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?
99 kilograms converts to 15 stones and 8 pounds (15st 8lbs) using the standard kg to stone conversion. However, whether this weight is healthy depends entirely on your height, age, and overall health. At shorter heights, 99kg may fall into the overweight or obese range according to NHS guidelines, whilst at taller heights it could be within a healthy weight. Use our free BMI calculator above to find out your personal BMI and whether 99kg is healthy for you specifically.
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.
Healthy Weight Ranges By Height — Is 99kg Right For You?
Whether 99kg (15st 8lbs) is a healthy weight depends on your height. The NHS uses BMI to define healthy weight ranges, calculated as weight (kg) divided by height (m) squared. Here are three practical examples showing how 99kg falls at different heights:
- At 160cm (5ft 3in): 99kg gives a BMI of 38.7 — this is obese (Class II) according to NHS guidelines
- At 175cm (5ft 9in): 99kg gives a BMI of 32.3 — obese (Class I) — though close to overweight at this height
- At 190cm (6ft 3in): 99kg gives a BMI of 27.4 — overweight but not obese
A healthy BMI is between 18.5 and 24.9 for most UK adults. For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS recommends lower thresholds (18.5 to 22.9). To convert 99 kilograms to your personal health context, calculate your BMI using the tool on this page — it's the most accurate way to assess whether this weight is healthy for your individual height and build.
Clinically BackedWeight Loss
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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.
NHS Guidance: What To Do If You're Outside The Healthy Range
If your BMI at 99kg falls outside the healthy weight range, NHS guidance recommends a supportive approach. Weight is influenced by genetics, medical conditions, medications, and lifestyle — there's never a single "right" weight. The NHS suggests aiming for gradual, sustainable weight loss of 0.5–1kg per week if you choose to lose weight, combining a modest calorie deficit with increased physical activity. Your GP can discuss whether weight management is appropriate for you and what support is available, including referral to specialist services. Remember, even a 5–10% reduction in body weight brings real health benefits. You can track your progress using our free progress tracker.
- 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?
Divide 99kg by 6.35029 to get stones (15.56 stones), then multiply the decimal by 14 to get pounds (7.84lbs), giving 15st 8lbs. Or use our free weight converter on this page for instant conversion between kg, stone, and pounds.
Is 99kg overweight or obese?
This depends on your height. At 175cm, 99kg is obese (BMI 32.3). At 190cm, it's overweight (BMI 27.4). Use the BMI calculator above to check your personal BMI — it gives a clear answer based on your exact height.
What's the healthy weight range for someone 99kg?
If you're 99kg, a healthy weight range depends on your height and the NHS healthy BMI of 18.5–24.9. Use our BMI calculator to find the healthy weight range for your specific height in both kg and stone.
How much weight would I need to lose from 99kg to be healthy?
Again, this depends on your height. At 175cm, you'd need to reach roughly 75kg (11st 10lbs) for a healthy BMI. At 160cm, roughly 64kg (10st 1lbs). Your GP can advise what's realistic and healthy for you individually.
What does waist measurement tell me if I weigh 99kg?
Waist circumference matters as much as BMI. The NHS flags increased health risk at 94cm (37in) for men and 80cm (31.5in) for women. Ask your GP to measure your waist — it predicts health risk independent of weight.
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.