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
7 Stone Weight Loss: What You Need to Know
Losing 7 stone (approximately 44 kg or 98 lbs) is a significant health goal that can substantially improve your wellbeing. Whether you're considering this journey or already underway, understanding realistic timescales, methods, and health benefits is essential. This guide covers evidence-based weight loss approaches available through the NHS and private healthcare in the UK, from lifestyle changes to prescription weight management options.
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.
Methods for Achieving 7 Stone Weight Loss
Losing 7 stone requires a sustained approach combining dietary changes, increased physical activity, and behaviour modification. The NHS recommends losing weight at a rate of 0.5–1 kg (1–2 lbs) per week for sustainable results, which means 7 stone loss would take approximately 6–12 months of consistent effort.
- Calorie deficit: A deficit of around 500 kcal per day typically results in 0.5 kg weekly loss — achievable through diet, exercise, or both
- NHS weight loss support: Free programmes including the NHS 12-week weight loss plan and digital apps like NHS One You
- Prescription weight management: GLP-1 weight loss injections like Mounjaro or Wegovy may support faster loss — these are prescription-only and require clinical assessment
- Specialist services: NHS tier 3 weight management services offer structured support for significant weight loss
Use our free GLP-1 weight loss calculator to explore projected results if considering prescription weight management medication. Track your progress using our free progress tracker as you work towards your goal.
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.
Health Benefits and Realistic Expectations
Evidence shows that losing even 5–10% of body weight delivers measurable health benefits, so achieving 7 stone loss is highly impactful. You can expect improvements in blood pressure, blood sugar control, cholesterol levels, joint health, sleep quality, and energy levels.
Individual results vary significantly — some people lose weight faster initially, whilst others experience a plateau. Gender, age, metabolism, starting weight, and adherence all affect the timeline. Prescription weight loss injections may accelerate results when used alongside lifestyle changes, but they are not a shortcut — sustainable loss combines medication (if prescribed) with dietary changes and physical activity. Your GP can assess what approach suits your personal health situation.
Calculate your personal BMI and healthy weight range using our free BMI calculator to understand your starting point and target range.
- 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.
How long does it realistically take to lose 7 stone?
At the recommended NHS rate of 0.5–1 kg per week, losing 7 stone (44 kg) would take 9–18 months. Individual timescales vary based on starting weight, metabolism, diet consistency, and physical activity. Prescription weight loss medication may accelerate results when combined with lifestyle changes.
What's the difference between losing 7 stone through diet alone versus with prescription medication?
Dietary changes create a sustainable foundation, but prescription GLP-1 injections (Mounjaro or Wegovy) may support faster weight loss through appetite regulation. However, medication is prescription-only and requires clinical assessment — it's used alongside diet and exercise, not instead of them.
Is 7 stone weight loss safe?
Yes, losing weight at 0.5–1 kg weekly is considered safe by the NHS. Losing 7 stone may involve periods of faster loss initially, then slower loss later — this is normal. Medical supervision through your GP or specialist weight management services ensures safety, especially if you have existing health conditions.
How do I know if I'm eligible for prescription weight loss medication in the UK?
You may be eligible if your BMI is 30 or above, or 27–29.9 with weight-related health conditions (type 2 diabetes, high blood pressure, sleep apnoea, cardiovascular disease). Your GP can assess eligibility, or you can access private online prescribing following a clinical consultation.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are prescription-only injections licensed in the UK. Mounjaro (tirzepatide) uses dual GIP/GLP-1 mechanism; Wegovy (semaglutide) uses GLP-1 alone. Clinical trials showed both support significant weight loss. Your prescriber assesses which is appropriate based on your health history and individual 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.