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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How To Convert Kg To Stone And Pounds In The UK
If you need to convert kilograms to stone and pounds, you've come to the right place. In the UK, we use stone and pounds for body weight, while healthcare professionals often use kilograms. Understanding how to convert between these units is essential for tracking your health and fitness goals. This guide explains the exact conversion formula, provides a comprehensive reference table covering typical adult weights, and shows you how these conversions relate to your BMI and overall health using NHS guidelines.
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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.
Kg To Stone Conversion Formula And Reference Table
The exact conversion formula is simple: divide kilograms by 6.35029 to get stone. One kilogram equals 0.157473 stone, and one stone equals exactly 6.35029 kg. For pounds, multiply kilograms by 2.20462 to convert to lbs. You can also use our free weight converter on this page to instantly convert any weight between kg, stone, and pounds.
Here's a comprehensive conversion table covering the typical adult weight range in the UK:
- 50 kg = 7st 12.8lbs
- 60 kg = 9st 6.4lbs
- 70 kg = 11st 0.1lbs
- 80 kg = 12st 8lbs
- 90 kg = 14st 2lbs
- 100 kg = 15st 10lbs
- 110 kg = 17st 4lbs
- 120 kg = 18st 13lbs
- 130 kg = 20st 7lbs
- 140 kg = 22st 0lbs
- 150 kg = 23st 8lbs
For values between these points, use the conversion formula or the weight unit converter tool available on this page for instant, accurate results.
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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.
UK Weight Measurement Context And When Each Unit Is Used
In UK culture, stone and pounds remain the preferred way to describe body weight in everyday conversation. Most UK adults refer to their weight in stone — for example, "I weigh 11 stone" — even though the NHS and medical professionals increasingly use kilograms for clinical accuracy. Kilograms are the metric imperial conversion standard used globally and are essential for calculating BMI and comparing health data across different regions. Understanding both systems helps you navigate healthcare conversations with your GP, use health apps effectively, and track your weight loss progress using NHS health guidelines and targets.
- 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 kg to stone conversion?
Divide kilograms by 6.35029 to get stone. Alternatively, one kilogram equals 0.157473 stone. For example, 70 kg ÷ 6.35029 = 11.03 stone (11 stone 0.4 lbs). Use our free weight converter for instant conversions.
How do I convert stone and pounds back to kg?
Multiply stone by 6.35029, then multiply pounds by 0.453592, and add the results together. For example, 11 stone (154 lbs) = (11 × 6.35029) + (0 × 0.453592) = 69.85 kg. The converter tool handles this automatically.
Why does the UK use stone instead of kg for weight?
Stone is a traditional British measurement system that remains culturally embedded in UK society. The NHS uses kilograms for clinical measurements and BMI calculations, but most UK adults still express their weight in stone and pounds in everyday life. Both systems are equally valid depending on context.
What is a healthy weight range in kg and stone?
According to NHS guidelines, a healthy BMI is 18.5 to 24.9. For an adult of average height (5ft 8in or 173cm), the healthy weight range is approximately 55–74 kg (8st 8lbs to 11st 10lbs). Use our BMI calculator to find your personal healthy weight range.
How does my weight in kg affect my BMI?
BMI is calculated as weight in kg divided by height in metres squared. Your weight in kilograms is essential for this calculation. For example, 70 kg at 1.73m height gives a BMI of 23.4 (healthy range). Try our free BMI calculator above to check your BMI instantly using 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.