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 11 Stone 9 Pounds in Kilograms?
11 stone 9 pounds is equal to approximately 74.3 kilograms. This conversion uses the standard UK-to-metric formula: each stone equals 6.35 kilograms, and each pound equals 0.454 kilograms. Whether you're tracking your weight for health reasons, comparing UK and metric measurements, or simply curious about the conversion, understanding how stone and kilograms relate to each other is straightforward. Use our free weight converter above to switch between units instantly, and explore your personal BMI with our free BMI calculator to see where this weight falls on the NHS health 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.
NHS Health Context for 74.3 kg
At 74.3 kg, where you fall on the NHS health scale depends entirely on your height. For example, an adult who is 1.70 metres (5ft 7in) tall with a weight of 74.3 kg would have a BMI of approximately 25.7, which falls into the overweight category according to NHS guidelines. However, an adult who is 1.85 metres (6ft 1in) tall would have a BMI of around 21.7, which is within the healthy weight range. The NHS recommends a healthy BMI between 18.5 and 24.9 for most adults, though lower thresholds apply for people of South Asian, Chinese, Black African, or Black Caribbean heritage.
- Use the free BMI calculator on this page to find your personal BMI instantly
- NHS guidance emphasises that healthy weight is height-dependent, not absolute
- Even small changes in weight can shift your BMI category and health risk profile
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.
Weight Management and UK Health Resources
If you're at 11 stone 9 pounds and interested in weight management, the NHS recommends a sustainable approach combining modest calorie reduction with increased physical activity. The NHS Weight Loss Plan offers free guidance online, and your GP can provide personalised advice about your individual health. Track your weight loss journey using our free progress tracker, which lets you log changes over time and see trends in your progress. Safe weight loss is typically 0.5 to 1 kg per week, meaning gradual, lasting results rather than rapid change. Whatever your current weight, managing it through evidence-based methods supports better cardiovascular health, blood sugar control, and overall wellbeing.
- 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 11st 9lb in kilograms?
11 stone 9 pounds equals approximately 74.3 kg. To calculate this yourself: multiply 11 by 6.35 (kg per stone) and add 9 × 0.454 (kg per pound). This gives 69.85 + 4.09 = 73.94 kg, or 74.3 kg when rounded.
Is 74.3 kg a healthy weight?
Whether 74.3 kg is healthy depends on your height. Use the free BMI calculator on this page to enter your height and weight. The NHS healthy BMI range is 18.5 to 24.9 for most adults. Your GP can also advise on healthy weight for your individual circumstances.
How do I convert stone and pounds to kg quickly?
Use our free weight converter above to convert instantly. Alternatively: multiply stone by 6.35 and pounds by 0.454, then add them together. For 11st 9lb: (11 × 6.35) + (9 × 0.454) = 74.3 kg.
What's the NHS guidance on weight management?
The NHS recommends losing weight at 0.5 to 1 kg per week alongside a balanced diet and regular physical activity. The NHS Weight Loss Plan offers free online support. Your GP can advise on whether additional support or interventions are appropriate for your health.
Why does height matter when assessing weight?
Weight alone doesn't determine health — height does. BMI combines height and weight to estimate body composition and health risk. Two people weighing 74.3 kg can have very different health profiles depending on their height. This is why BMI, not absolute weight, guides NHS health assessments.
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.