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
Is 47.2kg in Stone a Healthy Weight?
47.2kg converts to approximately 7 stone 6 pounds (7st 6lbs). Whether this is a healthy weight depends entirely on your height. For a shorter adult, this weight may fall within the healthy range. For a taller person, it could indicate being underweight. Use our free BMI calculator above to check your personal BMI instantly — this will tell you whether 47.2kg is healthy for your specific height and give you personalised guidance.
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.
Healthy Weight Ranges by Height
According to NHS guidelines, a healthy BMI falls between 18.5 and 24.9. At 47.2kg, whether you're in this range depends on your height. Here are three examples showing how height makes all the difference:
- At 160cm (5ft 3in): 47.2kg gives a BMI of 18.4 — just below the healthy range, suggesting underweight status
- At 150cm (4ft 11in): 47.2kg gives a BMI of 21.0 — solidly within the healthy weight range
- At 165cm (5ft 5in): 47.2kg gives a BMI of 17.4 — underweight, requiring medical review
Use our weight converter to check your exact weight in different units, and combine it with the BMI calculator to find your personal healthy weight range based on your actual height.
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 What to Do Next
The NHS recommends a healthy BMI of 18.5–24.9 for most UK adults. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS suggests slightly lower thresholds (18.5–22.9). Waist measurement also matters: aim for under 80cm (31.5in) for women or 94cm (37in) for men to reduce health risks.
If your BMI is below 18.5, speak to your GP about whether this weight is appropriate for your health. If you're concerned about being underweight, your GP can assess your overall health and lifestyle. If you're above the healthy range, our GLP-1 weight loss calculator can help you explore evidence-based options.
- 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 47.2kg in stone and pounds?
47.2kg equals approximately 7 stone 6 pounds (7st 6lbs). To convert kg to stone, divide by 6.35. To convert kilograms to stone more precisely, 47.2 ÷ 6.35 = 7.43 stone, which is 7 stone and 6 pounds.
How do I know if 47.2kg is healthy for me?
Calculate your BMI using our free BMI calculator on this page. Your healthy weight depends on your height. A BMI between 18.5 and 24.9 is considered healthy by the NHS. For example, at 160cm this weight is underweight; at 150cm it's healthy.
Is 47.2kg underweight?
It depends on your height. At 160cm or taller, 47.2kg is likely underweight (BMI below 18.5). At shorter heights like 150cm, it falls within the healthy range. Your GP can advise whether your weight is appropriate for your individual health.
What should my healthy weight range be?
Your healthy weight range depends on your height and ethnicity. The NHS recommends a BMI of 18.5–24.9. For South Asian, Chinese, Black African, or Black Caribbean adults, 18.5–22.9 is recommended. Use our weight converter and BMI calculator to find your specific range.
What should I do if I'm underweight?
If your BMI is below 18.5, speak to your GP. Being underweight can indicate underlying health issues or nutritional concerns. Your GP can assess your health, discuss your lifestyle, and recommend appropriate support. Don't self-diagnose — professional guidance is important.
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.