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
15 Stone 7 In Kg — Convert To Kilograms
15 stone 7 pounds (15st 7lbs) converts to approximately 98.9 kg. If you're checking your weight in kilograms for health purposes, understanding how UK measurements translate to metric units is helpful for comparing your weight against NHS guidance and international health thresholds. Whether you're tracking progress with our free weight converter, preparing for a GP appointment, or simply curious about metric conversions, this guide provides the exact conversion plus important healthy weight context for UK adults.
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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.
How To Convert 15 Stone 7 To Kilograms
15 stone 7 pounds = 98.9 kg (exact conversion: 98.88 kg)
To convert stone and pounds to kilograms, use this formula: multiply the stone amount by 6.35029, then add the pounds multiplied by 0.453592.
For 15 stone 7:
- (15 × 6.35029) = 95.25 kg
- (7 × 0.453592) = 3.18 kg
- Total = 98.43 kg (or 98.9 kg rounded)
You can also use our free weight converter above to instantly switch between stone, pounds, and kilograms. This is especially useful when reviewing NHS health guidance, which often uses metric measurements, or when comparing your weight against international health standards.
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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.
Where Does 98.9kg Fall On The UK Health Scale?
At 98.9 kg, your weight category depends on your height. Using our free BMI calculator above, you can enter your exact height to find your personal BMI and see where you fall within NHS guidance. For example, at 173 cm (5ft 8in), a weight of 98.9 kg gives a BMI of approximately 33, which falls in the obese (Class I) category according to NHS thresholds.
The NHS healthy weight range for an adult varies by height — it's typically between 50–76 kg for average-height women and 65–90 kg for average-height men. Individual factors like muscle mass, body composition, and any weight-related health conditions also matter. Your GP can provide personalised advice about what your weight means for your individual 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 98.9kg a healthy weight?
A healthy weight depends on your height and individual health. Using the NHS BMI categories, 98.9kg may fall into overweight or obese categories depending on your height. Calculate your personal BMI using the free calculator on this page to see your individual result, then speak with your GP about what's healthy for you.
How do I convert stone and pounds to kg quickly?
Divide your stone by 0.157473 to get kg, or use our free weight converter above for gradual improvement. Alternatively, multiply stone by 6.35029 and add pounds multiplied by 0.453592. The converter tool is faster and removes calculation errors.
What's the healthy weight range at my height?
The healthy weight range varies by height. At 173cm (5ft 8in), healthy weight is roughly 55–74kg. Use our free BMI calculator above to enter your exact height and see your healthy weight range according to NHS guidelines, which accounts for your specific measurements.
Can I lose weight if I'm at 98.9kg?
Yes. The NHS recommends losing 0.5–1kg per week through a combination of reduced-calorie diet and increased physical activity. Even a 5–10% reduction in body weight can bring health benefits. Your GP can discuss sustainable weight loss approaches suited to your individual situation and health.
What if I need help with weight management?
Speak with your GP about weight management options. The NHS provides support through tier 1 self-help services and, if needed, specialist tier 3 services. If eligible, prescription weight management medications may be discussed as part of a comprehensive approach alongside lifestyle changes.
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.