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 Is a Stone Score and How Does It Relate to UK Health?
A "stone score" is an informal term sometimes used in the UK to describe body weight measured in stone—the traditional British unit of weight. Unlike BMI or body fat percentage, a stone score simply represents raw weight without considering height or health context. Understanding your weight in stone, alongside your height and BMI, gives you a clearer picture of your overall health status according to NHS guidance. MyWeightCheck helps you convert, calculate, and interpret your weight in the measurements that matter most to UK adults.
10,000+ calculations today · NHS-aligned thresholds · 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/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 Stone Score Fits Into UK Health Assessment
Weight in stone is deeply embedded in UK culture—most British adults naturally think about their body weight in stone and pounds rather than kilograms. However, stone alone is not a complete health measure. The NHS uses BMI (body mass index) as the primary screening tool for assessing whether weight is healthy, as it accounts for both weight and height. A stone score gives you one piece of the puzzle, but to understand if your weight is healthy, you need context: your height, your BMI, and any weight-related health conditions you may have.
For example, two adults weighing the same in stone may have very different health profiles if they differ in height. This is why the NHS recommends using BMI alongside other measures like waist circumference to assess health risk. Use our free BMI calculator above to see where your weight sits in the healthy range for your height, then use our weight converter to switch between stone, kilograms, and pounds as needed.
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.
Using Stone Score With NHS Health Guidance
The NHS does not use "stone score" as an official health metric—instead, they focus on BMI categories and weight-related health conditions. However, understanding your weight in stone is useful for personal tracking and communicating with your GP. If you're managing your weight or considering weight loss, your GP can help you set realistic goals measured in stone or kilograms, whichever feels most natural to you.
For sustainable weight loss, the NHS recommends aiming for a loss of 0.5 to 1 kg per week, which equals roughly 1 to 2 lbs per week or about 2 to 4 lbs monthly. Tracking your weight regularly using our free progress tracker helps you monitor changes and stay motivated. Whether you're using stone, kilograms, or pounds, consistent measurement and honest assessment of your lifestyle are what drive real, lasting results.
- 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 stone score the same as BMI?
No. Stone score is just raw weight in the British unit of stone. BMI combines weight and height to assess whether weight is healthy for your specific stature. The NHS uses BMI, not stone score alone, to evaluate health risk. Use our BMI calculator to find your BMI based on your weight in stone and your height.
What's the difference between stone and kilograms?
Stone and kilograms are just different units of measurement. 1 stone equals 6.35 kg. The NHS uses kilograms for medical records, but most UK adults think in stone for everyday purposes. Our weight converter makes it easy to switch between both instantly.
How does stone score relate to healthy weight in the UK?
A healthy weight in stone depends entirely on your height. The NHS defines healthy BMI as 18.5–24.9, which translates to different stone weights for different heights. For example, at 5ft 8in, healthy weight is roughly 8st 10lbs to 11st 10lbs. Use our BMI calculator to find your personal healthy range.
Can I use stone score to track weight loss?
Yes. Tracking weight in stone is a practical way to monitor progress. The NHS recommends losing 0.5–1 kg (1–2 lbs) per week for sustainable results. Our progress tracker lets you log your weight in stone and see trends over time, helping you stay accountable and motivated.
Should I talk to my GP about stone score or BMI?
Talk to your GP about both. Your GP can help you understand your personal healthy weight range in either stone or kilograms, assess your overall health risk, and create a realistic weight management plan if needed. Your GP can also check for weight-related health conditions like high blood pressure or type 2 diabetes.
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.