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 Does 100 Kg Mean for a Man's Health?
If you weigh 100 kg, understanding what this means for your health depends on your height, age, and overall fitness. At 100 kg, most men fall into the overweight or obese category according to NHS guidelines, though this varies significantly. In UK measurements, 100 kg equals approximately 15 stone 8 lbs. Your BMI at this weight will determine whether you're in a healthy range, overweight, or obese — and this matters for your long-term health. Use our free BMI calculator above to check your personal BMI instantly, and see where you stand compared to NHS healthy weight recommendations.
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.
BMI, Weight Category, and Health Context for 100 Kg
At 100 kg, your health category depends entirely on your height. For example, a man who is 5ft 10in (178 cm) tall with a weight of 100 kg would have a BMI of approximately 31.4, placing him in the obese (Class I) category. However, a man who is 6ft 2in (188 cm) tall at 100 kg would have a BMI of around 25.6, which falls within the healthy weight range.
- BMI 18.5–24.9: Healthy weight — lower disease risk
- BMI 25.0–29.9: Overweight — increased health risks begin
- BMI 30.0–34.9: Obese (Class I) — significantly increased health risks
- BMI 35.0+: Severe obesity — high risk for type 2 diabetes, heart disease, and other conditions
The NHS recommends using a BMI calculator to determine your personal category, as height makes a critical difference. Being overweight or obese increases the risk of type 2 diabetes, high blood pressure, cardiovascular disease, and certain cancers. However, even modest weight loss of 5–10% can reduce these risks significantly.
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.
Converting 100 Kg to UK Measurements and Healthy Weight Targets
100 kg = 15 stone 8 lbs (approximately 220.5 lbs). For a healthy weight reference, the NHS provides BMI-based targets. If you're 178 cm (5ft 10in) tall, a healthy weight range is approximately 58–74 kg (9st 2lbs to 11st 8lbs). If you're 188 cm (6ft 2in) tall, a healthy weight range is approximately 65–85 kg (10st 3lbs to 13st 5lbs). Use our free weight converter to switch between kg, stone, and lbs whenever you need. Weight loss at a sustainable rate of 0.5–1 kg per week, alongside dietary changes and increased physical activity, is the NHS-recommended approach. If you have weight-related health conditions like type 2 diabetes or high blood pressure, your GP may discuss prescription weight management options as part of a comprehensive health plan.
- 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.
Is 100 kg overweight or obese?
It depends on your height. At 100 kg, you could be in any category from healthy weight to obese. A man 6ft 2in at 100 kg is likely healthy weight (BMI ~25.6), while a man 5ft 6in at 100 kg would be obese (BMI ~36). Use our BMI calculator to check your personal category instantly.
What is 100 kg in stone and pounds?
100 kg equals 15 stone 8 lbs, or approximately 220.5 pounds. You can convert between kg, stone, and lbs anytime using our free weight converter tool on this page.
What is a healthy weight if I weigh 100 kg?
Healthy weight depends on height. For a 178 cm man, healthy weight is 58–74 kg. For a 188 cm man, it's 65–85 kg. Calculate your personal healthy weight range using our BMI calculator, which accounts for your exact height.
What are the health risks at 100 kg?
Health risks depend on your BMI category. Overweight and obese individuals face increased risk of type 2 diabetes, heart disease, high blood pressure, and certain cancers. However, losing even 5–10% of body weight can reduce these risks significantly.
How can I manage my weight if I'm 100 kg?
The NHS recommends a calorie deficit of approximately 500 kcal per day for sustainable loss of 0.5–1 kg per week. This combines dietary changes, increased physical activity, and behaviour change. If you have weight-related health conditions, your GP may discuss prescription weight management options. Track your progress using our free progress tracker.
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.