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
1 Stone Weight Loss: Before and After
Losing 1 stone (approximately 6.35 kg or 14 pounds) is a meaningful health milestone. Whether you're aiming to reach a healthier weight management target or exploring prescription weight loss medication like Wegovy, understanding what losing 1 stone realistically involves helps set sustainable goals. This guide explains the physical changes, health benefits, and practical approaches to achieving 1 stone weight loss in the UK.
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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.
Health Benefits of Losing 1 Stone
Losing just 1 stone can produce significant health improvements, even if it's part of a larger weight loss journey. The NHS emphasises that a 5–10% reduction in body weight improves health markers substantially. For many adults, 1 stone represents approximately 5–10% of their total weight, which triggers measurable changes.
- Blood pressure reduction: Losing weight reduces the pressure on blood vessels, often lowering hypertension readings within weeks
- Blood sugar control: Even modest weight loss improves insulin sensitivity and reduces type 2 diabetes risk
- Cholesterol improvement: LDL ("bad") cholesterol typically decreases with sustained weight loss
- Joint relief: Reduced knee, hip, and back pain as joints support less weight
- Sleep quality: Weight loss reduces sleep apnoea severity and improves sleep duration
- Energy levels: Many people report increased energy and improved mood after losing 1 stone
These benefits can appear within 8–12 weeks of starting weight management, even before all weight is lost.
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.
Timeline and Methods for 1 Stone Weight Loss
The NHS recommends losing weight at a rate of 0.5–1 kg (1–2 lbs) per week for sustainable results. This means losing 1 stone typically takes 8–14 weeks. The most effective weight management approach combines dietary changes, increased physical activity, and—for eligible adults—prescription weight loss medication such as Wegovy or Mounjaro alongside lifestyle modification.
You can calculate your personal weight loss timeline using our GLP-1 weight loss calculator, which projects realistic outcomes at different doses. Combining prescription weight loss injections with a reduced-calorie diet and consistent movement produces faster results than lifestyle alone. Track your progress using our free progress tracker to stay motivated and monitor improvements beyond just weight, including energy, mood, and fitness markers.
- 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 take to lose 1 stone?
Following NHS guidance, losing 1 stone (6.35 kg) at 0.5–1 kg per week takes 8–14 weeks. Speed depends on starting weight, diet consistency, activity level, and whether you use prescription weight loss medication. Your GP can advise on a realistic timeline for your specific situation.
What does 1 stone weight loss look like visually?
Visible changes after 1 stone loss include looser clothes (often 1–2 dress sizes), reduced facial bloating, and more defined jawline and collarbone. However, changes are individual—muscle gain from exercise can offset some scale weight loss while still improving appearance and health markers.
Can Wegovy help me lose 1 stone?
Yes. Wegovy (semaglutide) is a prescription-only GLP-1 injection approved in the UK for weight management. Clinical trials showed Wegovy helps users lose an average of 14–15% of body weight when combined with a reduced-calorie diet and increased activity. 1 stone loss is well within realistic outcomes for many users.
Is 1 stone weight loss enough to improve my BMI?
It depends on your starting weight and height. Use our free BMI calculator to check your current BMI, then calculate where you'll fall after losing 1 stone. Often, 1 stone loss moves adults from the "obese" to "overweight" category or into a healthier weight range, significantly improving health risk profile.
What's the difference between losing 1 stone on Wegovy versus diet alone?
Wegovy may produce faster, more consistent weight loss by reducing appetite and supporting portion control alongside your diet changes. Clinical trials showed approximately clinically studied weight loss with Wegovy plus lifestyle change versus ~3% with lifestyle change alone. However, Wegovy is prescription-only and requires clinical assessment first.
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.