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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11.6 Kg in Stone — Healthy Weight Guide for UK Adults
11.6 kilograms is equivalent to 1 stone and 10.2 pounds in UK measurements. Whether this weight is healthy depends entirely on your height, age, and overall health profile. A weight that's healthy for one person may be overweight or underweight for another. The NHS uses BMI (body mass index) as a screening tool to assess whether weight falls within a healthy range. Use our free BMI calculator above to check your personal BMI and healthy weight range based on your actual height — this gives you a much clearer picture than weight alone.
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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.
Healthy Weight Ranges by Height — When 11.6 Kg May Be Appropriate
At 11.6 kg, this weight would only be healthy for very young children or infants — it falls far below the healthy adult range for any height. To understand whether a weight is healthy, you need to calculate BMI using both weight and height together. Here are three realistic examples showing how the same weight converts to stone and pounds, and whether it's healthy:
- At 150 cm (4ft 11in): 11.6 kg gives a BMI of 7.7 — dangerously underweight
- At 160 cm (5ft 3in): 11.6 kg gives a BMI of 7.2 — dangerously underweight
- At 170 cm (5ft 7in): 11.6 kg gives a BMI of 6.8 — dangerously underweight
According to NHS guidelines, a healthy BMI is between 18.5 and 24.9 for most adults. At 11.6 kg, anyone of adult height would be severely underweight. This weight is only appropriate for infants or very young children, who follow different growth charts. If you're an adult at this weight, please contact your GP urgently.
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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.
NHS Guidance and When to Seek Help
The NHS recommends that adults maintain a healthy weight that results in a BMI between 18.5 and 24.9. Being significantly underweight — as 11.6 kg would be for any adult — carries serious health risks including malnutrition, weakened immunity, bone density loss, and fertility problems. Beyond BMI, waist circumference also matters: the NHS flags increased health risk above 94 cm for men and 80 cm for women.
If you're concerned about your weight being too low, speak with your GP. They can assess your individual health, rule out underlying conditions like eating disorders or malabsorption issues, and provide personalised guidance. Try our free weight converter to check your weight in different units, and use the BMI calculator on this page to understand your healthy range based on your actual height.
- 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 11.6 kg in stone and pounds?
11.6 kilograms converts to 1 stone and 10.2 pounds (approximately 1st 10lbs in UK measurements). To convert kilograms to stone, divide by 6.35029. This weight is appropriate only for infants or very young children — it would be dangerously underweight for any adult.
Is 11.6 kg a healthy weight for adults?
No. At 11.6 kg, anyone of adult height would be severely underweight with a BMI well below 18.5 (the lower limit of NHS healthy weight). This weight carries serious health risks and would require urgent medical attention. Use our free BMI calculator to find your healthy range based on your height.
How do I know my healthy weight range?
Your healthy weight depends on your height, age, and frame size. The NHS uses BMI to screen weight health — a healthy BMI is 18.5 to 24.9 for most adults. Calculate your BMI using our free calculator on this page by entering your height and weight, and it will show your healthy range instantly.
When should I contact my GP about my weight?
Contact your GP if you're significantly underweight (BMI below 18.5), losing weight unintentionally, experiencing fatigue or weakness, or struggling with eating. Your GP can assess your individual health, check for underlying causes, and provide personalised guidance tailored to you.
How does the kg to stone conversion work?
To convert kilograms to stone, divide the kilogram amount by 6.35029. Alternatively, multiply kilograms by 0.157473 to get stone. Our free weight converter on this page does this instantly — just enter your weight in kg and switch to stone to see the UK measurement equivalent.
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.