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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56kg in Stone and Pounds — BMI at Different Heights
56kg converts to approximately 3 stone and 13 pounds in UK measurements. However, whether this weight is healthy depends entirely on your height. BMI (body mass index) is the standard tool the NHS uses to assess whether a weight falls into a healthy range. The same weight gives a very different BMI depending on how tall you are. Use our free BMI calculator above to check your personal BMI instantly, or read on to see what 56kg means at various heights across the UK.
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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.
56kg to Stone Conversion and BMI Examples
56kg = 3 stone 13 pounds (or 3st 13lbs) — this is the exact UK conversion. To convert kilograms to stone, divide the weight in kg by 6.35029. At 56kg, here's what your BMI would be at different heights:
- At 160cm (5ft 3in): BMI 21.9 — healthy weight (NHS category)
- At 165cm (5ft 5in): BMI 20.6 — healthy weight
- At 170cm (5ft 7in): BMI 19.4 — healthy weight
- At 175cm (5ft 9in): BMI 18.3 — healthy weight
- At 180cm (5ft 11in): BMI 17.3 — underweight (below 18.5)
As you can see, at 56kg the same weight in stone and pounds gives a healthy BMI for most adults between 160–175cm tall, but falls into the underweight category for taller individuals. Our weight converter helps you switch between metric and imperial measurements instantly.
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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 BMI Categories and What They Mean
The NHS recognises these standard BMI categories for UK adults:
- Below 18.5: Underweight
- 18.5–24.9: Healthy weight
- 25.0–29.9: Overweight
- 30.0 and above: Obese
If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — a healthy BMI range starts at 18.5 but upper limit is 22.9 rather than 24.9. BMI is a useful screening tool, but it has limitations: it doesn't account for muscle mass versus fat, or where fat is stored on your body. Your GP can provide personalised health 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 56kg in stone and pounds?
56kg converts to 3 stone and 13 pounds (3st 13lbs). To convert kilograms to stone, divide the weight by 6.35029. You can also use our free weight converter above to switch between kg, stone, and pounds instantly.
Is 56kg a healthy weight?
It depends on your height. At 56kg, you'd have a healthy BMI (18.5–24.9) if you're between roughly 160–175cm tall. Taller individuals may fall into the underweight category. Use our BMI calculator to check your personal BMI and NHS category.
What BMI does 56kg give at 5ft 6in?
At 168cm (5ft 6in), 56kg gives a BMI of approximately 19.8, which falls firmly in the NHS healthy weight range (18.5–24.9). This is a healthy weight for someone of this height.
Is BMI the only measure of healthy weight?
No. While BMI is a useful screening tool recommended by the NHS, it has limitations. It doesn't distinguish between muscle and fat, and doesn't account for where fat is stored. Waist circumference and overall health markers are also important. Your GP can assess your individual health.
How do I convert 56kg to stone without a calculator?
Divide 56 by 6.35029, which gives approximately 8.82 stone. To express this as stone and pounds: 8 stone = 112 pounds, plus the remaining 0.82 stone × 14 = 11.5 pounds, so approximately 3st 13lbs total. Our weight converter does this automatically.
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.