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 52.9kg in Stone and What's Your BMI?
52.9kg converts to 8 stone 5.4 pounds in UK measurements. However, your BMI depends entirely on your height — the same weight can be a healthy range for a taller person or overweight for someone shorter. Use our free BMI calculator above to find your personal BMI instantly, or read on to see example BMI values at different heights for this weight.
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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 52.9kg — Examples by Height
At 52.9kg, your BMI changes significantly depending on your height. Here are realistic examples:
- 5ft 0in (152cm): BMI = 22.9 — healthy weight (NHS range 18.5–24.9)
- 5ft 2in (157cm): BMI = 21.5 — healthy weight
- 5ft 4in (163cm): BMI = 20.2 — healthy weight
- 5ft 6in (168cm): BMI = 19.0 — healthy weight
- 5ft 8in (173cm): BMI = 18.1 — healthy weight
- 5ft 10in (178cm): BMI = 17.2 — borderline underweight
For most heights, 52.9kg falls comfortably within the NHS healthy weight range. If you're taller than 5ft 10in, your GP or healthcare professional may want to discuss your weight. Use the weight converter on this page to see 52.9kg in different units — stone, pounds, or kilograms — and compare against your personal BMI using our free calculator.
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.
Understanding Your BMI Category
NHS BMI Categories for Adults: A BMI below 18.5 is underweight; 18.5–24.9 is healthy weight; 25–29.9 is overweight; and 30 or above is obese. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — healthy weight starts at 18.5 and ends at 22.9. Important limitation: BMI does not account for muscle mass, so athletes or very muscular individuals may have a high BMI but low body fat. Waist circumference and overall health markers matter too. Your GP can provide personalised guidance based on your individual health picture, not BMI alone.
- 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 52.9kg in stone and pounds?
52.9kg equals 8 stone and 5.4 pounds (or approximately 8st 5lb). To convert kilograms to stone, divide by 6.35. This conversion helps UK adults understand their weight using familiar measurements instead of kilos.
Is 52.9kg a healthy weight for me?
That depends on your height. At 52.9kg, most people between 5ft 0in and 5ft 8in will have a BMI in the healthy range (18.5–24.9). Use our free BMI calculator above to check your personal BMI instantly based on your exact height.
What height makes 52.9kg underweight?
At heights above approximately 5ft 10in (178cm), a weight of 52.9kg may fall into the underweight category (BMI below 18.5). If you're very tall and concerned about your weight, discuss this with your GP for personalised advice.
How do I convert kg to stone accurately?
Divide kilograms by 6.35029 to get stone. For example: 52.9kg ÷ 6.35 = 8.34 stone. Use our free weight converter on this page to convert instantly between kg, stone, and pounds without a UK pharmacy calculation.
Should I aim for a specific weight at my height?
Rather than targeting one exact weight, the NHS recommends aiming for a healthy BMI range (18.5–24.9 for most adults; 18.5–22.9 for South Asian or Black African heritage). This range accounts for different body compositions and muscle mass. Your GP can discuss what's healthy 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.