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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Converting Kilograms to Stones and Pounds
In the UK, body weight is traditionally measured in stones and pounds, while kilograms are used in clinical settings and by the NHS. Converting kg to stones and pounds is straightforward once you know the conversion factor. This uk health guide explains how to convert any weight between metric and imperial measurements, along with NHS guidance on healthy weight ranges for UK adults. Whether you're checking your own weight or understanding health information, knowing how to convert between these units is essential.
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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 Kilograms to Stones and Pounds
The conversion formula is simple: divide the kilogram weight by 6.35029 to get stones, or multiply by 2.20462 to get pounds. For a more practical approach, use our free weight converter above to convert instantly between kg, stones, and pounds.
- 1 kilogram = 0.157473 stone (or 2.20462 pounds)
- 1 stone = 6.35029 kilograms exactly
- 1 pound = 0.453592 kilograms
- 1 stone = 14 pounds (exact conversion)
Example: 70 kilograms ÷ 6.35029 = 11.02 stones, or approximately 11 stone and 0.1 pounds. For everyday UK health guidance, NHS measurements use kilograms but your GP and health conversations typically reference stones and pounds, making the conversion essential for understanding your own health information.
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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 Guidance and Healthy Weight Ranges for UK Adults
The NHS uses kilograms and BMI as the primary measure of healthy weight for UK adults. A healthy BMI falls between 18.5 and 24.9, which translates to different stone and pound ranges depending on your height. For example, at 5ft 8in (173cm), a healthy weight range is approximately 8st 10lbs to 11st 10lbs (55–75 kg).
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds due to higher health risks at lower weights. Your GP can provide personalised nhs health advice about what a healthy weight means for you specifically. Use our free BMI calculator on this page to check your personal BMI and see where you fall within the NHS healthy weight ranges.
Converting Your Weight and Tracking ProgressOnce you know your weight in both kg and stones and pounds, you can easily track changes in either unit. Our free weight converter tool on this page lets you switch between measurements instantly, and our progress tracker helps you log your weight over time using whichever unit you prefer. Many UK adults find it helpful to know their weight in both formats—kilograms for clinical conversations with your GP, and stones and pounds for everyday UK health information and general awareness.
If you're interested in weight management, our bmi calculator provides immediate NHS-aligned guidance on whether your current weight is healthy, overweight, or in the obese range. Understanding your weight in UK measurements is the first step toward informed health decisions.
- 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 formula to convert kg to stones and pounds?
Divide kilograms by 6.35029 to get stones. To also calculate the pounds remainder, take the decimal portion, multiply by 14, and round. Example: 70 kg ÷ 6.35029 = 11.02 stones = 11 stone and 0.3 pounds. Our weight converter tool does this instantly for you.
Why do the UK and NHS use both kilograms and stones?
The NHS officially uses kilograms for clinical measurements and guidelines, but UK culture traditionally measures body weight in stones and pounds. This dual system means understanding both conversions is essential for interpreting your own health information and GP advice.
What is a healthy weight in stones and pounds according to the NHS?
Healthy weight depends on your height and BMI. For example, at 5ft 8in, the NHS healthy weight range is approximately 8st 10lbs to 11st 10lbs. Use our free BMI calculator above to find your personal healthy weight range based on your specific height and the latest NHS guidance.
How do I convert stones and pounds back to kilograms?
Multiply stones by 6.35029, multiply pounds by 0.453592, then add them together. Example: (11 × 6.35029) + (0.3 × 0.453592) = 69.9 kg. Our weight converter handles this calculation automatically for you.
Is my weight healthy if I convert it to stones and pounds?
Converting your weight to stones and pounds alone doesn't tell you if it's healthy—your height matters too. That's why the NHS uses BMI, which combines weight and height. Use our BMI calculator on this page to check your personal BMI and whether your weight falls within the NHS healthy range for your height.
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.