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 to Convert Kilograms to Stone
Converting kilograms to stone is straightforward using the standard conversion formula. In the UK, most people measure body weight in stone and pounds rather than kilograms, so knowing how to convert between these measurements is useful for health consultations, NHS guidance, and personal fitness tracking. This UK health guide explains the exact conversion method and helps you understand what your weight means for your overall health using NHS health advice standards.
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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.
The Kg to Stone Conversion Formula
The exact conversion formula from kilograms to stone is simple: divide the weight in kilograms by 6.35029. This gives you the weight in stone.
- 1 kilogram = 0.157473 stone
- 1 stone = 6.35029 kilograms (exactly 14 pounds)
- For example: 70 kg ÷ 6.35029 = 11.02 stone (or 11 stone 0.1 lbs)
- Another example: 85 kg ÷ 6.35029 = 13.38 stone (or 13 stone 5.3 lbs)
For quick conversions between all three units—kilograms, stone, and pounds—use our free weight converter above. It calculates instantly and handles decimal stone values, which is helpful when comparing your weight to NHS health information and clinical references.
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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.
Understanding Your Weight in UK Health Context
Once you've converted your weight to stone, the next step is to understand what that weight means for your health. The NHS uses BMI (body mass index) as a screening tool, which requires both your weight and height. A healthy BMI for most UK adults is between 18.5 and 24.9, though lower thresholds apply for people of South Asian, Chinese, Black African, or Black Caribbean heritage.
Your GP can provide personalised weight management guidance based on your individual circumstances, medical history, and health goals. If you want to check your BMI instantly, our free BMI calculator above accepts both kilograms and stone, making it easy to see where you fall on the NHS healthy weight scale. This weight management information helps you understand whether lifestyle changes, dietary adjustments, or professional support might be beneficial.
- 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 the exact conversion from kg to stone?
Divide kilograms by 6.35029 to get stone. For example, 70 kg ÷ 6.35029 = 11.02 stone (11 stone and 0.1 lbs). Use our free weight converter above for instant conversions in both directions.
Why do UK people use stone instead of kilograms?
Historically, stone has been the traditional UK unit for body weight. Although the NHS increasingly uses kilograms in clinical settings, most UK adults still prefer to discuss weight in stone and pounds in everyday conversation and personal health tracking.
How do I convert stone back to kilograms?
Multiply the weight in stone by 6.35029 to get kilograms. For example, 11 stone × 6.35029 = 69.85 kg. The weight converter on this page handles both conversions automatically.
Does my weight in stone affect my healthy weight range?
No—healthy weight ranges are the same regardless of the unit used. An NHS healthy BMI (18.5–24.9) applies whether you measure in kilograms or stone. Use our BMI calculator to find your personal healthy weight range based on your height.
Where can I get UK guidance on healthy weight management?
The NHS offers free weight management support through your GP. You can also access the NHS Health Services for weight loss support, and tools like our BMI and weight loss calculators help track progress alongside professional advice.
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.