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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Is 99 Kg A Healthy Weight?
99 kg converts to 15 stone and 8 pounds — but whether this is a healthy weight depends entirely on your height. Using NHS guidelines, someone at 99 kg could be in a healthy range, overweight, or obese depending on their height and individual health factors. This guide shows you how to assess your personal weight status and what steps you can take if needed. Use our free BMI calculator above to check your exact position on the health spectrum.
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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.
Healthy Weight Ranges At Different Heights
At 99 kg, your health status depends on your height. Here's how this weight translates across three common heights using NHS BMI guidelines:
- At 5ft 4in (163 cm): BMI of 33.8 — this falls in the obese range (BMI 30+). A healthy weight would be 47–64 kg (7st 5lbs to 10st).
- At 5ft 10in (178 cm): BMI of 28.0 — this is in the overweight range (BMI 25–29.9). A healthy weight would be 59–79 kg (9st 4lbs to 12st 6lbs).
- At 6ft 2in (188 cm): BMI of 26.5 — this is in the overweight range but closer to healthy. A healthy weight would be 65–88 kg (10st 3lbs to 13st 11lbs).
To convert kilograms to stone accurately, divide your weight by 6.35029. For precise health context, use our weight converter and BMI calculator above to check your personal measurement.
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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: When 99 Kg Requires Action
The NHS recommends a healthy BMI between 18.5 and 24.9. If your BMI at 99 kg is above 25, lifestyle changes are recommended. These include a reduced-calorie diet, regular physical activity, and behaviour change support. For adults of South Asian, Chinese, Black African, or Black Caribbean backgrounds, lower BMI thresholds apply — healthy weight starts at BMI 18.5–22.9.
Waist measurement also matters: for men, a waist over 94 cm signals increased health risk; for women, over 80 cm. If you're concerned about your weight or health, speak to your GP. They can assess your individual circumstances and suggest appropriate support, from weight loss programmes to specialist referral if needed.
- 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.
What is 99 kg in stone and pounds exactly?
99 kg equals 15 stone and 8 pounds (15st 8lbs). To convert kilograms to stone, divide by 6.35029. To convert to pounds, multiply by 2.20462, giving 218.3 lbs total.
Is 99 kg overweight or obese?
It depends on your height. At 5ft 10in it's overweight; at 5ft 4in it's obese. Use our free BMI calculator above to find your exact BMI — it will tell you where 99 kg sits for your specific height.
What's a healthy weight if I'm 99 kg right now?
For most adults, healthy weight is a BMI of 18.5–24.9. At 5ft 10in, that's 59–79 kg. At 6ft, it's 65–88 kg. Your GP can give personalised advice, and our weight converter helps compare your current weight to these ranges.
What should I do if 99 kg puts me in the overweight range?
The NHS recommends a gradual approach: aim for 0.5–1 kg loss per week through a balanced diet and increased activity. Your GP can refer you to weight management programmes. Track progress using our free progress tracker.
Do waist measurements matter as well as weight?
Yes. The NHS recommends waist circumference checks alongside weight. For men, over 94 cm is increased risk; over 102 cm is high risk. For women, over 80 cm is increased risk; over 88 cm is high risk. These measurements predict health risk better than weight alone.
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.