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
Two Stone Weight Loss: A Realistic UK Health Guide
Losing two stone (28 pounds or 12.7 kg) is a significant but achievable weight loss goal for many UK adults. Whether you're aiming to improve your health, reduce disease risk, or reach a healthier weight management target, understanding realistic timescales and evidence-based methods is essential. This guide explains how long two stone weight loss typically takes, what approaches work best, and when to seek support from your GP or through NHS weight loss services.
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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 Two Stone Weight Loss Take?
The NHS recommends losing weight at a rate of 0.5 to 1 kg (1 to 2 lbs) per week for sustainable results. At this pace, two stone weight loss would typically take between 3 to 6 months.
Losing weight faster than this can lead to muscle loss, nutritional deficiencies, and difficulty maintaining the loss long-term. Your personal timescale depends on several factors: your starting weight, age, metabolism, activity level, and the method you choose.
- At 0.5 kg/week: approximately 6 months
- At 1 kg/week: approximately 3 months
- With prescription medication (e.g. GLP-1 weight loss injections): potentially faster, though individual results vary significantly
Even modest weight loss—just 5% of your body weight—can deliver meaningful health benefits including improved blood pressure, better blood sugar control, and reduced joint stress.
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.
Weight Loss Methods That Work: Evidence and Options
Dietary changes are the foundation of sustainable weight loss. A calorie deficit of around 500 kcal per day typically results in approximately 0.5 kg weekly loss. The NHS supports various evidence-based approaches including Mediterranean diet, intermittent fasting, and structured calorie reduction.
Prescription weight loss medication such as GLP-1 injections (Wegovy or Mounjaro) may help—clinical trials showed average weight loss of 15–21% of body weight alongside reduced-calorie diet and increased physical activity. These are prescription-only and require clinical assessment.
Physical activity supports both weight loss and long-term maintenance. The NHS recommends 150 minutes of moderate activity weekly. Your GP or NHS weight management service can provide personalised guidance for your situation.
Use our free BMI calculator above to see where you stand and what a healthy weight range is for your height. If you're considering prescription weight loss treatment, our GLP-1 weight loss calculator can help you understand potential outcomes at different doses. Track your progress over time using our free progress tracker—logging weekly weigh-ins helps maintain motivation and identify patterns.
Getting support makes weight loss more achievable. Your GP can refer you to NHS Tier 3 specialist weight management services, which offer behavioural support, dietary guidance, and access to prescription medication where appropriate. Private online prescribing services are also available for GLP-1 medications following a clinical assessment.
- 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 two stone in three months possible?
Losing two stone in three months (approximately 1 kg per week) is possible but at the upper limit of safe, sustainable loss. This pace requires significant calorie deficit and is best done under medical supervision. Faster loss increases muscle loss risk. Most people find 4–6 months more realistic and maintainable.
How much weight loss can GLP-1 injections like Wegovy achieve?
Clinical trials showed Wegovy helped participants lose an average of approximately 15% of body weight—which for many people would exceed two stone. Results vary considerably between individuals. Wegovy is prescription-only, requires clinical assessment, and works best combined with diet and activity changes.
What's the healthiest way to lose two stone?
The healthiest approach combines a modest calorie deficit (500 kcal daily for ~0.5 kg/week loss), increased physical activity (150+ minutes weekly), and dietary changes you can sustain long-term. Aim for 0.5–1 kg loss per week. Your GP can provide personalised advice or refer you to NHS weight management services.
Will I regain two stone after losing it?
Weight regain is common if you return to previous eating and activity habits. Sustainable loss requires lasting lifestyle changes. NHS weight management services include support for maintaining loss. Some people use prescription weight loss medication long-term to support maintenance.
Can I lose two stone without changing my diet?
Diet change is the primary driver of weight loss—exercise alone rarely produces significant weight loss without calorie reduction. The most effective approach combines dietary changes with increased physical activity. Your GP can discuss realistic options tailored to your circumstances.
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.