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
What Is 103 Kg In Stone?
103 kilograms is equal to 16 stone and 3.7 pounds (16st 3.7lbs) in UK measurements. This conversion uses the standard UK health guide formula where one stone equals 6.35029 kilograms. If you're checking this weight in relation to your health, our free BMI calculator and weight converter above can help you understand what this means for your personal health context using NHS guidance. Many people find it useful to track their weight in both metric and imperial units, especially when comparing health records or discussing weight with your GP.
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.
103 Kg In Stone — Health Context
At 103 kg, your health context depends on your height, age, and overall fitness. Using NHS guidance, we can calculate what this weight means for you personally. For example, if you're 1.73 metres tall (5ft 8in), a weight of 103 kg gives a BMI of approximately 34.4, which falls into the obese range according to NHS categories. However, BMI is a screening tool only — it doesn't account for muscle mass, bone density, or where fat is stored on your body.
- NHS healthy weight range varies by height — use our free BMI calculator to check your personal range
- Waist measurement is also important — men over 102cm (40in) and women over 88cm (34.5in) face increased health risks regardless of BMI
- Weight is influenced by genetics, medical conditions, medications, and lifestyle factors — not just diet alone
If you have concerns about your weight or health, your GP can provide personalised NHS health advice and discuss weight management options suited to your individual circumstances.
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.
UK Weight Management Resources
The NHS offers several free resources to support healthy weight management. The NHS Weight Loss Plan is available to all UK adults and provides practical guidance on nutrition, physical activity, and behaviour change. If you're overweight or obese and have weight-related health conditions — such as type 2 diabetes, high blood pressure, or sleep apnoea — your GP can refer you to specialist tier 3 weight management services available across the UK.
- Track your progress with our free progress tracker to monitor changes over time
- Use our weight converter to switch between kg, stone, and pounds as needed
- Speak to your GP about NHS weight management support in your area — waiting times and services vary by region
- 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.
How do I convert 103 kg to stone and pounds?
Divide 103 by 6.35029 to get stone, then multiply the decimal by 14 to get pounds. 103 kg = 16.23 stone = 16 stone 3.7 pounds. Our free weight converter above does this calculation instantly for any weight you need to convert between metric and imperial UK measurements.
Is 103 kg a healthy weight?
This depends on your height, age, and body composition. Calculate your BMI using our free BMI calculator above — if you're average height (1.70m), 103 kg gives a BMI of around 35.6, which is in the obese range according to NHS guidelines. Your GP can assess your individual health and discuss options if needed.
What is the NHS guidance for someone at 103 kg?
The NHS recommends a healthy BMI between 18.5 and 24.9 for most adults. For people of South Asian, Chinese, Black African, or Caribbean heritage, lower thresholds apply. If you have health conditions linked to weight, the NHS Weight Loss Plan or specialist services may be available through your GP.
How much weight loss would be healthy from 103 kg?
The NHS recommends losing no more than 0.5 to 1 kg per week for sustainable, safe weight loss. Even a 5–10% reduction in body weight can improve blood pressure, blood sugar control, and other health markers. Always discuss weight loss plans with your GP or a healthcare professional.
Where can I find NHS weight management support?
Start by speaking to your GP, who can assess your health and refer you to tier 3 specialist weight management services if appropriate. The NHS Weight Loss Plan is also available free online. Support and waiting times vary significantly across different UK regions and local integrated care boards.
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.