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?
A stone contains exactly 14 pounds — this is the standard UK measurement used by NHS health services and most British adults. If you're trying to understand your weight in different units, or checking your healthy weight using NHS guidance, it helps to know how stone, pounds, and kilograms relate to each other. Our free weight converter above instantly converts between all these measurements, and you can also use our BMI calculator to see where your weight sits on the NHS healthy weight scale.
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.
Stone To Pounds — The Conversion
1 stone = 14 pounds exactly. This is a fixed conversion used across the UK for body weight measurements. To convert stone to pounds, simply multiply the number of stone by 14. For example, 10 stone equals 140 pounds (10 × 14 = 140).
The reverse is also simple: to convert pounds to stone, divide the number of pounds by 14. So 140 pounds equals 10 stone (140 ÷ 14 = 10).
Stone and pounds are still commonly used in the UK for measuring body weight, even though the NHS also records weights in kilograms for clinical purposes. Many UK weight management programmes, fitness guides, and health discussions use stone and pounds because that's what British adults are familiar with.
- 1 stone = 14 pounds (exact)
- 2 stone = 28 pounds
- 10 stone = 140 pounds
- 15 stone = 210 pounds
Use our free weight converter on this page to convert any weight instantly between stone, pounds, and kilograms.
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.
Stone And Pounds In UK Health Context
When you visit your GP or use NHS health tools, you'll often see weight described in both stone and kilograms. The NHS healthy weight range for most adults is a BMI of 18.5 to 24.9, which translates to different stone and pound ranges depending on your height.
For example, a healthy weight for an adult who is 5ft 8in tall falls roughly between 8st 10lbs and 11st 10lbs. People of South Asian, Chinese, Black African, or Black Caribbean heritage may have different healthy weight ranges according to NHS guidance, as these groups face higher health risks at lower BMI levels.
Understanding your weight in stone, pounds, and kilograms helps you communicate clearly with your GP about your health goals and compare your weight against NHS guidelines. Try our free BMI calculator to check your personal BMI instantly and see where your current weight sits on the healthy weight scale.
- 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.
Why do the UK and other countries use different measurements for weight?
The UK traditionally uses stone and pounds for body weight, while most of Europe and the NHS clinical system use kilograms. This is partly historical — imperial measurements have been used in Britain for centuries. Today, UK adults still prefer stone and pounds for personal weight discussions, even though medical records are kept in kg.
Is stone still used in modern UK health services?
Yes, stone remains widely used. Many UK GPs, weight management programmes, and fitness guides quote weights in stone and pounds because that's what British adults understand best. However, the NHS also records weights in kilograms for clinical consistency and international comparison.
How do I convert my weight from pounds to kilograms?
1 pound = 0.454 kilograms, so multiply your weight in pounds by 0.454. For example, 140 pounds equals approximately 63.5 kg. Alternatively, use our free weight converter on this page to convert instantly between any units.
What's the healthy weight range in stone and pounds?
The healthy BMI range is 18.5 to 24.9. For a 5ft 8in adult, this equals roughly 8st 10lbs to 11st 10lbs. Your personal healthy range depends on your height. Calculate yours using our free BMI calculator above, which shows your healthy weight range in stone, pounds, and kilograms.
Can I use stone and pounds when discussing weight loss with my GP?
Absolutely. Your GP understands both stone/pounds and kilograms. Many UK weight loss programmes, including those using weight loss injections like Mounjaro or Wegovy, discuss progress in stone and pounds because that's more meaningful to patients. Use whichever measurement you're most comfortable with.
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.