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 19 Stone 10 Pounds in Kilograms?
19 stone 10 pounds is equivalent to 125 kg (or 125.2 kg to be precise). This conversion is straightforward using the standard UK to metric conversion formula. Understanding your weight in both imperial and metric measurements is useful for NHS health appointments, health calculators, and comparing your weight against NHS guidance. Use our free weight converter above to switch between stone, pounds, and kilograms instantly whenever you need to. Whether you're tracking your health or preparing for a GP appointment, having both measurements on hand is practical and helpful.
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.
NHS Weight Guidance and Health Context
At 125 kg, it's helpful to understand what this means for your health according to NHS guidance. Your BMI (Body Mass Index) depends on your height—use our free BMI calculator on this page to find your personal BMI in seconds. According to NHS guidelines, a healthy BMI range is 18.5 to 24.9 for most UK adults. At 125 kg, adults of average height (around 5ft 6in to 5ft 9in) would typically fall into the obese category, which starts at BMI 30. This doesn't mean you're unhealthy right now, but it does indicate that weight-related health risks may increase.
- For South Asian, Chinese, Black African, or Black Caribbean adults, NHS recommends lower BMI thresholds—your GP can advise on what's right for you
- Even a modest weight loss of 5-10% of body weight can improve blood pressure, blood sugar control, and reduce joint strain
- Your GP can assess your individual health and discuss weight management options if appropriate
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 Between UK and Metric Measurements
UK adults commonly use stone and pounds, but NHS health records and many health tools use kilograms. The conversion is simple: 1 stone = 6.35 kg, and 1 pound = 0.454 kg. So 19 stone 10 pounds breaks down as (19 × 6.35) + (10 × 0.454) = 125.2 kg. Our free weight converter above handles this instantly, so you don't need to calculate manually.
- Having both measurements available helps with NHS consultations and online health calculators
- Many weight management programmes and health apps work in metric, so conversion is useful
- Your GP can discuss healthy weight ranges specific to your height, age, and health conditions
- 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 125 kg (19 stone 10 pounds) overweight according to NHS?
Whether 125 kg is overweight depends on your height. Your BMI (weight in relation to height) determines this. Use our BMI calculator above with your height to find out. Most adults at 125 kg will have a BMI in the overweight or obese range, but only your personal BMI tells the full story. Your GP can give you personalised health advice.
How do I convert 19 stone 10 pounds to kg?
19 stone 10 pounds equals 125 kg. The formula is: (19 × 6.35) + (10 × 0.454) = 125.2 kg. Our weight converter above does this instantly—just enter your weight in stone and pounds, and it shows the metric equivalent immediately.
What is a healthy weight range in kg for UK adults?
A healthy weight depends on your height and individual health factors. For most UK adults, a BMI between 18.5 and 24.9 is considered healthy. This translates to different kg ranges depending on height—for example, a 5ft 6in adult should aim for 52-70 kg. Your GP can advise on the right weight for your health. Use our BMI calculator to find your healthy weight range.
Can I use this weight information to track my progress?
Yes. Our free progress tracker allows you to log your weight in either stone or kilograms and monitor changes over time. Tracking consistently—weekly or monthly—helps you see trends and stay motivated. Small, sustainable changes are more likely to last than gradual weight management.
Should I be concerned about my weight if I'm at 125 kg?
Weight is just one health indicator. Your BMI, waist circumference, blood pressure, and blood sugar are all important too. If you're concerned about your health, speak to your GP. They can assess your individual risk factors and discuss whether weight management would benefit you, and what support options are available through NHS services.
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.