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 Does Two Stone Weight Loss Look Like?
Losing two stone (28 pounds or approximately 12.7 kg) is a realistic and achievable weight loss goal for many UK adults. Whether you're considering lifestyle changes, NHS weight loss programmes, or prescription weight management options like GLP-1 medication, understanding what this amount of weight loss means for your health is important. This guide explains the timeline, health benefits, and realistic expectations for two stone of weight loss.
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.
How Much is Two Stone in Other Units?
Two stone equals:
- 28 pounds (lbs)
- 12.7 kilograms (kg)
- Approximately 12–15% of body weight for an average UK adult (depending on starting weight)
Use our free weight converter above to see how this translates for your personal weight. For context, losing two stone from a starting weight of 100 kg (15 stone 10 lbs) would bring you to 87.3 kg (13 stone 10 lbs), typically moving you into a lower BMI category. The BMI calculator on this page can show you how this weight change affects your personal BMI and health classification.
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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.
Timeline and Health Benefits of Losing Two Stone
Losing two stone at a sustainable rate of 0.5–1 kg per week (NHS recommendation) typically takes 12–25 weeks (3–6 months). This pace supports long-term success and reduces muscle loss.
Health benefits at two stone weight loss include:
- Improved blood pressure and heart health
- Better blood sugar control and reduced diabetes risk
- Reduced joint stress and improved mobility
- Lower cholesterol levels
- Improved sleep quality
- Increased energy and improved mood
Even modest weight loss can have meaningful health gains — evidence suggests that losing just 5–10% of body weight delivers significant benefits.
- 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's the fastest safe way to lose two stone?
The NHS recommends losing 0.5–1 kg per week, which means two stone takes 12–25 weeks. Faster weight loss is possible with medical supervision (such as very low calorie diets) but increases risks. Prescription weight loss medication like GLP-1 injections may help accelerate weight loss when used alongside diet and exercise, though individual results vary significantly.
Can you lose two stone with diet and exercise alone?
Yes — many UK adults successfully lose two stone through calorie deficit (eating 500 kcal less per day), increased physical activity, and behaviour change. The NHS Weight Loss Plan and local weight management services offer free support. Our free progress tracker can help you log your weight loss journey week by week.
Is two stone weight loss noticeable?
Yes. Two stone is visually noticeable on most people — typically you'll see changes in how clothes fit, face shape, and overall appearance within 3–4 months. Beyond appearance, you'll likely notice improved energy, better sleep, and easier movement. These changes often boost motivation to continue.
What if I use GLP-1 medication like Wegovy or Mounjaro?
Clinical trials show GLP-1 medications (such as semaglutide in Wegovy) may help achieve weight loss of 15–21% of body weight on average — which for many people exceeds two stone. However, prescription weight loss medication requires a clinical assessment and is not suitable for everyone. Our GLP-1 weight loss calculator can help estimate potential outcomes at different doses.
How do I know my weight is healthy after losing two stone?
Use the free BMI calculator on this page — a healthy BMI for UK adults is 18.5–24.9 (or 18.5–22.9 for adults of South Asian, Chinese, Black African, or Black Caribbean heritage). Your GP can also assess your personal health using blood pressure, cholesterol, and other clinical measures beyond weight 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.