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 8 Stone 10 in Kilograms?
8 stone 10 pounds equals 55.3 kilograms. This is a straightforward weight conversion using the standard UK to metric formula. If you're checking your weight against NHS health guidelines or need to understand your measurement in kilograms, this conversion helps you compare your weight with clinical references, BMI charts, and international health standards. Understanding your weight in both imperial and metric units is useful when discussing health with your GP or reviewing NHS guidance.
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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.
How to Convert 8 Stone 10 to Kilograms
Converting 8 stone 10 pounds to kilograms uses a simple two-step formula. First, convert stone to kilograms: 8 stone × 6.35029 = 50.8 kg. Then, convert the remaining pounds: 10 lbs × 0.453592 = 4.5 kg. Add these together: 50.8 + 4.5 = 55.3 kg.
You can also use our free weight converter above to switch between stone, pounds, and kilograms instantly. The conversion factor is: 1 stone = 6.35029 kg and 1 pound = 0.453592 kg. This standard conversion is recognised by NHS health services and is used consistently across UK clinical measurements. Having your weight in kilograms is essential when calculating your BMI or comparing your weight against NHS healthy weight guidelines.
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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.
8 Stone 10 in Health Context
At 55.3 kg, your weight category depends on your height. For an adult of average UK height (around 170 cm or 5ft 7in), a weight of 55.3 kg typically falls within or near the healthy weight range according to NHS guidelines. However, your personal healthy weight range varies based on your individual height, age, sex, and ethnicity. Use our free BMI calculator above to check your personal BMI and see where your weight sits on the NHS healthy weight scale. If you have questions about whether this weight is healthy for you, your GP can provide personalised guidance based on your health history and 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.
Is 55.3 kg a healthy weight?
Whether 55.3 kg is healthy depends on your height. For someone 170 cm (5ft 7in) tall, this weight is within the healthy range. For someone shorter or taller, it may fall differently. Use our free BMI calculator to check your personal BMI against NHS guidelines, or speak to your GP for tailored advice.
How do I convert stone to kg accurately?
Multiply stone by 6.35029, then add (pounds × 0.453592). For 8 stone 10: (8 × 6.35029) + (10 × 0.453592) = 55.3 kg. Our free weight converter does this instantly if you prefer not to calculate manually.
What's my healthy weight range at 55.3 kg?
Healthy weight depends on height. The NHS recommends a BMI between 18.5 and 24.9. Calculate your BMI using our tool on this page, then discuss any concerns with your GP. For South Asian or Black African backgrounds, slightly different thresholds apply.
Why do NHS services use kilograms?
Kilograms are the standard international unit for clinical measurements, allowing consistency across NHS services and medical records. Many UK people still use stone for personal reference, so knowing both units helps you understand your health data fully.
Should I track my weight in kg or stone?
Either unit works—use whichever feels most natural to you. Many people track in stone for everyday reference but convert to kg for GP appointments or clinical assessments. Our free progress tracker supports both units, so you can log weight however you prefer.
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.