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 Losing 1 Stone Really Mean Visually?
Losing 1 stone (6.35 kg or 14 lbs) might not sound dramatic in numbers, but visually it represents a significant change to your body composition and health. Whether you're managing weight through lifestyle changes, NHS weight loss programmes, or prescription weight loss medication, understanding what 1 stone actually looks like can help motivate your journey. This guide shows you the practical meaning behind this common UK weight loss milestone and how it affects your overall health profile.
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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 Much Is 1 Stone in Different Measurements?
1 stone equals:
- 6.35 kilograms (kg)
- 14 pounds (lbs)
- 90,722 grams
In UK health contexts, 1 stone is the standard unit most people use when discussing weight changes. For example, if you weigh 13 stone (82 kg) and lose 1 stone, you'd weigh 12 stone (75.65 kg). Using our free weight converter, you can instantly switch between stone, kilograms, and pounds to track your progress in whichever unit feels most meaningful to you. For many people managing weight through GLP-1 weight loss injections like Mounjaro or Wegovy, losing 1 stone often represents the initial target milestone after 8–12 weeks of treatment, though individual results vary significantly based on starting weight and dose.
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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.
The Health Impact of Losing 1 Stone
Losing just 1 stone can produce measurable health improvements, even though it may seem modest. Research shows that a 5% reduction in body weight — which for most adults is less than 1 stone — can reduce blood pressure, improve blood sugar control, lower LDL cholesterol, and reduce joint stress. For someone weighing 14 stone (89 kg), 1 stone loss represents a 7.1% reduction, placing it well above the threshold for meaningful health benefits. NHS weight management guidance emphasises that sustainable weight loss of 0.5–1 kg per week is ideal, making 1 stone a realistic 6–14 week goal. Many people using prescription weight loss medication or following NHS weight loss programmes use MyWeightCheck's free progress tracker to log and visualise their 1 stone milestones, helping maintain motivation throughout their weight loss journey.
- 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 1 stone a good amount of weight to lose?
Yes, losing 1 stone (6.35 kg) is considered excellent progress. The NHS recommends losing 0.5–1 kg per week for sustainable results, making 1 stone achievable in 6–14 weeks. Even this modest loss can improve blood pressure, blood sugar control, and reduce joint pain. For those using prescription weight loss medication or following NHS programmes, 1 stone often represents an important psychological milestone that motivates continued healthy habits.
How does 1 stone compare to weight loss in kg?
1 stone equals exactly 6.35 kg. For many UK adults, stone feels more intuitive — saying "I've lost 1 stone" feels more meaningful than "I've lost 6.35 kilograms." You can easily track both using our weight converter tool. If your GP or prescriber discusses weight loss in kilograms, simply divide by 6.35 to get the stone equivalent, or use the converter to track your progress in your preferred unit.
What's the visual difference when you lose 1 stone?
The visual impact of 1 stone depends on your starting weight and how the weight is distributed. For most people, 1 stone loss is noticeable in the face, waist, and overall body shape — clothes often fit noticeably looser. Our free BMI calculator helps show how 1 stone affects your BMI category. For example, someone at 85 kg with a BMI of 30 might drop to 78.65 kg with a BMI of 27.5, moving from the obese to overweight category according to NHS guidelines.
How long does it typically take to lose 1 stone?
Following NHS guidance, you should lose 0.5–1 kg per week through diet and activity changes. This means 1 stone takes 6–14 weeks through conventional weight management. With prescription weight loss medication like Mounjaro or Wegovy, some people lose 1 stone more rapidly in early weeks, though results vary significantly between individuals and depend on starting weight, dose, and adherence to lifestyle changes alongside medication.
Can I lose 1 stone safely with weight loss injections?
Yes. Prescription weight loss medications like Mounjaro (tirzepatide) and Wegovy (semaglutide) are designed to support gradual, sustainable weight loss. Clinical trials show these GLP-1 medications help participants lose significant amounts over 52+ weeks when combined with lifestyle changes. Your prescriber will assess your individual suitability and monitor your progress. Try our free GLP-1 weight loss calculator to explore how medications might support your specific weight loss goals.
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.