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 kg in stones and pounds? BMI explained
99 kilograms is approximately 15 stone 8 pounds (15st 8lbs). However, whether this weight is healthy depends entirely on your height. A weight of 99kg could fall anywhere from overweight to obese according to NHS guidelines, depending on how tall you are. This guide shows you what BMI this weight gives at common UK heights and what it means for your health.
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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.
99 kg BMI at different heights
To calculate your BMI at 99kg, we need to know your height. Here's what 99 kilograms to stone converts to at common heights using the standard kg to stone conversion:
- At 160cm (5ft 3in): BMI 38.7 — Obese (Class II)
- At 165cm (5ft 5in): BMI 36.3 — Obese (Class II)
- At 170cm (5ft 7in): BMI 34.2 — Obese (Class I)
- At 175cm (5ft 9in): BMI 32.2 — Obese (Class I)
- At 180cm (5ft 11in): BMI 30.5 — Obese (Class I)
- At 185cm (6ft 1in): BMI 28.9 — Overweight
Use our free BMI calculator above to find your exact BMI at 99kg with your personal height. Even small height differences change the BMI category significantly.
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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.
Understanding BMI categories and health context
According to NHS guidelines, a BMI of 30 or above is classified as obese, whilst 25–29.9 is overweight. At 99kg, most adults would fall into an obese category unless they are quite tall. However, BMI has important limitations — it doesn't distinguish between muscle and fat, so athletes or very muscular individuals may have a high BMI despite being healthy. Waist circumference is equally important: men should aim for under 94cm (37 inches), and women under 80cm (31.5 inches). Your GP can provide personalised advice about what this 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.
How do I convert 99kg to stones and pounds?
99kg equals approximately 15 stone 8 pounds. To convert kilograms to stone manually, divide 99 by 6.35 (which equals 15.59 stone). The decimal converts to pounds: 0.59 × 14 = 8.2 pounds. Use the weight converter on this page for instant conversions between metric and imperial weight measurements.
Is 99kg a healthy weight?
It depends on your height. At 99kg, most people would have a BMI over 30 (obese category). However, if you're 185cm (6ft 1in) or taller, you might fall into the overweight category instead. Use our free BMI calculator to check your personal BMI and NHS category. Your GP can advise on what's healthy for you specifically.
What BMI should I aim for?
The NHS recommends a BMI between 18.5 and 24.9 for healthy weight. However, for adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the recommended range is 18.5–22.9 due to higher health risks at lower BMIs. Remember, BMI is just one health indicator — your GP can discuss overall health in context.
What is 99kg in pounds?
99 kilograms equals approximately 218 pounds (218 lbs). This is useful for reference, though the NHS and UK health services primarily use kilograms for clinical measurements whilst many UK adults prefer stone and pounds for personal weight tracking.
At what weight would 99kg be a healthy BMI?
For someone to have a healthy BMI (18.5–24.9) at 99kg, they would need to be extremely tall—approximately 200cm (6ft 7in) or taller. Most people would need to weigh considerably less. Your GP can discuss realistic and sustainable weight management options suited to your individual circumstances and health goals.
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.