our BMI calculator above to check your current BMI and then speak with your GP about next steps tailored to your individual health needs.
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.