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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17.5 Stone to Kg — Instant Conversion
17.5 stone is equal to 111.13 kilograms. This conversion uses the standard metric to imperial weight formula that translates between UK stone measurements and kilograms. Whether you're checking your weight against NHS guidelines, comparing international health standards, or simply need to convert stone to kg for medical purposes, this guide provides the exact conversion plus important health context. Use our free weight converter above to switch between stone, pounds, and kilograms instantly.
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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.
17.5 Stone to Kg Conversion Table
17.5 stone = 111.13 kg exactly.
To convert stone to kilograms, multiply the stone value by 6.35029. The conversion formula is: stone × 6.35029 = kg. For 17.5 stone: 17.5 × 6.35029 = 111.13 kg.
Here are nearby conversions to help you compare:
- 17 stone = 107.95 kg
- 17.25 stone = 109.54 kg
- 17.5 stone = 111.13 kg
- 17.75 stone = 112.72 kg
- 18 stone = 114.30 kg
This kilogram to stone conversion is the standard used by UK healthcare providers, NHS guidelines, and international health assessments. Our free weight converter tool above allows you to instantly switch between any stone, pound, and kilogram values.
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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.
BMI Context at 17.5 Stone
At 17.5 stone (111.13 kg), your BMI depends on your height. For example, at average UK heights:
- At 5ft 6in (168cm): BMI = 35.8 (Obese Class I)
- At 5ft 8in (173cm): BMI = 33.9 (Obese Class I)
- At 5ft 10in (178cm): BMI = 32.2 (Obese Class I)
Calculate your exact BMI using our free BMI calculator above — this accounts for your individual height and gives you a personalised health context. A BMI in the 30-35 range is associated with increased health risks. Even a 5-10% weight reduction can improve blood pressure, blood sugar, and cardiovascular 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 17.5 stone considered overweight or obese?
At 17.5 stone (111.13 kg), BMI classification depends on height. At typical UK adult heights (5ft 6in to 5ft 10in), a weight of 17.5 stone generally falls into Obese Class I (BMI 30-35). The NHS recommends a healthy weight range of BMI 18.5-24.9. Your GP can provide personalised health advice based on your individual circumstances.
What is the exact kg to stone conversion formula?
To convert kilograms to stone, divide the kilogram value by 6.35029. The formula is: kg ÷ 6.35029 = stone. To convert stone to kilograms (the reverse), multiply by 6.35029. For 17.5 stone: 17.5 × 6.35029 = 111.13 kg. Our weight converter tool above performs these calculations instantly.
How does 17.5 stone compare to healthy weight ranges?
A healthy weight range for most UK adults falls between BMI 18.5 and 24.9. At 17.5 stone, you would typically need to lose weight to reach a healthy BMI, though the exact target depends on your height. A loss of 10-15% of body weight can significantly improve health markers. Consult your GP for personalised weight management guidance.
Is 17.5 stone a common weight in the UK?
According to NHS data, the average UK adult weighs approximately 82-85 kg (13st 0lb to 13st 5lb). At 111.13 kg (17.5 stone), you are above the current UK average. The NHS also notes that around 63% of UK adults are overweight or obese, showing that weight management is a common health concern.
Can I use this conversion for medical appointments?
Yes, you can use this conversion at medical appointments. Most NHS clinics record weight in kilograms for consistency, whilst many UK patients think in stone and pounds. Converting 17.5 stone to 111.13 kg ensures accurate records. Always tell your healthcare provider your weight in both units to avoid confusion.
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.