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 47kg in Stone and What Does Your BMI Mean?
47kg is equivalent to 7 stone and 5.6 pounds in UK measurements. However, whether this weight is healthy depends entirely on your height. The same weight gives a very different BMI — and NHS health category — depending on how tall you are. Use our free BMI calculator above to find your personal BMI instantly, or read on to see example BMI values across different heights to understand where you fall in the NHS categories.
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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.
47kg BMI at Different Heights
47kg to stone conversion: 47kg equals 7 stone 5.6 pounds exactly. To convert kilograms to stone using the standard metric to imperial weight conversion, divide 47 by 6.35029.
Your BMI depends entirely on your height. Here are example BMI values for someone weighing 47kg:
- At 150cm (4ft 11in): BMI 20.9 — Healthy weight (NHS category)
- At 160cm (5ft 3in): BMI 18.3 — Healthy weight
- At 165cm (5ft 5in): BMI 17.3 — Healthy weight
- At 170cm (5ft 7in): BMI 16.3 — Underweight
- At 175cm (5ft 9in): BMI 15.3 — Underweight
- At 180cm (5ft 11in): BMI 14.5 — Underweight
These are examples only. For your personal BMI, calculate your exact height and weight above using the free converter and calculator on this page.
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 NHS BMI Categories and Limitations
The NHS classifies BMI ranges as: Underweight (below 18.5), Healthy weight (18.5–24.9), Overweight (25.0–29.9), and Obese (30.0 and above). At 47kg, most adults will fall into either the underweight or healthy weight category depending on height.
However, BMI has important limitations. It does not distinguish between muscle and fat — athletes may have a high BMI but low body fat. BMI also ignores where fat is stored; waist circumference matters too. For a complete picture of your health, discuss your weight with your GP, especially if you are significantly underweight.
- 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 and 5.6 pounds. To convert kilogrammes to stone, divide the kg value by 6.35029. This weight is common for shorter adults or younger people.
Is 47kg a healthy weight?
It depends on your height. At 150cm, 47kg is healthy (BMI 20.9). At 170cm or taller, it may be underweight. Use our free BMI calculator above to check your personal BMI and NHS category based on your exact measurements.
What is my BMI if I weigh 47kg?
Your BMI is calculated using your height and weight. At 47kg, BMI ranges from about 14.5 (tall adult) to 20.9 (shorter adult). Use the BMI calculator on this page to enter your height and get your exact BMI instantly.
Is 47kg underweight?
Not necessarily — it depends on your height. Shorter adults (under 160cm) at 47kg typically fall into the healthy weight range. Taller adults may be underweight. Your GP can advise whether your weight is appropriate for your individual health and frame.
How do I convert weight between metric and imperial?
Use our free weight converter above to switch between kg, stone, and pounds instantly. For a UK pharmacy conversion: divide kg by 6.35029 to get stone, or multiply kg by 2.20462 to get pounds. This works for any weight value.
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.