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 To Pounds — What's Your BMI?
57.2 kilograms equals 126.1 pounds — a weight that could fall into several different NHS BMI categories depending on your height. Whether this is a healthy weight for you depends entirely on how tall you are. Using our free BMI calculator above, you can discover your exact BMI instantly by entering your height. This guide shows what BMI this weight gives at common UK heights, which NHS category you fall into, and what that means for your health.
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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.
BMI at Different Heights for 57.2 Kg
57.2 kg produces different BMI values depending on your height. Here's what your BMI would be at six common heights, using the NHS BMI formula (weight in kg ÷ height in metres squared):
- 160 cm (5ft 3in): BMI 22.3 — Healthy weight (NHS category)
- 165 cm (5ft 5in): BMI 21.0 — Healthy weight
- 170 cm (5ft 7in): BMI 19.8 — Healthy weight
- 173 cm (5ft 8in): BMI 19.1 — Healthy weight
- 175 cm (5ft 9in): BMI 18.7 — Healthy weight
- 180 cm (5ft 11in): BMI 17.6 — Underweight
At most typical UK adult heights, 57.2 kg sits comfortably within the healthy weight range. If you're taller than 180 cm, this weight may fall into the underweight category. Try our free weight converter to switch between kg, stone, and pounds instantly.
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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.
NHS BMI Categories & What They Mean
The NHS uses these BMI ranges for adults:
- Below 18.5: Underweight
- 18.5–24.9: Healthy weight
- 25.0–29.9: Overweight
- 30.0 and above: Obese
For adults of South Asian, Chinese, Black African, or Black Caribbean backgrounds, the NHS recommends lower thresholds (healthy weight: 18.5–22.9; overweight: 23.0–27.4). BMI has limitations — it doesn't distinguish muscle from fat, and it doesn't account for where weight is carried. Your GP can discuss what BMI means for your individual health, especially if you have existing health conditions or concerns.
- 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 does 57.2 kg equal in pounds?
57.2 kg equals 126.1 pounds. To convert kilograms to pounds, multiply by 2.20462. This weight in stone and pounds is approximately 8 stone 12 pounds (8st 12lbs).
Is 57.2 kg a healthy weight?
Whether 57.2 kg is healthy depends on your height. At most typical adult heights (160–178 cm), it falls in the healthy BMI range. Use our free BMI calculator above to enter your height and see your exact BMI category instantly.
What is the stone equivalent of 57.2 kg?
57.2 kg equals approximately 8 stone 12 pounds. To convert kg to stone using the standard metric to imperial weight conversion, divide by 6.35029. This is the UK's traditional weight measurement system.
How does 57.2 kg compare to average UK adult weight?
The ONS reports average UK adult woman weight is around 71.6 kg (11st 3lbs) and average man weight is around 85.7 kg (13st 7lbs). 57.2 kg is below both averages, which is typical for lighter or shorter adults. Individual healthy weights vary greatly.
Can I use BMI to assess my health at this weight?
BMI is a useful screening tool but has limitations — it doesn't account for muscle mass, body composition, or where fat is stored. It's more accurate for average-build adults than very muscular individuals. Your GP can provide personalised health guidance based on your full health picture.
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.