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 Stones To Kg — NHS Health Guide
Converting your weight from stones to kilograms is straightforward using the standard conversion formula. This guide shows you how to convert stones to kg accurately, with NHS health guidance and context for UK adults. Whether you're tracking your weight for health reasons, preparing for a GP appointment, or using NHS health advice, understanding both measurements helps you make informed decisions about your wellness. Use our free weight converter above to instantly switch between stones and kilograms, and explore your healthy weight range according to NHS guidelines.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 Stones To Kilograms
The conversion formula from stones to kilograms is straightforward: divide the number of stones by 6.35029 to get kilograms. Alternatively, multiply kilograms by 6.35029 to convert to stones.
- 1 stone = 6.35029 kg (exact conversion)
- 1 stone = 14 pounds (exactly)
- Quick approximation: 1 stone ≈ 6.35 kg
For example, 11 stones equals approximately 69.85 kg. Use our free weight converter tool above to instantly convert between stones, kilograms, and pounds. This eliminates calculation errors and saves time, particularly when tracking weight changes or understanding NHS health guidance. The converter works in both directions, so you can move between imperial and metric measurements instantly.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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 Using Kg
According to NHS guidance, a healthy weight range for adults is a BMI between 18.5 and 24.9. Your healthy weight in kilograms depends on your height. For example, if you're 1.73 metres (5ft 8in) tall, a healthy weight range is approximately 55–74 kg (8st 10lbs to 11st 10lbs).
If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds starting at a BMI of 18.5–22.9. Calculate your personal BMI and healthy weight range using the free BMI calculator on this page, which accounts for your height and gives NHS-aligned guidance tailored to you.
Weight management is a key part of NHS health advice. Understanding your weight in both stones and kilograms helps you track progress and communicate effectively with your GP. Whether you're exploring weight loss options, managing a health condition, or simply monitoring your wellness, having your weight in kg is useful for clinical settings, NHS services, and many digital health tools.
Remember, weight is just one aspect of health. Your GP can give you personalised advice about whether your weight is healthy for you personally, considering factors like age, medical history, fitness level, and overall health. Use the free weight converter and BMI calculator above alongside NHS health information to support informed conversations with your healthcare team.
- 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 stones to kg?
One stone equals exactly 6.35029 kilograms. To convert, divide the number of stones by 6.35029. For example, 12 stones ÷ 6.35029 = 18.9 kg. The weight converter tool above calculates this instantly and accurately for any value.
What is a healthy weight in kg according to NHS guidelines?
A healthy BMI for UK adults is 18.5–24.9, which translates to different kg ranges depending on height. At 1.73m tall, healthy weight is roughly 55–74 kg. Use the BMI calculator on this page to find your personal healthy weight range based on your height.
Why do UK health services use kg instead of stones?
The NHS uses kilograms for clinical measurements and records because kg is the standard medical unit worldwide. This allows accurate prescribing, health monitoring, and communication between healthcare services. However, many UK adults prefer stones for personal tracking—use both for clarity.
How often should I check my weight and track progress?
The NHS recommends weighing yourself weekly at the same time of day (typically morning before eating) for consistency. However, weight fluctuates daily due to water, food, and hormones. Tracking weekly averages rather than daily fluctuations gives a clearer picture. Use our free progress tracker to log weight changes over time.
Does weight in kg tell me if I'm at a healthy weight?
Weight alone doesn't tell the full story—your height matters too, which is why BMI is used. A healthy weight in kg varies significantly by height. Your GP considers BMI, waist circumference, fitness, age, and medical history. Calculate your BMI using the free calculator on this page for NHS-aligned guidance personalised to you.
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.