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 pounds (15st 8lbs). To convert kilograms to stone using the standard kg to stone conversion, divide your weight in kilograms by 6.35029. At this weight, your health context depends on your height — use our free BMI calculator above to check where you fall on the NHS weight categories. This weight places most adults into the overweight or obese range, though individual health outcomes vary based on muscle mass, body composition, and other factors. Our free weight converter can help you switch between metric and imperial measurements instantly.
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.
99 Kg to Stone Conversion Table & Formula
99 kg = 15 stone 8 lbs (15st 8lbs)
Use this formula to convert any kilogram weight to stone: divide kilograms by 6.35029. For 99kg: 99 ÷ 6.35029 = 15.6 stone. To express this as stone and pounds, multiply the decimal (0.6) by 14 pounds per stone: 0.6 × 14 = 8.4 lbs.
Nearby conversion values:
- 95 kg = 14st 13lbs
- 96 kg = 15st 1lb
- 97 kg = 15st 4lbs
- 98 kg = 15st 6lbs
- 99 kg = 15st 8lbs
- 100 kg = 15st 10lbs
- 101 kg = 15st 12lbs
- 102 kg = 16st 0lbs
- 103 kg = 16st 2lbs
- 104 kg = 16st 5lbs
Stone and pounds is the traditional UK measurement for body weight. Our weight converter on this page lets you switch between kg, stone, and pounds instantly.
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 & Healthy Weight Context
At 99 kg, your BMI depends entirely on your height. For example, an adult who is 1.75m (5ft 9in) tall would have a BMI of approximately 32.2, placing them in the obese category according to NHS guidelines. An adult who is 1.85m (6ft 1in) tall would have a BMI of approximately 28.9, in the overweight category. Calculate your personal BMI using the free BMI calculator on this page to understand your individual health context. Even modest weight loss of 5–10% of body weight — approximately 5–10 kg — can meaningfully improve cardiovascular health, blood pressure, and blood sugar control.
- 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 and pounds?
Divide 99 by 6.35029 to get 15.6 stone. Then multiply the decimal portion (0.6) by 14 to get the pounds: 0.6 × 14 = 8 pounds. So 99 kg = 15 stone 8 pounds. Use the weight converter on this page for instant conversions.
What is the BMI at 99 kg for someone 5ft 9in tall?
At 99 kg and 1.75m (5ft 9in), your BMI is approximately 32.2, which falls in the obese category according to NHS guidelines. This suggests increased health risk for cardiovascular disease, type 2 diabetes, and joint problems. Use our free BMI calculator to check your personal BMI and get NHS-aligned guidance.
Is 99 kg overweight or obese?
At 99 kg, whether you're overweight or obese depends on your height. Most adults at this weight fall into the obese category, but someone very tall (over 6ft 2in) might be in the overweight range. Your GP can provide personalised guidance about what 99 kg means for your individual health.
What is a healthy weight if I'm currently 99 kg?
A healthy weight depends on your height and body composition. For most adults, the NHS healthy weight range is a BMI of 18.5–24.9. Use our free BMI calculator to find the healthy weight range for your specific height. Weight loss of 5–10 kg can improve health outcomes significantly.
How much weight would I need to lose from 99 kg to reach a healthy BMI?
This depends on your height. For someone 5ft 9in tall, reaching a healthy BMI (below 25) would require losing approximately 20–25 kg to reach around 75 kg. For someone taller, less loss may be needed. Our GLP-1 weight loss calculator can help project realistic weight loss timelines if you're considering medical support.
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.