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
47kg to Stone — Healthy Weight Guide
47kg converts to 7 stone 5 lbs using the standard kg to stone conversion. Whether this is a healthy weight depends entirely on your height. A weight of 47kg falls in the healthy range for some adults but may be underweight for taller individuals. Use our free BMI calculator above to check whether 47kg is healthy for your specific height and age, and discover your personal healthy weight range according to NHS guidelines.
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 at Different Heights
At 47kg, whether you're in a healthy weight range depends on your height. The NHS uses BMI (body mass index) to define healthy weight, with a target range of 18.5 to 24.9 for most adults. Here are three examples:
- At 5ft 2in (157cm): 47kg gives a BMI of 19.1 — healthy weight range ✓
- At 5ft 6in (168cm): 47kg gives a BMI of 16.7 — underweight (below 18.5)
- At 5ft 10in (178cm): 47kg gives a BMI of 14.8 — underweight
These examples show why height matters so much. A weight that's healthy at one height can be underweight at another. Calculate your personal BMI using the tool on this page to see whether 47kg is right for 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.
NHS Guidance: Healthy Weight and Next Steps
According to NHS guidelines, a healthy weight range depends on both BMI and waist circumference. If your BMI falls below 18.5, consider speaking with your GP about whether you need support to reach a healthier weight. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends slightly lower BMI thresholds — starting from 18.5 to 22.9.
Remember that weight is just one health marker. Factors like fitness, muscle mass, and overall wellbeing matter too. If you're concerned about whether 47kg is healthy for you, your GP can provide personalised advice based on your individual circumstances.
- 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 47kg in stone and pounds?
47kg equals 7 stone 5 lbs (or 7st 5lbs). To convert kilograms to stone, divide by 6.35029. Use our weight converter above for instant calculations between kg, stone, and pounds in any direction.
Is 47kg a healthy weight?
It depends on your height. At 5ft 2in, 47kg is healthy. At 5ft 6in or taller, it falls below the healthy BMI range of 18.5–24.9. Use our BMI calculator to check your personal healthy weight range.
What's the healthy weight range for my height?
The NHS healthy weight range varies by height. Calculate it using the free BMI calculator on this page — it shows your current BMI and the healthy weight range for your exact height. The lower healthy bound is approximately 18.5 × height(m)², and the upper bound is 24.9 × height(m)².
Should I be concerned if I'm below the healthy BMI range?
If your BMI is below 18.5, it's worth discussing with your GP. Being underweight can affect energy, bone health, and immune function. Your GP can assess your individual situation and recommend support if needed.
Do waist measurements matter as well as weight?
Yes. NHS guidance recommends checking both BMI and waist circumference. Healthy waist circumference is under 94cm for men and under 80cm for women. Excess weight around the stomach carries higher health risks, so waist measurement gives important additional context.
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.