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 kilos in stones and pounds?
57 kilograms is equal to 8 stone and 13.2 pounds. To convert kilograms to stone, divide by 6.35029 — this is the standard metric to imperial weight conversion used across the UK. Whether you're checking a medical measurement, comparing weight in different units, or simply curious about your weight in stone and pounds, understanding how to convert between metric and imperial systems is useful. Use our free weight converter above to instantly switch between kg, stone, and lbs for any weight value.
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.
How to convert 57kg to stone and pounds
The conversion formula is straightforward: divide kilograms by 6.35029 to get stone. For 57kg, this gives you 8.98 stone. To express this as stone and pounds, multiply the decimal portion (0.98) by 14 (since 1 stone = 14 pounds exactly), giving you 13.2 pounds.
So: 57kg = 8 stone 13.2 lbs
Here's a quick reference table showing weights near 57kg in different units:
- 52kg = 8st 2.6lbs
- 54kg = 8st 7.9lbs
- 56kg = 8st 13.1lbs
- 57kg = 8st 13.2lbs
- 58kg = 9st 1.4lbs
- 60kg = 9st 6.4lbs
- 62kg = 9st 11.6lbs
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.
Is 57kg a healthy weight for adults?
Whether 57kg is healthy depends on your height. At 57kg, your BMI ranges from approximately 19.8 (at 5ft 8in / 173cm) to 24.6 (at 5ft 2in / 158cm) — both falling within the NHS healthy weight range of 18.5 to 24.9. However, if you're taller than 5ft 11in (180cm), 57kg may fall below the healthy range and could indicate being underweight. Use our free BMI calculator above to check your personal BMI using your actual height and weight. Your GP can provide personalised guidance about whether this weight is right for your individual health profile.
- 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 57kg to pounds only?
Multiply 57 by 2.20462. This gives 125.5 pounds (lbs). Pounds are useful for some applications, but UK adults typically use stone and pounds combined for body weight (8 stone 13.2 lbs is more common than 125.5 lbs alone).
What does 57kg mean in terms of BMI?
At 57kg, your BMI depends on your height. At average UK female height (5ft 3.5in / 161cm), 57kg gives a BMI of approximately 22, which is in the healthy weight range. Use our BMI calculator to check your personal BMI.
Is 57kg overweight or underweight?
57kg is neither inherently overweight nor underweight — it depends entirely on your height. For most adults between 5ft 2in and 5ft 11in, 57kg falls within the NHS healthy weight range. Taller individuals may find it slightly low; shorter individuals may find it slightly high.
How do I use the weight converter for other values?
Our free weight converter tool on this page lets you instantly convert any weight between kg, stone, and pounds. Simply enter your weight in one unit and see the conversions appear immediately — no a UK pharmacy calculations needed.
What's the easiest way to convert kg to stone?
The simplest method is to divide kilograms by 6.35029 to get stone. For approximate conversions, divide by 6.35 mentally. For exact results, use our free weight converter above.
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.