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
Convert Kg To Stone And Pounds With NHS Guidance
Converting kilograms to stone and pounds is essential for UK health conversations, particularly when discussing weight with your GP or following NHS health advice. Unlike most of Europe, the UK uses a unique measurement system combining stone and pounds for body weight — making conversions from metric kilograms a regular necessity. This guide explains the exact conversion formula, provides practical examples, and connects your weight to NHS health guidance so you understand what your measurement means for your wellbeing.
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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 Kg To Stone And Pounds — The Formula
The conversion from kilograms to stone and pounds uses two straightforward formulas. To convert kg to stone: divide kilograms by 6.35029. For example, 70 kg ÷ 6.35029 = 11.04 stone, which equals 11 stone and 0.6 pounds. Alternatively, you can convert kg directly to pounds (multiply by 2.20462), then divide by 14 to get stone and pounds: 70 kg × 2.20462 = 154.3 lbs ÷ 14 = 11 stone 0.3 lbs. Most UK adults find it easier to use our free weight converter above rather than a UK pharmacy calculation — it gives instant, accurate results and removes calculation errors. Understanding these conversions is crucial when reviewing NHS health advice, which often uses metric measurements in clinical settings but relates to stone for practical discussion with patients.
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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 Healthy Weight Ranges — What Your Converted Weight Means
Once you've converted your weight to stone, the next step is understanding where it sits within NHS healthy weight guidance. According to NHS standards, a healthy BMI is 18.5 to 24.9, which translates to specific weight ranges depending on your height. For a person 5ft 8in tall, the healthy weight range is approximately 8st 10lbs to 11st 10lbs (55–74 kg). For someone 5ft 4in tall, it's roughly 7st 10lbs to 10st 4lbs (49–65 kg). These ranges account for individual variation in frame size and muscle mass. Use the BMI calculator on this page alongside the weight converter to determine your personal healthy weight range — your GP can also provide tailored advice specific to your health history and medical needs.
- 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 70 kg to stone and pounds?
70 kg equals 11 stone and 0.6 pounds (or approximately 11 stone 1 lb). Using the conversion formula: 70 ÷ 6.35029 = 11.04 stone. The decimal (0.04) converts to pounds by multiplying by 14, giving 0.6 pounds. Use our free weight converter for instant conversions at any weight.
Why does the UK use stone and pounds instead of kilograms?
Historically, the UK adopted imperial measurements centuries ago. Today, while the NHS uses kilograms clinically, UK adults typically discuss body weight in stone and pounds — making conversions essential for health conversations with your GP or when interpreting NHS guidance alongside personal weight tracking.
How does converted weight relate to NHS healthy weight guidance?
Once converted to stone, your weight can be compared to NHS BMI categories. A healthy BMI (18.5–24.9) corresponds to specific stone and pound ranges depending on height. Our BMI calculator instantly shows whether your converted weight falls within the healthy range for your height according to NHS standards.
Is 80 kg considered overweight according to NHS guidance?
80 kg equals approximately 12st 8lbs. Whether this is overweight depends on your height. For example, at 5ft 8in, 80 kg gives a BMI of 28.7 (overweight category). At 6ft 1in, it gives a BMI of 24.2 (healthy range). Use our BMI calculator to determine your personal category.
Can I use this conversion for weight management or GP discussions?
Absolutely. Converting your weight to stone helps communicate with your GP, track progress on NHS weight management programmes, and compare your weight to NHS guidance. Many UK health services, diet programmes, and progress tracking tools use stone — making accurate conversions vital for consistent monitoring.
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.