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 57 Kg In Stone?
57 kilograms equals 8 stone and 13.4 pounds in UK measurements. To convert 57kg to stone using standard weight conversion, divide 57 by 6.35029. This weight falls within the healthy weight range for many adults, depending on height, according to NHS guidance. Use our free weight converter above to quickly switch between kg, stone, and pounds for any weight. Understanding your weight in both metric and imperial units is useful when tracking health progress or discussing your weight with your GP.
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.
Converting 57 Kg to Stone Step by Step
To convert 57 kilograms to stone, use the conversion formula: divide 57 by 6.35029. This gives you 8.975 stone, which breaks down into 8 stone and 13.4 pounds (since 1 stone = 14 pounds exactly).
- 57 kg = 8 stone 13.4 lbs
- 57 kg = 125.7 pounds (in imperial lbs)
- Exact conversion: 8.975 stone
This UK weight converter approach works for any weight — multiply by 2.20462 to convert kg to pounds, or divide by 6.35029 to convert kg to stone. Whether you're tracking weight for health reasons or checking measurement units, having both metric and imperial measurements helps you understand your weight in familiar UK terms. Our free weight converter on this page lets you convert any weight instantly between all three units.
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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.
Is 57 Kg a Healthy Weight?
Whether 57 kg is a healthy weight depends on your height and age. According to NHS guidance, the healthy weight range is indicated by a BMI (Body Mass Index) between 18.5 and 24.9. For example, if you are 165 cm (5ft 5in) tall, a weight of 57 kg gives a BMI of approximately 20.9 — which falls comfortably in the healthy range. However, if you are significantly taller or shorter, your BMI may differ. Calculate your personal BMI using our free BMI calculator above to see where your weight falls on the NHS healthy weight scale. Your GP can also provide personalised advice about whether 57 kg is appropriate for your individual circumstances.
- 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.
How do I convert 57 kg to stone quickly?
Divide 57 by 6.35029 to get 8.975 stone, which equals 8 stone and 13.4 pounds. Use our free weight converter above for instant conversions between kg, stone, and pounds without needing to calculate manually.
Is 57 kg considered overweight in the UK?
It depends on your height. A weight of 57 kg is not automatically overweight — your BMI determines whether it's in the healthy, overweight, or obese range. Use our free BMI calculator to check your personal BMI instantly and see where you fall on NHS health guidelines.
What is the healthy weight range for someone who weighs 57 kg?
The healthy weight range varies by height. If you're 165 cm tall, 57 kg is in the healthy range (BMI ~20.9). If you're taller, you may have room to gain weight healthily; if shorter, you might be at the higher end of healthy. Your GP can advise on what's healthy for you personally.
How does 57 kg compare to the average UK adult weight?
The average UK adult woman weighs approximately 71.6 kg (11st 3lbs), and the average UK adult man weighs approximately 85.7 kg (13st 7lbs). At 57 kg (8st 13lbs), you would be below average, though healthy weight varies significantly by height and individual factors.
Can I use a weight converter for health tracking?
Yes. Converting between kg, stone, and pounds helps you track weight consistently, especially if different scales or GP surgeries use different units. Our weight converter and BMI calculator work together to give you full UK health context for your weight measurements.
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.