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
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Is 108 Kg A Healthy Weight? Convert To Stones And Check
At 108 kg, your weight in stone is 17 stone and 1 pound. But whether this is healthy depends entirely on your height, age, and overall health. The NHS uses BMI (body mass index) to assess healthy weight, and the same weight can be overweight for one person and healthy for another. This guide shows you how to find your healthy weight range and understand what 108 kg means for your health in UK measurements.
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.
Healthy Weight Ranges At Different Heights
To find your healthy weight range, you need your height. The NHS defines a healthy BMI as 18.5 to 24.9 — this is your target range. At 108 kg, here's how that translates at common UK heights:
- At 5ft 8in (173cm): 108 kg gives a BMI of 37.8 — this is obese. Healthy range is 56–76 kg (8st 12lbs–12st).
- At 5ft 10in (178cm): 108 kg gives a BMI of 35.1 — obese. Healthy range is 59–79 kg (9st 4lbs–12st 7lbs).
- At 6ft 0in (183cm): 108 kg gives a BMI of 32.3 — still obese. Healthy range is 62–83 kg (9st 11lbs–13st 1lb).
Use our free BMI calculator above to find your exact BMI and healthy weight range based on your actual height. These ranges are starting points — your GP can advise on what's right for you individually.
Clinically BackedWeight Loss
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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.
Next Steps: Check Your Health And Explore Your Options
If 108 kg is above your healthy range, the NHS recommends losing weight at a safe rate of 0.5–1 kg per week. This takes time but supports sustainable change. Start by measuring your waist: men should aim for under 94cm (37in), women under 80cm (31.5in). A healthy waist matters as much as weight itself. Consider speaking to your GP about weight management support — options include behaviour change programmes, dietitian referral, or in some cases prescription weight loss treatment. Even a 5–clinically studied weight loss brings real health benefits.
- 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 does 108 kg equal in stones and pounds?
108 kg equals 17 stone and 1 pound (17st 1lb). To convert kg to stone, divide by 6.35. The weight converter on this page lets you convert between kg, stone, and lbs instantly — useful for tracking weight loss in measurements you prefer.
Is 108 kg overweight or obese?
It depends on your height. At average UK heights (5ft 8in–6ft), 108 kg typically falls in the obese range (BMI 30+). Use the BMI calculator above with your exact height to check. If you're taller or have significant muscle mass, your BMI may be lower.
What's my healthy weight if I'm 5ft 9in?
At 5ft 9in (175cm), your healthy weight range is approximately 57–77 kg (8st 13lbs–12st 2lbs) for a BMI of 18.5–24.9. At 108 kg, your BMI would be around 36.5, which is in the obese range. Your GP can discuss personalised targets.
How quickly can I lose weight from 108 kg?
The NHS recommends safe weight loss of 0.5–1 kg per week through reduced calories and activity. At this rate, losing 10 kg takes 10–20 weeks. Some prescription weight loss medications may accelerate this, but require a GP assessment. Our GLP-1 weight loss calculator can show projected outcomes if you're eligible.
Should I speak to my GP about losing weight from 108 kg?
Yes. Your GP can assess your individual health, discuss weight loss options including lifestyle changes or medication if appropriate, and refer you to specialist support. NHS tier 3 weight management services are available by referral in many areas, though waiting lists vary by region.
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.