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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126kg in Stone and Pounds — Is This a Healthy Weight?
126kg converts to 19 stone and 13 pounds (or approximately 19st 13lbs) — but whether this is a healthy weight entirely depends on your height. A person who is 5ft 10in tall at 126kg would be overweight according to NHS guidelines, while someone 6ft 3in tall at the same weight might fall within a healthy BMI range. To understand what 126kg means for your personal health, you need to factor in your height. Use our free BMI calculator above to check your individual position, and we'll explain the healthy weight ranges for different heights below.
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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
Whether 126kg is healthy depends entirely on your height. The NHS uses BMI (body mass index) as a screening tool, where a healthy BMI sits between 18.5 and 24.9. At 126kg, your healthy weight status varies significantly:
- At 5ft 8in (173cm): 126kg gives a BMI of 42.1 — in the severely obese category. Healthy range for this height is 56–76kg.
- At 5ft 11in (180cm): 126kg gives a BMI of 37.8 — obese category. Healthy range is 60–81kg.
- At 6ft 2in (188cm): 126kg gives a BMI of 35.6 — obese category. Healthy range is 65–88kg.
To convert your weight accurately between kg and stone, and to see where you fall on the healthy weight scale, use the weight converter on this page alongside the BMI calculator to get your instant personal assessment.
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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 and What To Do Next
If your weight is outside the healthy range for your height, the NHS recommends starting with small, sustainable changes rather than gradual weight management. Aim for losing 0.5–1kg per week through a combination of reduced-calorie eating and increased physical activity. Your waist circumference also matters — the NHS advises that waist should stay under 94cm (37 inches) for men and 80cm (31.5 inches) for women to reduce health risks. If you're finding weight management challenging, speak to your GP, who can discuss tailored options including referral to specialist weight management services or discussing weight loss support. Remember, weight is affected by many factors including genetics, medications, and medical conditions — a GP can help you understand your individual situation without judgment.
- 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 126kg in stone and pounds?
126kg converts to 19 stone and 13 pounds (19st 13lbs). To convert kilograms to stone, divide by 6.35. For pounds, multiply kg by 2.20462. Use our free weight converter above to switch between units instantly.
Is 126kg overweight?
Whether 126kg is overweight depends on your height. At 5ft 10in (178cm), 126kg gives a BMI of 40.2 (obese range). At 6ft 2in (188cm), it's 35.6 (also obese). Use our BMI calculator above with your actual height to check your personal category.
What is the healthy weight range for someone 5ft 10in tall?
For an adult 5ft 10in (178cm) tall, the NHS healthy weight range is approximately 57–77kg. This gives a BMI between 18.5 and 24.9. If you're currently above this range, even a 5–clinically studied weight loss can improve health markers like blood pressure and blood sugar.
Should I be concerned about my weight at 126kg?
If 126kg puts you in the overweight or obese BMI category for your height, speaking to your GP is a good first step. They can assess your individual health, discuss lifestyle changes, and if appropriate, refer you to specialist weight management services. Weight loss doesn't have to happen overnight.
Where can I find support for weight management?
Start with your GP, who can discuss NHS weight management services in your area, lifestyle support, and whether prescription options might be suitable. The NHS also offers online tools, apps, and community programmes. Our free progress tracker can help you log changes over time as you work towards your goals.
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.