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
57.2 Kg in Lbs — What's a Healthy Weight?
57.2 kilograms is equivalent to 126.1 pounds (or 9 stone 0.1 lbs in UK measurements). Whether this weight is healthy depends entirely on your height and individual circumstances. The same weight can be perfectly healthy for one person and overweight for another. Use our free BMI calculator above to check your personal BMI instantly based on your exact height and weight, or read on for NHS guidance on healthy weight ranges.
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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 by Height
At 57.2 kg, whether you're in a healthy weight range depends on your height. Here are three concrete examples:
- At 5ft 0in (152cm): 57.2 kg gives a BMI of 24.8 — within the healthy weight range (18.5–24.9).
- At 5ft 4in (163cm): 57.2 kg gives a BMI of 21.5 — comfortably in the healthy weight range.
- At 5ft 8in (173cm): 57.2 kg gives a BMI of 19.1 — well within healthy weight for this height.
To convert kilograms to stone and pounds, divide by 6.35 — so 57.2 kg ÷ 6.35 = 9 stone 0.1 lbs. The NHS healthy weight BMI range is 18.5–24.9 for most adults. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply (18.5–22.9), as these groups face higher health risks at the same BMI. Use our weight converter to check your weight in different units.
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.
NHS Guidance and Next Steps
Waist measurement also matters. The NHS recommends checking your waist circumference alongside BMI. For men, a waist over 94cm (37in) indicates increased health risk; for women, over 80cm (31.5in) is increased risk. If your BMI is in the healthy range but you're concerned about your health, speak to your GP. They can assess your individual circumstances, family history, and any weight-related health conditions. Weight is influenced by many factors — genetics, medical conditions, medications, and lifestyle all play a role. If you're outside the healthy weight range, even modest weight loss of 5–10% can improve health outcomes.
- 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 57.2 kg in pounds exactly?
57.2 kg equals 126.1 pounds (lbs). In UK stone and pounds, this is 9 stone and 0.1 pounds. You can use our free weight converter above to switch between kg, stone, and lbs instantly for any weight.
Is 57.2 kg a healthy weight for an adult?
It depends on your height. At 5ft 0in, 57.2 kg is healthy (BMI 24.8). At 5ft 4in, it's also healthy (BMI 21.5). At 5ft 8in, it's well within range (BMI 19.1). Use our BMI calculator to check your personal BMI based on your height.
What's the healthy weight range for my height?
The NHS healthy BMI range is 18.5–24.9. To find your healthy weight range, multiply 18.5 × your height in metres squared for the lower bound, and 24.9 × height² for the upper bound. Your GP can also advise on healthy weight for your individual circumstances.
What if my BMI is outside the healthy range?
If your BMI is above 25, lifestyle changes including a balanced diet and regular physical activity are recommended first. Your GP can discuss options and, if appropriate, refer you to NHS weight management services. Even small weight loss improves health.
Does waist measurement matter as much as BMI?
Yes. The NHS recommends checking both. Waist measurement indicates where fat is stored, which affects health risk independently of BMI. For men, over 94cm is increased risk; for women, over 80cm. Your GP can explain what these measurements mean for you personally.
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.