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 One Stone Weight Loss Mean for Your Health?
One stone equals approximately 6.4 kilograms or 14 pounds. Losing one stone is a meaningful and achievable weight loss goal that can bring real health benefits, even without losing significantly more weight. The NHS confirms that even modest weight loss of 5β10% of your body weight can improve blood pressure, blood sugar control, and cholesterol levels. Whether you're considering lifestyle changes, prescription weight loss medication, or a combination of both, understanding what one stone of weight loss represents helps you set realistic expectations for your health journey.
10,000+ calculations today Β· NHS-aligned thresholds Β· 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/mΒ²).
While BMI isn't a perfect measure β it doesn't account for muscle mass, bone density, or fat distribution β 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 β 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 One Stone?
The NHS recommends losing weight at a sustainable rate of 0.5 to 1 kg per week, which means losing one stone (6.4 kg) typically takes between 6 to 12 weeks with consistent effort. This timeline depends on several factors: your starting weight, how much you reduce your calorie intake, your activity level, and your metabolism.
- Calorie deficit approach: A deficit of around 500 kcal per day produces approximately 0.5 kg weight loss per week. To lose one stone in 8 weeks, you'd need to maintain a consistent calorie reduction.
- With prescription medication: GLP-1 weight loss injections like Wegovy (semaglutide) may accelerate weight loss when combined with dietary changes and increased physical activity. Clinical trials showed average weight loss of around 15% body weight, though individual results vary significantly.
- Realistic expectations: Weight loss is rarely linear β some weeks you'll lose more, other weeks less. This is completely normal and doesn't indicate failure.
Track your progress using our free progress tracker to monitor your journey week by week and stay motivated.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care β 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 β 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 β completely free.
Health Benefits You May Experience from Losing One Stone
Even losing one stone can produce measurable improvements in your health markers. Blood pressure often drops within weeks of sustained weight loss, reducing strain on your heart. Blood sugar control improves, lowering your risk of type 2 diabetes or helping manage existing diabetes. Cholesterol levels typically improve, particularly LDL cholesterol. You may also notice better sleep quality, reduced joint pain, improved mobility, and increased energy levels.
Calculate your current BMI using our free BMI calculator to see where you stand now, then set a realistic target after losing one stone. Many people find that visible improvements in how they feel often happen before they see significant changes on the scale β mood improvement, better sleep, and more energy are common early wins.
- 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 β 5mg β 7.5mg β 10mg β 12.5mg β 15mg
- GLP-1 receptor agonist
- Up to 15β17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg β 0.5mg β 1mg β 1.7mg β 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 | 15β22.5% | 12β17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20β32 weeks | 16β20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | Β£150βΒ£250/month | Β£150βΒ£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 β 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 much is one stone in kilograms?
One stone equals exactly 6.35029 kilograms, often rounded to 6.4 kg for practical purposes. Use our free weight converter to instantly convert between stone, kilograms, and pounds for any weight.
Is losing one stone a good weight loss goal?
Yes. The NHS states that even 5βclinically studied weight loss produces meaningful health benefits. For most UK adults, one stone is a realistic, achievable goal that delivers measurable improvements in blood pressure, blood sugar, and cholesterol without requiring extreme measures.
Can I lose one stone using prescription weight loss medication?
Prescription weight loss medications like Wegovy (semaglutide) are prescription-only and require clinical assessment. When combined with a reduced-calorie diet and increased physical activity, they may help you achieve weight loss goals. Individual results vary significantly. Your GP or a licensed prescriber can assess whether medication is suitable for you.
What's the difference between losing one stone through diet alone versus with medication?
Diet and exercise can achieve one stone weight loss, typically over 8β12 weeks at a sustainable 0.5β1 kg per week. GLP-1 medications may help some people lose weight faster by reducing appetite, but they work best alongside lifestyle changes, not as a replacement for them. Results vary between individuals.
How do I know if one stone weight loss will be enough for me?
Use our free BMI calculator to check your current BMI and see what your BMI would be after losing one stone. This shows whether one stone gets you into a healthier BMI range for your height. Your GP can provide personalised guidance about what weight loss targets would be most beneficial for your individual health.
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.