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
How Much Is 55kg in Stone?
55kg is equivalent to 8 stone 8.8 pounds in UK measurements. This conversion uses the standard formula: divide kilograms by 6.35029 to get stone. If you're checking your weight against NHS health guidance or comparing measurements across UK and metric systems, understanding your weight in both units is helpful. Our free weight converter above instantly switches between kg, stone, and pounds, so you can work in whichever unit feels most natural to you.
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.
Understanding 55kg in UK Context
At 55kg (8 stone 8.8lbs), your weight is considered within the healthy range for most UK adults, depending on your height and individual health profile. The NHS uses both kilograms and individual health assessments when evaluating weight, rather than weight alone. To understand whether 55kg is a healthy weight for you personally, your height matters significantly — the same weight can represent a healthy BMI for a taller person and an underweight BMI for a shorter person.
- For someone 5ft 6in (168cm) tall: 55kg gives a BMI of approximately 20.0 — well within the healthy range (18.5–24.9)
- For someone 5ft 2in (157cm) tall: 55kg gives a BMI of approximately 22.4 — still healthy
- For someone 5ft 0in (152cm) tall: 55kg gives a BMI of approximately 23.8 — still healthy
Use our free BMI calculator above to check your personal BMI at 55kg — it takes just seconds and gives you context specific to your 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.
Is 55kg a Healthy Weight for You?
Whether 55kg is healthy depends on your height, age, sex, and overall health profile. The NHS recommends a healthy BMI range of 18.5 to 24.9 for most adults. If you have a South Asian, Chinese, Black African, or Black Caribbean background, the NHS recommends a slightly lower range of 18.5 to 22.9. At 55kg, most adults of average to above-average height fall within these healthy ranges, but your GP can give you personalised guidance based on your individual circumstances, medical history, and fitness level.
If you're thinking about weight loss or weight management, our free weight loss calculator can help you explore what evidence-based weight loss might look like for you, alongside your GP's advice.
- 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 55kg in stone and pounds?
55kg equals 8 stone 8.8 pounds (or approximately 8st 8.8lbs). To convert, divide kilograms by 6.35029. You can also use our free weight converter above to switch between any units instantly.
Is 55kg overweight in the UK?
Whether 55kg is overweight depends on your height. For most UK adults of average height or taller, 55kg is within the healthy BMI range (18.5–24.9). Use our BMI calculator above with your height to check your personal BMI — it takes seconds.
What's the healthy weight range at 55kg?
At 55kg, you're in the healthy range for anyone roughly 5ft 2in (157cm) or taller. Shorter individuals may find 55kg is above their healthy weight range. Your GP or our BMI calculator can assess what's healthy for your specific height.
How do I convert kg to stone easily?
Divide kilograms by 6.35029 to get stone. For 55kg: 55 ÷ 6.35029 = 8.67 stone. Our free weight converter above does this instantly — just enter your weight and select the units you want.
Should I consider weight loss at 55kg?
Weight loss decisions should be based on your BMI, health conditions, and advice from your GP, not weight alone. If you're interested in weight management options, speak to your GP or use our free weight loss calculator to understand evidence-based approaches tailored to your circumstances.
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.