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's 105kg in Stone?
105kg converts to 16 stone and 8.3 pounds using the standard UK weight conversion. This is a straightforward conversion using the formula that 1 stone equals 6.35029 kilograms. If you're tracking your weight or comparing measurements across UK and metric systems, our free weight converter above lets you switch between kg, stone, and pounds instantly. Understanding your weight in both units is helpful for health discussions with your GP and for following UK health guidance from the NHS.
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.
Converting 105kg to Stone and Pounds
105kg = 16 stone 8.3 pounds (or 16st 8.3lbs in traditional UK notation).
To break this down: first divide 105 by 6.35029 to get 16.536 stone. The whole number (16) is your stones. Multiply the decimal (0.536) by 14 to get the additional pounds: 0.536 × 14 = 7.5 pounds, which rounds to 8.3 pounds.
This conversion is useful when:
- Discussing weight with healthcare professionals who may use either system
- Following UK diet programmes or health guidelines that reference stone
- Comparing your weight against NHS health charts and BMI categories
- Tracking weight loss or gain across metric and imperial measurements
Use our weight converter tool above to convert any weight between kg, stone, and pounds 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.
105kg in Health Context
At 105kg, your health context depends on your height. For example, if you're 1.73m (5ft 8in) tall, a weight of 105kg gives a BMI of approximately 35.1, which falls in the obese category according to NHS guidelines. If you're taller—say 1.85m (6ft 1in)—the same weight gives a BMI of around 30.7, still in the obese range but lower.
The NHS recommends a BMI between 18.5 and 24.9 for most adults as a healthy weight range. Calculate your personal BMI using our free BMI calculator on this page to see where your weight sits relative to NHS health categories. Your GP can provide personalised guidance on whether weight management would be beneficial for your individual health.
- 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.
Is 105kg overweight or obese?
Whether 105kg is overweight or obese depends on your height. Use our free BMI calculator to find your personal BMI. As a rough guide, 105kg is likely in the obese range (BMI 30+) for most UK adults, though taller individuals may fall into the overweight category. Only your GP can assess what's healthy for you personally.
What's a healthy weight for my height if I'm 105kg?
Healthy weight ranges vary by height. The NHS BMI calculator gives a healthy range for any height. For example, at 1.75m (5ft 9in), a healthy weight is roughly 56–77kg. At 1.85m (6ft 1in), it's roughly 63–88kg. Your GP can advise on a realistic and healthy target weight for you.
How much weight would I need to lose to reach a healthy BMI?
The amount varies by your height and current health. At 105kg and 1.75m tall, reaching the upper healthy limit (BMI 24.9) would mean losing approximately 28kg. At 1.85m, you'd need to lose roughly 17kg. These are approximate figures—discuss realistic targets with your GP.
Can I use this conversion to track weight loss?
Yes, absolutely. Converting your weight between kg and stone helps you track progress in whichever unit feels natural to you. Many UK weight loss programmes use stone, while health apps often use kg. Our free progress tracker lets you log weight in either unit and monitor your journey over time.
What if I'm considering weight loss treatment—where do I start?
Start by speaking with your GP, who can assess your overall health and discuss options including lifestyle changes, NHS weight management services, or prescription treatments like GLP-1 medications (Mounjaro or Wegovy) if appropriate. Weight loss is most effective when combined with dietary changes and physical activity.
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.