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 Lbs Weight in the UK
Lbs (pounds) is a weight measurement commonly used in the UK, though kilograms and stone are more standard for health contexts. Understanding your weight in pounds, alongside kg and stone conversions, helps you track your health properly according to NHS guidance. Whether you're monitoring your weight for fitness, health management, or simply curious about how your weight compares to healthy weight ranges, using the right measurements matters. Our free weight converter makes it easy to switch between lbs, kg, and stone instantly, and you can use our BMI calculator to see where your weight sits within NHS healthy weight guidelines for 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 Lbs Fits Into UK Weight Measurement
In the UK, weight is measured in three main ways: kilograms (kg), stone and pounds, and pounds alone (lbs). The NHS uses kilograms for clinical measurements and health guidance, but many UK adults still think in terms of stone and pounds in everyday life. One pound (lb) equals 0.453592 kg, and one stone equals 14 pounds exactly. This means converting between these systems is straightforward once you understand the ratios.
- NHS health guidance and BMI calculations typically use kilograms as the standard
- UK clothing sizes and many diet programmes reference stone and pounds
- Fitness apps and some online health tools may display weight in pounds
- Understanding all three measurements helps you engage fully with UK health information
Use our free weight converter above to switch between lbs, kg, and stone instantly, ensuring you're always working with the measurement that makes sense for your situation.
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.
Your Weight and NHS Health Guidance
Once you know your weight in lbs or any other measurement, the next step is understanding what that weight means for your health according to NHS guidance. Your healthy weight range depends on your height and is calculated using Body Mass Index (BMI). The NHS recommends a healthy BMI of 18.5 to 24.9 for most UK adults, though lower thresholds apply if you're of South Asian, Chinese, Black African, or Black Caribbean heritage.
Even modest weight loss—around 5 to 10% of your current weight—can bring significant health benefits including lower blood pressure, improved blood sugar control, and reduced joint stress. If you're concerned about your weight management or want personalised guidance on healthy weight for your height, your GP can provide advice tailored to your individual health.
- 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 difference between lbs and stone?
One stone equals exactly 14 pounds. In the UK, weight is often expressed as stone and pounds together (e.g., 11 stone 7 pounds). Lbs is simply pounds alone. Kilograms are the NHS clinical standard. All three systems measure the same thing but use different scales.
How do I convert my weight from lbs to kg?
To convert pounds to kilograms, multiply by 0.453592. For example, 154 lbs equals approximately 70 kg. Use our free weight converter above to do this instantly without needing to do the maths yourself.
What is a healthy weight in lbs for a UK adult?
A healthy weight depends on your height and is calculated using BMI. According to NHS guidance, a healthy BMI is 18.5 to 24.9. For example, a person 5ft 8in tall has a healthy weight range of approximately 123 to 165 lbs. Our free BMI calculator shows your personal healthy range instantly.
Why do UK health services use kg instead of lbs?
The NHS uses kilograms because they're the international clinical standard, making comparisons across health systems easier and reducing medication dosing errors. However, the UK public often uses stone and pounds in everyday life, so understanding conversions is helpful.
Should I track my weight in lbs or kg?
Use whichever measurement you find clearest. NHS guidance uses kg, so if you're discussing weight with your GP, kg is standard. For personal tracking, choose what makes sense to you. Our progress tracker lets you log weight in any measurement and see conversions instantly.
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.