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
How many pounds are in a stone?
There are exactly 14 pounds in one stone. This is the standard UK measurement used by most British adults for body weight, clothing sizes, and health discussions. Understanding stone to pounds conversion is essential for UK health guidance, as the NHS and most UK health services use both measurements interchangeably. Whether you're checking your weight, interpreting health advice, or using our free weight converter, knowing this simple conversion helps you navigate UK health information confidently.
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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.
Stone to pounds conversion explained
One stone always equals exactly 14 pounds — this is a fixed conversion used throughout the UK and has remained unchanged for centuries. To convert any weight in stone to pounds, simply multiply the stone figure by 14. For example: 10 stone equals 140 pounds (10 × 14). If you have stone and pounds combined — such as 10 stone 7 pounds — you add the pounds to the multiplied result: (10 × 14) + 7 = 147 pounds total.
The reverse conversion (pounds to stone) divides the pound amount by 14. For instance, 154 pounds divided by 14 equals 11 stone. Most UK adults use this conversion regularly when discussing weight with their GP, checking NHS health guidance, or tracking progress with our free weight converter. The stone measurement remains deeply embedded in British culture, even though kilogrammes are used in clinical settings.
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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.
Why UK adults use stone for weight
In the UK, stone remains the preferred unit for body weight despite NHS clinical records using kilogrammes. This cultural preference means UK health advice, weight management discussions, and personal scales often display stone and pounds together. Our free weight converter allows instant switching between stone, pounds, and kilogrammes — making it easy to understand health information in whichever measurement you prefer.
When your GP discusses your weight or BMI, they may reference it in kilogrammes, but you can convert instantly using the conversion ratio (1 stone = 6.35 kg). Understanding these conversions ensures you fully grasp NHS health guidance, whether discussing weight loss, healthy weight ranges, or assessing your BMI using the free BMI calculator on this page.
- 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 do I convert stone to pounds quickly?
Multiply the stone number by 14. For example, 12 stone = 168 pounds. If you have stone and pounds combined (like 12st 7lbs), multiply the stone figure by 14, then add the remaining pounds: (12 × 14) + 7 = 175 pounds total.
Is one stone always 14 pounds in the UK?
Yes, exactly. One stone = 14 pounds is a fixed conversion used universally in the UK. This conversion never changes and applies to all weight measurements in the UK health and fitness context.
What is 70 kg in stone and pounds?
70 kg converts to approximately 11 stone 0 pounds (11st). To calculate: divide 70 by 6.35029 (the kg-to-stone conversion factor). Use our free weight converter for instant conversions between kg, stone, and pounds.
Why do UK health services use both stone and pounds?
The NHS uses kilogrammes in clinical records, but UK adults historically prefer stone and pounds for personal weight discussions. This dual-unit system persists in UK culture, so understanding both measurements helps you engage with health advice confidently.
Can I use stone and pounds when talking to my GP?
Absolutely. UK GPs are familiar with both stone/pounds and kilogrammes. Your GP can work with whichever measurement you prefer, though clinical records are typically recorded in kg. Always feel free to ask your GP to explain your weight in stone if that's more meaningful to you.
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.