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 and Pounds
Converting kilograms to stone and pounds is straightforward using the standard UK conversion formula. In the UK, we typically express body weight using stone and pounds rather than kilograms alone, even though the NHS uses kilograms for clinical measurements. Understanding how to convert between these units helps you track your weight across different health resources and makes it easier to compare your measurements with NHS health guidelines. Use our free weight converter above to switch between kg, stone, and pounds instantly, or follow our simple conversion guide below.
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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 and Pounds Conversion Formula
To convert kilograms to stone and pounds, use this formula:
- 1 kilogram (kg) = 0.157473 stone
- 1 stone = 6.35029 kg
- 1 stone = 14 pounds exactly
The easiest method is to divide your weight in kilograms by 6.35029 to get stone, then multiply any remaining decimal by 14 to get pounds. For example, 70 kg ÷ 6.35029 = 11.03 stone, which equals 11 stone and 0.4 pounds (or approximately 11 stone). Most UK adults find it helpful to remember that 1 stone is roughly 6.35 kg — this makes mental calculations easier. Our free weight converter on this page handles these calculations instantly, so you can convert any weight in seconds without needing to remember the formula.
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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.
Common UK Weight Conversions and NHS Health Context
Here are some common weight conversions used in UK health guidance and NHS healthy weight ranges:
- 50 kg = 7 stone 12.8 lbs
- 65 kg = 10 stone 3.2 lbs
- 70 kg = 11 stone 0.1 lbs
- 80 kg = 12 stone 8 lbs
- 90 kg = 14 stone 2 lbs
- 100 kg = 15 stone 10 lbs
The NHS recommends a healthy weight range of 18.5–24.9 BMI for most UK adults, though lower thresholds apply for South Asian, Chinese, Black African, and Black Caribbean populations. Use our free BMI calculator above to see whether your weight falls in the healthy range for your height, combining this with the weight converter for easy reference in both units.
- 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.
Why does the UK use stone and pounds instead of kilograms?
The UK traditionally uses imperial measurements for body weight, unlike most of Europe. Stone and pounds are deeply embedded in UK culture, health conversations, and commercial weight loss programmes. The NHS uses kilograms for clinical records, but patients often prefer stone and pounds — that's why our weight converter offers both units instantly.
How do I convert stone and pounds back to kilograms?
Multiply stone by 6.35029, then multiply pounds by 0.453592, and add them together. For example, 11 stone 4 pounds = (11 × 6.35029) + (4 × 0.453592) = 71.78 kg. Our weight converter on this page does this calculation for you automatically — just enter your weight in stone and pounds to get the exact kilogram equivalent.
What is my healthy weight in stone and pounds according to NHS guidance?
Your healthy weight range depends on your height. For example, at 5ft 8in (173cm), the NHS healthy weight range is approximately 8 stone 10 lbs to 11 stone 10 lbs. Use our free BMI calculator above to calculate your personal healthy weight range based on your exact height and current weight, with instant conversion to both metric and imperial units.
Does my GP record my weight in kilograms or stone?
Your GP's clinical records use kilograms, as this is the NHS standard for medical measurements and international consistency. However, when discussing your weight in conversation, your GP will often use stone and pounds because it's what most UK patients understand intuitively — our weight converter helps bridge this gap.
How accurate is the kg to stone and pounds conversion formula?
The conversion formula is precise to several decimal places. For practical health purposes, small rounding differences (within 0.1 lbs) don't affect your health assessment. The NHS uses both units interchangeably, and our weight converter ensures your conversions are always mathematically accurate for any weight you need to track.
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.