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 Kg in Stones — Instant Conversion & Health Context
57 kilograms equals 8 stone and 12.6 pounds using the standard kg to stone conversion formula. If you're tracking your weight in UK measurements, this guide explains exactly what 57kg means in stones and pounds, plus how it fits into NHS healthy weight ranges. Use our free weight converter above to switch between metric and imperial units instantly, or read on for the full breakdown including BMI context at common UK heights.
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.
57 Kg to Stone Conversion — The Complete Breakdown
57 kg = 8 stone 12.6 pounds (8st 12.6lbs)
To convert kilograms to stone, divide the weight by 6.35029. So 57 ÷ 6.35029 = 8.986 stone. Converting this to stones and lbs: 8 whole stone (which equals 112 pounds) plus 0.986 × 14 = 13.8 pounds, totalling 8 stone 12.6 pounds.
- Quick reference: Use our weight converter on this page to convert between kg, stone, and lbs instantly
- Metric to imperial: This conversion works for any weight — divide by 6.35029 to get stones, or multiply by 2.20462 for total pounds
- Nearby values: 55kg = 8st 9.6lbs | 56kg = 8st 11.2lbs | 58kg = 9st 2.0lbs | 59kg = 9st 3.6lbs
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 57 Kg a Healthy Weight? — NHS BMI Context
Whether 57kg is healthy depends entirely on your height. At average UK female height (161.6cm / 5ft 3in), 57kg gives a BMI of approximately 21.9 — comfortably in the healthy weight range (18.5–24.9). At 5ft 6in (168cm), BMI would be around 20.2. At 5ft, BMI would be approximately 24.9 — still healthy.
Use our free BMI calculator above to check your exact BMI at your height. Remember that BMI is a screening tool only — it doesn't account for muscle mass or where fat is stored. Your GP can discuss what a healthy weight means for your individual health.
- 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 stones manually?
Divide 57 by 6.35029 to get 8.986 stone. To express this as stones and pounds: 8 whole stone plus (0.986 × 14) = 8 stone 12.6 pounds. Our weight converter above does this instantly — just enter the value and select your units.
Is 57kg overweight or underweight in the UK?
At average UK female height (5ft 3in), 57kg gives a BMI of about 21.9 — healthy weight. At taller heights, it may be slightly lower. At shorter heights, it may be slightly higher. BMI depends on both weight and height. Use our BMI calculator to check your personal BMI.
What's the healthy weight range for someone at my height if I weigh 57kg?
The healthy BMI range is 18.5–24.9. At 5ft 6in (168cm), healthy weight is roughly 48–71kg. At 5ft 3in (160cm), it's roughly 47–67kg. At 5ft 10in (178cm), it's roughly 56–84kg. Our BMI calculator shows your exact healthy weight range.
How many pounds is 57 kilograms?
57 kilograms equals 125.7 pounds (57 × 2.20462). In UK measurements, this is also expressed as 8 stone 12.6 pounds. Use the weight converter on this page to switch between all three units instantly.
Can I use this conversion for other weights?
Yes. The formula works for any weight: divide by 6.35029 for stones, or multiply by 2.20462 for pounds. Our weight converter handles any kg value — just enter your weight and select your preferred units.
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.