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
108 Kg In Stones — What's Your BMI?
108 kg converts to approximately 17 stone and 0.1 pounds (or 17st 0lb) in UK measurements. However, your BMI at this weight depends entirely on your height — the same weight can represent a healthy BMI for a taller person or overweight for someone shorter. To understand what 108 kg means for your individual health, you'll need to know your height. Use our free BMI calculator above to find your exact BMI instantly, or explore the examples below to see how weight in stone and pounds varies across different heights.
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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.
108 Kg BMI At Different Heights
At 108 kg, your BMI depends directly on height. Here's how this weight translates to BMI across common heights in the UK:
- 160 cm (5ft 3in): BMI 42.0 — Severely obese (Class III)
- 165 cm (5ft 5in): BMI 39.7 — Obese (Class II)
- 170 cm (5ft 7in): BMI 37.3 — Obese (Class II)
- 175 cm (5ft 9in): BMI 35.3 — Obese (Class II)
- 180 cm (5ft 11in): BMI 33.3 — Obese (Class I)
- 185 cm (6ft 1in): BMI 31.6 — Obese (Class I)
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds, meaning the health implications at each BMI level may differ. Calculate your exact BMI using our free BMI calculator on this page to get your personalised result.
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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.
Understanding BMI Categories & Limitations
The NHS defines healthy BMI for most adults as 18.5 to 24.9. At 108 kg, you're likely in the obese range — but BMI is only a screening tool, not a complete health picture. BMI doesn't account for muscle mass (muscle is heavier than fat), where fat is stored, age, or overall fitness. A muscular athlete might have a high BMI but low body fat percentage. Conversely, someone with a healthy BMI might have poor cardiovascular fitness.
Your GP can discuss your individual health, lifestyle, family history, and any weight-related health conditions to give personalised advice. Weight management strategies — from diet and exercise to prescription support — are available through the NHS and private options.
- 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 108 kg in stone and pounds?
108 kg converts to 17 stone and 0.1 pounds (17st 0lb) in UK measurements. To convert kilograms to stone, divide the kilogram value by 6.35029. This metric to imperial weight conversion is standard across UK health, clothing, and diet contexts.
What BMI does 108 kg give?
At 108 kg, your BMI ranges from approximately 31.6 to 42 depending on your height. Use our free BMI calculator above to enter your exact height and get your personal BMI instantly. Each BMI result falls into an NHS category that indicates your health risk level.
Is 108 kg overweight or obese?
At 108 kg, most adults would be classified in the obese range by NHS criteria. However, this depends on height and other factors like muscle mass. Your GP can assess whether your weight poses health risks and discuss support options with you.
Can I lose weight safely from 108 kg?
The NHS recommends losing 0.5–1 kg per week through a combination of dietary changes and increased physical activity. At 108 kg, your GP or a weight management specialist can discuss personalised strategies, which may include lifestyle support, behaviour change programmes, or prescription medications depending on your health.
How does 108 kg compare to average UK weight?
The average UK adult man weighs approximately 85.7 kg and the average woman approximately 71.6 kg. At 108 kg, you're above these averages. However, healthy weight ranges vary significantly by height, age, ethnicity, and muscle mass — use our BMI calculator to see where you fall on the health spectrum.
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.