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 9 Stone in Pounds?
9 stone is equal to 126 pounds (126 lbs). This is a straightforward conversion using the standard UK measurement where 1 stone equals exactly 14 pounds. At 9 stone, an adult's health context depends on their height and age. The NHS uses both metric (kg) and imperial (stone and pounds) measurements, and understanding your weight in familiar units helps you engage with health guidance. Use our free weight converter to switch between stone, pounds, and kilograms instantly, and our BMI calculator to check what this weight means for your personal health.
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.
Converting 9 Stone to Pounds and Understanding Health Context
9 stone = 126 pounds exactly. This comes from the simple rule that 1 stone = 14 pounds, so 9 × 14 = 126 lbs. In kilograms, 9 stone is approximately 57.2 kg.
For UK health guidance, what matters is not just the absolute number, but how your weight relates to your height and age. The NHS uses BMI (body mass index) as a screening tool to categorise weight ranges. At 126 lbs, whether you fall into a healthy weight range, overweight, or other category depends entirely on your height.
- If you're 5ft 4in tall (163cm), a BMI of around 21.6 would fall in the healthy weight range (18.5–24.9).
- If you're 5ft 0in tall (152cm), the same weight would give a BMI of around 23.3 — still healthy.
- If you're 6ft 0in tall (183cm), 9 stone would give a BMI of around 17.1 — below the healthy range.
Remember: BMI is a useful screening tool but it doesn't account for muscle mass, bone density, or where fat is stored on your body. Your GP can provide personalised health advice based on your complete health picture.
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.
NHS Guidance and Using UK Health Tools
The NHS recommends a healthy BMI range of 18.5 to 24.9 for most adults. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds (18.5 to 22.9), as these groups face higher health risks at the same BMI levels.
Rather than focusing on a single number in pounds or stone, the NHS encourages looking at your overall health, including waist circumference, fitness level, and any existing health conditions. If you're concerned about your weight, your GP can assess your individual health risk and discuss whether any lifestyle changes or support might be beneficial.
Use the free BMI calculator on this page to find your personal BMI using your height and weight, and the weight converter to check equivalents in kg, stone, or pounds whenever you need it.
- 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.
How do I convert 9 stone to pounds?
Multiply stone by 14. So 9 stone × 14 = 126 pounds. This is an exact conversion — 1 stone always equals exactly 14 pounds in the UK measurement system. You can also use our free weight converter above to convert between stone, pounds, and kilograms instantly.
What is 9 stone in kilograms?
9 stone is approximately 57.2 kg. To convert stone to kilograms, divide by 6.35 (or multiply stone by 0.157473). So 9 ÷ 6.35 = 57.2 kg. This is helpful if you're reading UK health guidance that uses metric units.
Is 9 stone a healthy weight?
Whether 9 stone (126 lbs / 57.2 kg) is healthy depends on your height and age. The NHS uses BMI to assess this. At 5ft 4in, 9 stone gives a healthy BMI; at 5ft 0in, it's still healthy; at 6ft 0in, it would be underweight. Use our BMI calculator to check your personal result — your GP can then discuss whether your weight is healthy for you.
What does the NHS say about healthy weight?
The NHS recommends a BMI of 18.5 to 24.9 as healthy for most UK adults (or 18.5 to 22.9 for South Asian, Chinese, Black African, or Black Caribbean adults). Your weight in stone or pounds is less important than where you fall within these BMI ranges based on your height. Speak to your GP if you have concerns.
How can I track my weight in UK measurements?
The NHS and most UK health services use stone and pounds for body weight and kg for clinical data. Our free progress tracker lets you log your weight in stone, pounds, or kg and monitor changes over time. Our weight converter helps you switch between units whenever you need to.
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.