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 99kg In Stone?
99kg converts to 15 stone and 8.2 pounds (or approximately 15 stone 8lbs) using the standard UK conversion rate. In kilograms, this is a weight that many UK adults experience at different life stages. Whether you're tracking your weight for health reasons, comparing measurements, or simply curious about the UK conversion, understanding how weight translates between metric and imperial measurements is helpful. Use our free weight converter above to switch between kg, stone, and pounds 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.
Is 99kg A Healthy Weight In The UK?
Whether 99kg is a healthy weight depends entirely on your height, age, and individual health profile. According to NHS guidelines, a healthy weight range is determined by your BMI (body mass index). At 99kg, your BMI will fall into different categories depending on your height:
- At 5ft 6in (168cm): BMI of approximately 32 — falls in the obese range (BMI 30–34.9)
- At 5ft 10in (178cm): BMI of approximately 28.4 — falls in the overweight range (BMI 25–29.9)
- At 6ft 0in (183cm): BMI of approximately 26.7 — falls in the overweight range
The NHS recommends a BMI of 18.5 to 24.9 for adults. Calculate your personal BMI using our free BMI calculator on this page to see where your weight sits relative to NHS healthy weight guidance.
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 Weight Management
If you're at 99kg and concerned about your health, the NHS recommends starting with your GP, who can assess your individual circumstances. Weight management support in the UK is available through a tiered system: tier 1 (self-help and digital tools like the ones on MyWeightCheck), tier 2 (primary care behavioural support), and tier 3 (specialist weight management services). Your GP can refer you to appropriate services based on your health needs. Even losing 5–10% of your body weight can bring meaningful health benefits, including improved blood pressure, better blood sugar control, and reduced joint strain.
- 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 99kg to stone and pounds?
Divide 99 by 6.35029 to get stone: 99 ÷ 6.35029 = 15.6 stone. This equals 15 stone and 8.2 pounds. You can instantly convert any weight using the free weight converter on this page.
Is 99kg overweight or obese according to NHS guidance?
It depends on your height. At 99kg, someone who is 5ft 6in would have a BMI of 32 (obese), while someone 6ft tall would have a BMI of 26.7 (overweight). Use our free BMI calculator to find your personal BMI and NHS category.
What's the healthy weight range for someone who currently weighs 99kg?
A healthy BMI is 18.5–24.9 according to NHS guidelines. For a person 5ft 8in tall, the healthy range is approximately 55–74kg. For 5ft 10in, it's 58–79kg. Your GP can give personalised guidance on a realistic target weight for you.
Can I get weight loss support through the NHS if I weigh 99kg?
Yes. Contact your GP, who can assess your health and refer you to weight management services if appropriate. The NHS offers tiered support including behavioural programmes and, for eligible patients, specialist services. Availability varies by region.
How quickly can I lose weight from 99kg?
The NHS recommends losing 0.5–1kg (1–2lbs) per week for sustainable results. This typically requires a calorie deficit of around 500 kcal daily, achieved through diet and physical activity changes. Always consult your GP before starting any weight loss programme. ```
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.