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 Is 15.6 Stone In Pounds And BMI?
15.6 stone equals 218 pounds (or 98.8 kg). Your BMI at this weight depends entirely on your height — the same weight gives different BMI values for different people. Use our free BMI calculator above to find your exact BMI, then check where it falls within NHS weight categories. This guide shows you what this weight means for your health across common UK heights.
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.
15.6 Stone in Pounds — BMI at Different Heights
15.6 stone converts to 218 pounds or 98.8 kg using standard kg to stone conversion formulas. Your BMI at this weight varies significantly by height. Use the weight converter on this page to confirm the exact conversion, then try our free BMI calculator to find your personal BMI:
- At 5ft 4in (163cm): BMI approximately 37.4 — falls in the obese (Class II) category
- At 5ft 8in (173cm): BMI approximately 32.2 — falls in the obese (Class I) category
- At 5ft 10in (178cm): BMI approximately 29.8 — falls in the overweight category
- At 6ft 0in (183cm): BMI approximately 27.4 — falls in the overweight category
- At 6ft 2in (188cm): BMI approximately 25.5 — falls in the healthy weight range
These BMI values are approximate and based on UK NHS guidelines. Individual health also depends on factors like muscle mass, where fat is stored, and existing health conditions.
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.
Understanding BMI Categories and Health Context
The NHS categorises adult BMI into five ranges: healthy weight (18.5–24.9), overweight (25.0–29.9), obese Class I (30.0–34.9), obese Class II (35.0–39.9), and severely obese (40.0+). At 15.6 stone, your BMI category depends on your height — which is why BMI is calculated individually, not assumed. If you're from a South Asian, Chinese, Black African, or Black Caribbean background, the NHS recommends lower BMI thresholds due to higher health risks at the same weight. Your GP can provide personalised health advice based on your individual circumstances, not BMI alone.
- 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.
How do I convert 15.6 stone to kilograms?
15.6 stone equals 98.8 kg. Use the standard stone to kg conversion formula: multiply stone by 6.35029. Try our free weight converter above to convert between stone, pounds, and kilograms instantly.
Is 15.6 stone (218 lbs) overweight or obese?
It depends on your height. At 5ft 8in, 15.6 stone gives a BMI of approximately 32, which is obese (Class I). At 6ft 2in, the same weight gives a BMI of about 25.5, which is healthy weight. Use our free BMI calculator to find your exact category.
What is the healthy weight range for my height if I weigh 15.6 stone?
Healthy weight depends on your height. At 5ft 8in, healthy weight is approximately 8st 4lbs to 11st 3lbs (52–71 kg). At 6ft 0in, it's about 9st 4lbs to 12st 7lbs (59–79 kg). Your GP can advise on a healthy weight range for you personally.
Can BMI alone tell me if my weight is healthy?
No. BMI is a useful screening tool but has limitations — it doesn't account for muscle mass, where fat is stored, or existing health conditions. The NHS recommends also measuring waist circumference (over 94cm in men or 80cm in women indicates increased health risk). Your GP can give you personalised health advice.
Why does the same weight give different BMI values at different heights?
BMI accounts for how weight is distributed relative to height. The same weight on a taller person is spread over a larger body surface, resulting in a lower BMI. This is why BMI is always calculated individually based on both weight and height together.
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.