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 104kg in Stone?
104kg is equivalent to 16 stone and 5 pounds (16st 5lbs) in UK measurements. At this weight, understanding your personal health context is important. The NHS provides evidence-based guidance on healthy weight ranges, and factors like height, age, and overall fitness all play a role in determining what weight is right for you. Use our free weight converter above to switch between kg, stone, and pounds instantly, and our BMI calculator to see how your weight sits against NHS health guidelines for your height.
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.
104kg BMI and Health Context
At 104kg, your health picture depends largely on your height and body composition. Using the BMI calculator on this page, you can instantly see whether 104kg falls into the healthy weight, overweight, or obese category for your specific height. For example, at 1.75m (5ft 9in), 104kg gives a BMI of approximately 34, which falls into the obese (Class I) category according to NHS guidelines. However, BMI is a screening tool with limitations — it doesn't distinguish between muscle and fat. The NHS also recommends checking your waist circumference: for men, over 94cm signals increased health risk; for women, over 80cm. If you're concerned about your health, your GP can provide personalised advice about your individual risk factors.
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.
UK Health Resources and Next Steps
The NHS weight management pathway begins with your GP, who can assess your overall health and discuss options if you're concerned about your weight. Free resources available in the UK include the NHS Weight Loss Plan, community weight management programmes, and your local integrated care board's specialist weight management services. For ongoing support, try our free progress tracker to log your health journey. If you're interested in prescription weight loss options, your GP can refer you to specialist tier 3 weight management services in your area. Remember, sustainable weight management combines realistic goals, balanced nutrition, and regular physical activity.
- 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 104kg overweight or obese?
Whether 104kg is overweight or obese depends on your height. Use our free BMI calculator above to check your personal BMI. For example, at 1.75m (5ft 9in), 104kg gives a BMI of 34 (obese Class I); at 1.85m (6ft 1in), the same weight gives a BMI of 30.4 (obese Class I). Your height determines your category according to NHS guidelines.
How do I convert 104kg to stone and pounds?
104kg equals 16 stone and 5 pounds (16st 5lbs) exactly. To convert: divide 104 by 6.35029 to get 16.38 stone, which is 16 stone plus (0.38 × 14) = 5.3 pounds. Use our free weight converter on this page for instant conversions between kg, stone, and lbs.
What's a healthy weight for me at 104kg?
A healthy weight depends on your height, age, sex, and muscle mass. The NHS healthy BMI range is 18.5 to 24.9. If you're at 1.75m, a healthy weight would be approximately 56–76kg. Consult your GP for personalised advice about what a healthy weight looks like for your individual circumstances.
Should I be concerned about my health at 104kg?
This depends on your height, fitness level, and other health factors. Your GP can assess your individual health risk. The NHS recommends checking not just weight but also waist circumference and discussing any health concerns like blood pressure, blood sugar, or family history with your GP.
What weight loss options are available in the UK?
The NHS offers a tiered weight management pathway starting with your GP. Options include the free NHS Weight Loss Plan, community programmes, specialist weight management services (tier 3), and in some cases prescription weight loss medications. Your GP can discuss which option suits you best.
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.