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 10 in Kg — Quick Conversion & UK Health Context
15 stone 10 pounds is equivalent to approximately 99.8 kilograms. Whether you're tracking your weight for health reasons, comparing UK and metric measurements, or checking where you sit on NHS health guidance, understanding this conversion is straightforward. This guide explains the conversion, provides health context using UK norms, and shows you how to use our free weight converter to check your personal health metrics instantly.
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.
How to Convert 15 Stone 10 to Kilograms
The conversion from stone and pounds to kilograms uses a standard formula. One stone equals exactly 6.35029 kilograms, and one pound equals 0.453592 kilograms. To convert 15 stone 10 pounds: multiply 15 by 6.35029 (which equals 95.25435 kg), then add 10 pounds converted to kilograms (10 × 0.453592 = 4.53592 kg). The total is approximately 99.8 kg.
This weight sits in the obese category (Class I) according to NHS BMI guidelines for most adults. However, BMI context matters — at different heights, 99.8 kg can represent different health profiles. For example, at 6 feet tall (183 cm), a BMI of 99.8 kg is approximately 29.8 (overweight), whilst at 5 feet 6 inches (168 cm), it's approximately 32.2 (obese Class I). Our free weight converter and BMI calculator above let you check your exact BMI instantly using your personal height.
- 15 stone 10 lbs = 99.8 kg
- Metric equivalent: 99,800 grams
- Approximate body weight category: depends on height and body composition
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.
NHS Health Guidance for This Weight Range
The NHS recommends that adults maintain a BMI between 18.5 and 24.9 for optimal health, though ethnicity-adjusted thresholds apply for South Asian, Chinese, Black African, and Black Caribbean adults. At 99.8 kg, your health risk profile depends on your height, age, and any existing medical conditions. If you fall into the overweight or obese category, the NHS encourages gradual, sustainable weight loss of approximately 0.5 to 1 kg per week, combined with dietary changes and increased physical activity.
If you're concerned about your weight and health, your GP can provide personalised guidance. Even modest weight loss of 5–10% of body weight can deliver meaningful health benefits, including improved blood pressure, better blood sugar control, and reduced joint strain. Use the BMI calculator on this page to determine your personal health category, then speak with your GP about appropriate next steps for your situation.
- 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 99.8 kg overweight or obese?
That depends on your height. At 99.8 kg, if you're 5ft 10in (178 cm) tall, your BMI is approximately 30.2 (obese Class I). If you're 6ft 1in (185 cm), your BMI is approximately 27.5 (overweight). Use our free BMI calculator above with your height to see your exact category according to NHS guidelines.
How do I convert stone and pounds to kg accurately?
Multiply the stone by 6.35029, then add the pounds multiplied by 0.453592. For 15 stone 10: (15 × 6.35029) + (10 × 0.453592) = 99.8 kg. Our free weight converter above does this instantly — just enter your weight and select your units.
What does the NHS recommend for weight management at this weight?
The NHS recommends sustainable weight loss of 0.5–1 kg per week through a combination of reduced-calorie diet and increased physical activity. Even losing 5% of your body weight can improve blood pressure, blood sugar control, and overall health. Speak with your GP about a personalised plan suitable for your circumstances.
Why does my BMI matter if I weigh 99.8 kg?
BMI is a useful screening tool that combines weight and height to assess health risk. At 99.8 kg, your BMI category (overweight, obese, etc.) depends on your height. BMI has limitations — it doesn't account for muscle mass — but it's a helpful starting point. Your GP can provide fuller health context.
Where can I get support for weight management in the UK?
Start with your GP, who can refer you to NHS Tier 1 weight management services (digital tools and community programmes) or Tier 2 services (primary care-based support). For specialist medication-based weight loss treatment, your GP may refer you to a Tier 3 specialist weight management service, though waiting times and availability vary by region.
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.