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
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9 Stone 11 In Pounds — Quick Conversion & Health Context
9 stone 11 pounds equals 137 lbs (or 62.1 kg in metric). If you're checking this weight for health reasons, you're in the right place. This UK health guide explains what this weight means for your BMI, provides context against NHS health thresholds, and shows you how to use your weight for health management. Whether you're tracking weight loss, checking a healthy weight range, or simply converting between UK and imperial measurements, we'll walk you through the numbers and what they mean for your health.
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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.
What Does 9 Stone 11 Mean For Your Health?
At 9 stone 11 (137 lbs or 62.1 kg), your health context depends entirely on your height. BMI is calculated using both weight and height, so a single weight means different things for different people. For example, at 5ft 5in (165 cm), a weight of 9 stone 11 gives a BMI of approximately 23.2 — which falls in the healthy weight range (18.5–24.9) according to NHS guidelines. However, at 5ft 0in (152 cm), the same weight would give a BMI of around 26.8 — classified as overweight.
- Healthy weight range (BMI 18.5–24.9): For most heights between 5ft 4in and 5ft 8in, 9 stone 11 falls within healthy limits
- Overweight range (BMI 25–29.9): For shorter adults (under 5ft 3in), this weight may be overweight
- Individual variation: Muscle mass, age, ethnicity, and overall fitness also affect what weight means for your health
Use our free BMI calculator above to check where you personally sit — it's the most accurate way to assess whether this weight is healthy for your specific height.
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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.
UK Health Tools And NHS Resources
If you're managing your weight or want to understand your health better, the NHS provides excellent free resources. Your GP can assess your individual health using your weight, BMI, waist circumference, and other factors — not weight alone. Track your weight progress using our free progress tracker, or use the weight converter on this page to switch between stone, pounds, and kilograms as you monitor changes. For broader context, the NHS recommends a healthy BMI between 18.5 and 24.9 for most adults, though lower thresholds apply to adults of South Asian, Chinese, Black African, or Black Caribbean heritage. Contact your GP if you have concerns about your weight or would like personalised health advice.
- 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 9 stone 11 in pounds exactly?
9 stone 11 equals exactly 137 pounds (lbs). To convert: multiply the number of stone by 14 (since 1 stone = 14 pounds), then add any additional pounds. So 9 × 14 = 126, plus 11 = 137 lbs total. You can also use our free weight converter above to switch between stone, pounds, and kilograms instantly.
Is 9 stone 11 a healthy weight in the UK?
It depends on your height. 9 stone 11 (137 lbs) falls within a healthy weight range (BMI 18.5–24.9) for most adults between 5ft 4in and 5ft 8in tall. Shorter or taller adults will have different healthy weight ranges. Use our free BMI calculator above to check your personal BMI — it's the most accurate indicator of whether this weight is healthy for you.
What is 9 stone 11 in kilograms?
9 stone 11 equals approximately 62.1 kg. To convert stone and pounds to kilograms: multiply stone by 6.35, then multiply pounds by 0.453592, and add them together. For this weight: (9 × 6.35) + (11 × 0.453592) = 57.15 + 4.99 = 62.1 kg. Our weight converter makes this calculation instant.
How does 9 stone 11 compare to average UK weight?
According to ONS data, the average UK adult woman weighs around 11 stone 3 lbs (71.6 kg) and the average UK adult man weighs around 13 stone 7 lbs (85.7 kg). At 9 stone 11 (62.1 kg), this weight is lower than the UK average for both men and women, though individual healthy weight varies significantly based on height, muscle mass, and other factors.
What should I do if I want to manage my weight?
The NHS recommends a sustainable approach: aim for gradual weight loss of 0.5–1 kg per week through a combination of balanced eating and regular physical activity. Your GP can offer personalised advice and support. If you're interested in weight loss options, track your progress with our free progress tracker, and speak to your GP about what's right for your individual circumstances.
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.