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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15.7 Stone in Kg — Instant Conversion
15.7 stone is equal to approximately 99.7 kilograms. This conversion uses the standard stone to kg formula where one stone equals 6.35029 kg. Whether you're tracking your weight for health reasons, comparing measurements, or understanding NHS health guidance, knowing your weight in kilograms helps you access the full range of health tools and clinical references available in the UK. Use our free weight converter above to switch between stone, pounds, and kilograms instantly whenever you need to.
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.
Stone to Kg Conversion Formula and Reference Table
To convert 15.7 stone to kilograms, multiply the stone value by 6.35029. This gives you 99.7 kg. The inverse calculation — converting kilograms to stone — involves dividing by 6.35029.
15.7 stone = 99.7 kg
Here are nearby values for quick reference when you're converting stone and pounds:
- 15.0 stone = 95.3 kg
- 15.2 stone = 96.5 kg
- 15.5 stone = 98.4 kg
- 15.7 stone = 99.7 kg
- 16.0 stone = 101.6 kg
- 16.2 stone = 102.8 kg
- 16.5 stone = 104.8 kg
For precise conversions between kilogram to stone conversion and back, the MyWeightCheck weight converter tool above makes the calculation instant.
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.
BMI and Health Context at 15.7 Stone
At 15.7 stone (99.7 kg), your BMI depends on your height. For example, at an average UK height of 1.73m (5ft 8in), a weight of 99.7 kg gives a BMI of approximately 33.3, which falls in the obese category according to NHS guidelines. At taller heights, the BMI would be lower; at shorter heights, it would be higher.
The NHS recommends a healthy weight range BMI of 18.5 to 24.9 for most adults. If you're concerned about your weight and health, speak with your GP about what your weight means for your individual circumstances. Our free BMI calculator above helps you understand your personal BMI based on your actual height.
- 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 15.7 stone to kilograms accurately?
Multiply 15.7 by 6.35029 to get 99.7 kg. This is the standard conversion factor used in the UK and clinically across the NHS. For quick conversions, use the weight converter tool on this page.
What is 15.7 stone in pounds?
15.7 stone equals 219.8 pounds (15.7 × 14 = 219.8 lbs). One stone always equals exactly 14 pounds, so converting between stone and pounds is straightforward multiplication or division.
Is 15.7 stone considered overweight or obese?
This depends on your height. At average UK adult height (5ft 8in / 1.73m), 15.7 stone gives a BMI of approximately 33.3, which is in the obese range. Your GP can advise on what your weight means for your individual health.
Why do UK adults use stone and pounds instead of kilograms?
Stone and pounds are traditional UK measurements still widely used for body weight. The NHS uses kilograms clinically, but most UK adults prefer stone. Both measurements are equally valid — it's about what feels familiar to you.
Can I use this conversion to check my healthy weight range?
Yes. Once you know your weight in kilograms, use our free BMI calculator to check where your weight falls against NHS healthy weight ranges for your height. This gives you personalised context for your health.
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.