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 99 Kg in Stone?
99 kilograms is equal to 15 stone and 8.1 pounds (or 15st 8lbs). To convert kilograms to stone, divide the kilogram value by 6.35029. At 99 kg, most UK adults would fall into the overweight or obese category depending on height, which is why understanding how your weight relates to your health is important. Use our free BMI calculator above to check your personal BMI and see where you fall on the NHS health ranges. This conversion guide also includes nearby weight values and practical health context to help you understand your weight in UK measurements.
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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.
99 Kg to Stone Conversion Table & Formula
99 kg = 15 stone 8.1 lbs (or 15st 8lbs)
To use the kilogram to stone conversion formula, divide your weight in kg by 6.35029. For 99 kg: 99 ÷ 6.35029 = 15.6 stone. To express this as stone and pounds, multiply the decimal (0.6) by 14 (the number of pounds in one stone): 0.6 × 14 = 8.4 pounds.
Quick reference table for nearby weights:
- 95 kg = 14st 13.6lbs
- 96 kg = 15st 1.4lbs
- 97 kg = 15st 3.2lbs
- 98 kg = 15st 5.1lbs
- 99 kg = 15st 8.1lbs
- 100 kg = 15st 10lbs
- 101 kg = 15st 11.8lbs
- 102 kg = 16st 0.7lbs
- 103 kg = 16st 2.5lbs
- 104 kg = 16st 4.3lbs
Our free weight converter above lets you convert between kg, stone, and pounds instantly for any weight value.
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.
99 Kg: BMI Context & Healthy Weight Range
At 99 kg, your BMI depends on your height. For example, at 5ft 8in (173 cm), a weight of 99 kg gives a BMI of 33.1, which falls into the obese category (BMI 30.0–34.9) according to NHS guidelines. At 5ft 10in (178 cm), the same 99 kg weight results in a BMI of 30.6. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds apply, meaning health risks increase at lower weights.
A healthy weight range at these heights would be approximately 60–75 kg. Even a modest weight loss of 5–10% of your current weight (5–10 kg) can improve blood pressure, blood sugar control, and reduce joint strain. Your GP can provide personalised guidance on whether weight loss is appropriate for you.
- 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 kg to stone manually?
Divide 99 by 6.35029 to get 15.6 stone. To convert the decimal to pounds, multiply 0.6 by 14 (pounds per stone), which gives 8.4 pounds. So 99 kg = 15 stone 8 pounds. You can also use our free weight converter tool above for instant conversions.
What is 99 kg in pounds only?
99 kg equals approximately 218.3 pounds. To convert any kilogram value to pounds, multiply by 2.20462. This is useful if you're comparing to American weight measurements, though in the UK we typically use stone and pounds together.
Is 99 kg overweight or obese?
At 99 kg, whether you're overweight or obese depends on your height. Use our BMI calculator above to enter your height and get your exact BMI category. Generally, 99 kg puts most adults into the overweight or obese range according to NHS guidelines, though the threshold varies by individual circumstances.
What is a healthy weight if I'm currently 99 kg?
A healthy weight depends on your height and build. At average UK heights (5ft 6in to 5ft 10in), a healthy weight range would typically be 55–75 kg. Your GP can advise on a realistic and healthy target weight for you, taking into account your overall health and fitness level.
Can prescription weight loss medication help at 99 kg?
Adults with a BMI of 30 or above may be eligible for prescription weight loss treatment such as GLP-1 injections. However, eligibility is assessed on an individual basis by a healthcare professional. Speak to your GP about whether you might benefit from specialist weight management support or medication.
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.