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
Understanding Pounds and Stone in UK Health
Pounds and stone are the traditional UK measurements for body weight, though kilograms are increasingly used in NHS guidance. Understanding how these units relate to each other—and to your health—is essential for tracking weight and accessing accurate health information. This guide explains the conversion between pounds and stone, their place in UK health advice, and how to use these measurements alongside modern BMI calculations for better health context.
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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.
The Conversion Between Pounds and Stone
One stone equals exactly 14 pounds. This is the fundamental conversion used throughout the UK for body weight.
- 1 stone = 14 pounds (lbs)
- 1 pound = 0.0714 stone
- To convert pounds to stone: divide by 14
- To convert stone to pounds: multiply by 14
For example, 10 stone = 140 pounds, and 200 pounds = 14 stone 4 pounds. Most UK adults express their weight using stone and pounds together—such as "11 stone 7 pounds"—rather than using kilograms alone. However, NHS health guidance increasingly uses kilograms for clinical accuracy. Use our free weight converter above to switch instantly between pounds, stone, and kilograms across all your measurements.
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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 and Why It Still Matters
Stone and pounds remain deeply embedded in UK culture and everyday language, even though the NHS has adopted kilograms for most clinical purposes. This cultural preference means most UK adults relate better to their weight when expressed in stone and pounds. Modern health guidance—including NHS healthy weight ranges and BMI categories—is typically published in kilograms but can be easily converted. For accurate health context, calculate your BMI using our free BMI calculator on this page, which accepts both pounds and stone measurements and provides NHS-aligned health guidance for UK adults.
- 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.
What is the exact conversion between stone and pounds?
One stone equals exactly 14 pounds. To convert any weight in pounds to stone, divide by 14. For example, 154 pounds = 11 stone. Conversely, multiply stone by 14 to get pounds. Most UK adults express weight as a combination—such as "12 stone 3 pounds"—rather than using one unit alone.
How do pounds and stone relate to kilograms?
One pound equals 0.454 kilograms, and one stone equals 6.35 kilograms. The NHS predominantly uses kilograms for clinical measurements, but understanding all three units helps when reading health guidance from different sources. Our weight converter lets you switch between all three instantly.
What is a healthy weight in pounds and stone?
According to NHS guidance, a healthy BMI is between 18.5 and 24.9. For example, an adult who is 5ft 8in tall should weigh between approximately 122–164 pounds (8st 10lbs–11st 10lbs). Your specific healthy weight range depends on your height and individual health. Use our free BMI calculator to find your personal healthy weight range.
Are pounds and stone still used in modern NHS health guidance?
The NHS now primarily uses kilograms for clinical measurements and health recommendations. However, healthcare professionals understand both systems, and many UK adults find it easier to relate to their weight in stone and pounds. Your GP can work with you in whichever measurement system you prefer.
Why do some health websites use pounds and others use stone?
UK health websites vary in their approach. Some use pounds (common in fitness and online tools), some use stone (cultural preference), and some use kilograms (NHS standard). This variation can be confusing. Our free weight converter on this page helps you translate between all three units so you can understand any health information, regardless of which measurement system is used.
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.