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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What is 99.5 kg in stone?
99.5 kg is equal to 15 stone and 9.2 pounds (or 15st 9lbs in UK measurements). To convert kilograms to stone, divide the weight by 6.35029. At this weight, your health context depends on your height — use our free weight converter above to see the exact conversion, then check your BMI using our free BMI calculator to understand where you fall on NHS weight categories. This weight falls into the overweight or obese range for most UK adults, depending on height.
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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.
Conversion Table: 99.5 kg and Nearby Values
Here is a quick reference table showing 99.5 kg in stone alongside nearby kilogram values and their stone and pounds equivalents:
- 95 kg = 14st 13lbs
- 97 kg = 15st 4lbs
- 99.5 kg = 15st 9.2lbs
- 102 kg = 16st 1lbs
- 105 kg = 16st 8lbs
The kg to stone conversion formula is: weight in kg ÷ 6.35029 = stone. For example, 99.5 ÷ 6.35029 = 15.66 stone. To break this into stone and pounds, multiply the decimal by 14: 0.66 × 14 = 9.2 pounds. This makes 99.5 kg equal to 15 stone 9.2 pounds exactly. Our free weight converter makes this calculation instant for any weight in metric or imperial units.
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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.
BMI and Health Context at 99.5 kg
At 99.5 kg, your BMI depends entirely on your height. For example, at an average UK adult height of 1.70 m (5ft 7in), a weight of 99.5 kg gives a BMI of approximately 34.4, which falls into the obese (Class I) category according to NHS guidelines. At 1.75 m (5ft 9in), the BMI would be 32.5 (still obese). At 1.80 m (5ft 11in), it would be 30.7 (still obese). If you are of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds, and you may benefit from speaking to your GP about weight management options. Use our BMI calculator above to find your personal BMI and healthy weight range at your exact 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 99.5 kg to stone manually?
Divide 99.5 by 6.35029 to get stone (15.66 stone). To convert the decimal to pounds, multiply 0.66 by 14, which equals 9.2 pounds. So 99.5 kg = 15 stone 9.2 pounds. Use our free weight converter above for instant conversions at any weight.
Is 99.5 kg a healthy weight?
This depends on your height and ethnicity. At most UK adult heights, 99.5 kg falls into the overweight or obese range according to NHS guidelines. Your GP can assess whether this weight is healthy for you personally. Use our free BMI calculator above to check your BMI at your height and understand your NHS weight category.
What is the healthy weight range at 99.5 kg height equivalent?
If you are 1.70 m tall (the weight at which 99.5 kg gives BMI 34.4), the NHS healthy weight range is approximately 53–72 kg (8st 5lbs to 11st 4lbs). If you are taller or shorter, your healthy range will differ. Calculate your personal healthy weight range using our free BMI calculator.
How much weight would I need to lose from 99.5 kg to reach a healthy BMI?
To reach a healthy BMI of 24.9, the amount you'd need to lose varies by height. At 1.70 m, you'd aim for around 72 kg, meaning a loss of about 27.5 kg. At 1.80 m, a healthy weight is around 81 kg, meaning a loss of about 18.5 kg. Speak to your GP about safe, sustainable weight loss. Our progress tracker can help you log weight loss over time.
Should I consider weight loss treatment at 99.5 kg?
At 99.5 kg (BMI typically 30+), you may be eligible for prescription weight loss support through NHS specialist services or private prescribing. Your GP can assess your individual health and refer you to appropriate support. Eligibility is based on BMI, health conditions, and other factors. Always discuss options with a healthcare professional.
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.