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 does 105 kilograms mean for your health in the UK?
105 kilograms is equivalent to 16 stone and 7 pounds in UK measurements. For most adults, this weight falls into the overweight or obese category depending on height and individual factors. Understanding where your weight sits on the NHS health scale is an important first step toward making informed decisions about your health. Use our free weight converter to see this figure in different units, and our BMI calculator to understand what 105kg means for your personal health profile.
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 105kg relates to NHS healthy weight guidance
According to NHS guidelines, a healthy weight range depends on your height and age. At 105kg, most adults will have a BMI above 30, which falls into the obese category. However, the exact health implications depend on your individual circumstances—height, muscle mass, age, and any existing health conditions all matter.
- BMI at 105kg: For a 5ft 8in adult (average UK height), 105kg gives a BMI of approximately 35, classified as obese (Class II)
- Health context: Carrying excess weight at this level increases the risk of type 2 diabetes, high blood pressure, cardiovascular disease, and joint problems
- NHS support available: The NHS offers free weight management support through tier 1 services including digital tools, weight management apps, and community programmes
Use our free BMI calculator above to discover your exact BMI and what it means for your health. Your GP can provide personalised advice about whether your weight poses any specific health risks based on your medical history.
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 and next steps
If you're interested in managing your weight, the NHS provides structured support across several tiers. Tier 1 includes self-help tools and digital support—this is where most people start. If you'd like more structured help, your GP can refer you to tier 2 or tier 3 services, which include specialist weight management programmes and, where appropriate, prescription medication support.
- Track your progress using our free progress tracker to monitor changes over time
- Combine dietary changes with increased physical activity for sustainable results
- The NHS recommends losing weight at a rate of 0.5–1kg per week for lasting success
- Speak to your GP about weight management options suited to your health profile
- 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 105kg in stone and pounds?
105 kilograms converts to 16 stone and 7 pounds (16st 7lbs). Use our free weight converter above to convert between kg, stone, and pounds instantly for any weight value.
What is the BMI for someone who weighs 105kg?
BMI at 105kg depends on height. For an average UK adult height of 5ft 8in (173cm), a weight of 105kg gives a BMI of approximately 35, which falls into the obese (Class II) category according to NHS guidelines. Calculate your personal BMI using our free BMI calculator above.
Is 105kg considered obese in the UK?
At 105kg, most adults will have a BMI in the obese range. However, this depends on height—taller individuals may have a lower BMI at the same weight. The NHS classifies a BMI of 30–34.9 as obese Class I, and 35–39.9 as obese Class II. Your GP can advise on what this means for your individual health.
What health risks are associated with weighing 105kg?
Carrying weight in the 105kg range increases the risk of type 2 diabetes, high blood pressure, cardiovascular disease, obstructive sleep apnoea, and joint stress. Even modest weight loss of 5–10% of body weight can reduce these risks significantly. Speak to your GP for personalised health advice.
What weight management support is available through the NHS?
The NHS offers free weight management support through tier 1 digital tools and community programmes, and tier 2–3 specialist services if referred by your GP. Tier 3 services can include prescription weight management medication alongside lifestyle support. Your GP can discuss which option is right for 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.