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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What is 55kg in Stones and Pounds?
55kg is equal to 8 stone and 9.2 pounds (or 8st 9lbs in standard UK notation). This is a straightforward metric to imperial weight conversion using the standard kilogram to stone conversion formula. If you need to convert kilograms to stone regularly, it's helpful to know that one stone equals exactly 6.35 kilograms. The weight of 55kg falls into the healthy weight range for most adults when combined with appropriate height, though individual health context varies. Use our free BMI calculator above to check how this weight relates to your personal health profile at your specific height.
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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.
Weight Conversion Table — 55kg Nearby Values
To convert 55kg to stone and pounds, divide the kilogram value by 6.35029. Here's a helpful reference table showing 55kg alongside nearby weights in stone and pounds, making it easy to see the metric to imperial weight conversions in context:
- 50kg = 7st 12.8lbs
- 52kg = 8st 3lbs
- 54kg = 8st 7.2lbs
- 55kg = 8st 9.2lbs
- 56kg = 8st 11.4lbs
- 58kg = 9st 1.6lbs
- 60kg = 9st 6.4lbs
This table shows the standard kilogram to stone conversion values. You can also use our free weight converter on this page for any other weight conversion between kg, stone, and pounds instantly.
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.
55kg in Context — Healthy Weight at Different Heights
Whether 55kg is a healthy weight depends on your height. For example, at 5ft 4in (163cm), a weight of 55kg gives a BMI of approximately 21.8, which falls comfortably within the healthy weight range of 18.5 to 24.9 according to NHS guidelines. At 5ft 2in (157cm), the same weight gives a BMI of around 22.3 — also healthy. However, at 5ft 10in (178cm), 55kg would give a BMI of roughly 19.4, still within the healthy range but towards the lower end. Use our free BMI calculator above to enter your actual height and see your personal BMI category and healthy weight range.
- 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.
How do I convert 55kg to stones and pounds manually?
Divide 55 by 6.35029 to get the total stone value (8.66 stone). Multiply the decimal (0.66) by 14 to get pounds (9.2 lbs). So 55kg = 8 stone 9.2 pounds. Use our weight converter above for instant calculations.
Is 55kg a healthy weight?
It depends on your height. At average UK heights (5ft 4in to 5ft 10in), 55kg typically gives a BMI in the healthy range of 18.5 to 24.9. Use the BMI calculator on this page to check your personal BMI and healthy weight range.
What is 55kg in just pounds?
55kg equals approximately 121.3 pounds. Since one kilogram equals 2.20462 pounds, multiply 55 × 2.20462 = 121.25 lbs. This is useful if you need the pure imperial measurement without stone conversion.
How does 55kg compare to average UK adult weight?
The average UK adult woman weighs approximately 71.6kg, so 55kg is below average. The average UK adult man weighs around 85.7kg. Individual health depends on height, body composition, and personal health markers — not just weight alone.
What's the difference between stone and pounds?
One stone equals exactly 14 pounds. Both are imperial weight units used in the UK. Stone is the larger unit (used for total body weight), while pounds are smaller units. 55kg = 8 stone 9 pounds — you can express the same weight in either unit.
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.