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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What BMI Is 15.5 Stone? Height-by-Height Breakdown
15.5 stone is equivalent to 217 pounds (approximately 98.4 kg). Your BMI at this weight depends entirely on your height. Using our free BMI calculator, you can see instantly where you fall on the NHS health scale. This guide shows you what BMI 15.5 stone gives at common UK heights, plus which NHS category each falls into and what it means for your health.
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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.
BMI at 15.5 Stone Across Different Heights
To find your BMI at 15.5 stone, we need to know your height. Here are BMI values at common heights for someone weighing 15.5 stone:
- 5ft 4in (163cm): BMI 37.4 — Obese Class II
- 5ft 6in (168cm): BMI 35.1 — Obese Class II
- 5ft 8in (173cm): BMI 33.2 — Obese Class I
- 5ft 10in (178cm): BMI 31.3 — Obese Class I
- 6ft 0in (183cm): BMI 29.6 — Overweight
- 6ft 2in (188cm): BMI 27.9 — Overweight
At 15.5 stone, most adults fall into either the overweight or obese category. The exact classification depends on your height. Use our weight converter and BMI calculator above to find your precise BMI and see your personal NHS health classification instantly.
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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 Your BMI Category and NHS Guidelines
The NHS uses standardised BMI categories to assess weight-related health risk. At 15.5 stone, if you're under about 5ft 10in, you'd likely fall into an obese category. If you're taller, you may be classified as overweight. Important: BMI does not distinguish between muscle and fat — athletes may have high BMI but low body fat.
If you're concerned about your health at this weight, your GP can provide personalised advice. For South Asian, Black African, Black Caribbean, or Chinese adults, lower BMI thresholds apply due to higher health risks at the same weight. Track your progress using our free progress tracker to monitor changes over time.
- 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 15.5 stone convert to in kilograms?
15.5 stone equals approximately 98.4 kg. To convert any weight using the standard stone to kg conversion, multiply the stone weight by 6.35029. Our free weight converter on this page does this instantly for any value.
Am I overweight or obese at 15.5 stone?
It depends on your height. At 15.5 stone, shorter adults (under 5ft 8in) typically fall into an obese category, whilst taller adults may be classified as overweight. Calculate your exact BMI using the free BMI calculator above to see your personal NHS category.
What's a healthy weight for my height?
A healthy weight depends on your height. The NHS healthy BMI range is 18.5 to 24.9. Our BMI calculator shows the healthy weight range for your height instantly. For personalised guidance, speak to your GP.
Does 15.5 stone mean I have a health risk?
BMI is a screening tool but has limitations — it doesn't account for muscle mass or where fat is stored. Waist circumference is also important. A GP can assess your individual risk based on your full health picture, not BMI alone.
How can I convert 15.5 stone to pounds easily?
15.5 stone = 217 pounds exactly. One stone always equals 14 pounds, so multiply: 15.5 × 14 = 217 lbs. Use our free weight converter to switch between kilogram to stone conversion and other units instantly.
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.