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 a 2 Stone Weight Loss Look Like?
Losing 2 stone (12.7kg or 28 lbs) is a significant health milestone that many people aim for in their weight management journey. In UK measurements, 2 stone equals 28 pounds or approximately 12.7 kilograms. A loss of this magnitude can meaningfully improve blood pressure, blood sugar control, and overall fitness. Whether through dietary changes, increased physical activity, or prescription weight loss medication, understanding what 2 stone weight loss represents helps set realistic expectations. Even modest weight loss—around 5% to 10% of body weight—can deliver measurable health benefits according to NHS guidance.
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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 Long Does It Take to Lose 2 Stone?
The timeframe for losing 2 stone depends on your starting point, lifestyle, and whether you use prescription weight loss support. The NHS recommends losing weight at a rate of 0.5 to 1 kg per week for sustainable results—this is roughly 0.5 to 1.5 lbs weekly.
At this pace, 2 stone (12.7kg) would take approximately 3 to 6 months to lose safely. Some people lose weight faster initially, particularly in the first 4 weeks when water weight is shed. Faster loss is possible with prescription weight loss medication like GLP-1 injections, where clinical trials have shown participants losing significantly more weight alongside reduced-calorie diet and increased physical activity. Individual results vary—your GP or a licensed prescriber can advise on what rate is realistic for you based on your current health, BMI, and any weight-related conditions.
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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.
Health Benefits of Losing 2 Stone
Losing 2 stone—even if it's part of a larger weight loss journey—can produce measurable health improvements:
- Blood pressure reduction: Weight loss typically lowers blood pressure, reducing strain on the heart
- Blood sugar improvement: Better glucose control and reduced diabetes risk
- Joint relief: Carrying less weight reduces stress on knees, hips, and ankles
- Sleep quality: Weight loss can reduce sleep apnoea severity
- Energy levels: Many people report improved fitness and reduced fatigue
Use our free BMI calculator to see how 2 stone loss would change your BMI category, and try our progress tracker to monitor your journey toward this goal.
- 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.
Is losing 2 stone in 3 months realistic?
Losing 2 stone (12.7kg) over 3 months equals approximately 4.2kg per month or 1kg per week—this is at the upper end of NHS-recommended safe weight loss. It's realistic with consistent calorie deficit and increased activity, though individual results vary. Prescription weight loss medication can support faster loss alongside lifestyle changes.
How much weight loss is 2 stone in kilograms?
2 stone equals exactly 12.7 kilograms (or 28 pounds). In UK measurements, 1 stone = 6.35kg. Use our free weight converter above to convert between stone, kilograms, and pounds instantly.
What's the BMI difference after losing 2 stone?
A 2 stone loss typically reduces BMI by approximately 1.5 to 2.5 points depending on your height. For example, at 5ft 8in, losing 2 stone drops BMI from around 31 to 29. Use our BMI calculator to see your personal before-and-after BMI range based on your height.
Can GLP-1 injections like Wegovy help lose 2 stone?
Yes, GLP-1 weight loss injections may help achieve 2 stone loss as part of a larger weight management plan. Wegovy (semaglutide) showed average weight loss of approximately 15% body weight in clinical trials. For a person weighing 13 stone (82kg), this could equate to nearly 2 stone. Results vary—a prescriber can advise whether this is suitable for you.
What's the best way to lose 2 stone and keep it off?
Sustainable 2 stone loss combines reduced-calorie diet (500 kcal daily deficit), increased physical activity, and behaviour change. NHS weight management programmes across all tiers support this. For some, prescription weight loss medication alongside lifestyle changes provides additional support. Your GP can refer you to tier 2 or 3 weight management services.
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.