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's Your BMI at 11.9 Stone?
11.9 stone is equivalent to 166.6 pounds or approximately 75.5 kilograms. Your BMI at this weight depends entirely on your height — the same weight can fall into different NHS categories depending on how tall you are. Use our free BMI calculator above to check your personal BMI instantly by entering your height and weight. Understanding where you fall on the NHS scale helps you assess your current health position and plan any next steps with your GP.
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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.
BMI at 11.9 Stone — Examples by Height
At 11.9 stone (75.5 kg), your BMI ranges significantly based on height. Here are examples using standard heights:
- 5ft 3in (160 cm): BMI 29.6 — Overweight (NHS category)
- 5ft 6in (168 cm): BMI 27.3 — Overweight
- 5ft 9in (175 cm): BMI 25.0 — Healthy weight (upper limit)
- 5ft 10in (178 cm): BMI 24.3 — Healthy weight
- 6ft 0in (183 cm): BMI 22.6 — Healthy weight
To convert kilograms to stone and check your exact BMI, measure your height in metres and divide 75.5 by your height squared. For stone and pounds calculations, use our weight converter tool on this page. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds — your GP can advise if this applies to you.
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.
Understanding BMI Categories and Limitations
According to NHS guidelines, a healthy BMI is between 18.5 and 24.9. At 11.9 stone, whether you fall into the healthy weight category depends on your height — taller individuals are more likely to be in the healthy range, while shorter individuals may fall into the overweight category.
It's important to understand that BMI has limitations. It does not distinguish between muscle and fat — athletes and people with more muscle mass may have a higher BMI but lower body fat percentage. BMI also doesn't account for where fat is stored, which matters for health risk. Your waist circumference is equally important: the NHS recommends measuring at your natural waist level. Use our free weight converter to check alternative measurements, and speak with your GP for personalised health advice alongside BMI.
- 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 11.9 stone in pounds?
11.9 stone equals exactly 166.6 pounds (11.9 × 14 = 166.6 lbs). To convert any weight in stone and pounds to lbs, multiply the stone amount by 14 and add any additional pounds. Use our weight converter above for instant conversions between stone, pounds, and kilograms.
Is 11.9 stone a healthy weight?
Whether 11.9 stone is healthy depends on your height and individual health factors. At taller heights (5ft 9in+), it typically falls into the healthy BMI range. At shorter heights (below 5ft 6in), it may fall into the overweight category. Use the BMI calculator on this page to check your personal BMI — it's a useful screening tool though not perfect for everyone.
How do I convert 11.9 stone to kilograms?
11.9 stone equals approximately 75.5 kilograms (11.9 × 6.35 = 75.5 kg). For precise conversions, multiply your stone weight by 6.35029. Our weight converter tool above lets you switch instantly between kg, stone, and pounds — useful for NHS appointments or health tracking.
What BMI range is healthy according to the NHS?
The NHS defines a healthy BMI as 18.5 to 24.9 for most UK adults. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the healthy range is 18.5 to 22.9 due to higher health risks at higher BMI levels. Your GP can discuss what your personal BMI means for your health and whether any action is needed.
Why does the same weight give different BMIs at different heights?
BMI uses the formula: weight (kg) ÷ height (metres)². The same weight distributed across a taller frame results in a lower BMI, while the same weight at a shorter height produces a higher BMI. This is why BMI is a height-adjusted measure — it accounts for how weight is distributed relative to body size. Your GP can explain what your individual BMI means.
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.