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 48 kg in Stone?
48 kg is equivalent to 7 stone and 8.8 pounds (or 7st 8.8lbs) in UK measurements. This conversion uses the standard metric-to-imperial formula: divide kilograms by 6.35029 to get stone. If you're tracking your weight or comparing measurements across different health resources, our free weight converter can help you switch between kg, stone, and pounds instantly. Understanding your weight in familiar UK units makes it easier to track progress and communicate with your GP about health goals.
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 Does 48 kg Compare to Healthy Weight?
Whether 48 kg is a healthy weight depends entirely on your height, age, sex, and ethnicity. The most reliable way to assess this is using your Body Mass Index (BMI). For example, at a height of 163 cm (5ft 4in), 48 kg gives a BMI of 18.0, which falls in the healthy weight range (18.5–24.9 according to NHS guidelines). However, at 180 cm (5ft 11in), 48 kg would give a BMI of 14.8, which is below the healthy range and may indicate underweight status.
- Use our free BMI calculator above to check your personal BMI with your exact height
- For South Asian, Chinese, Black African, or Black Caribbean adults, NHS recommends a healthy BMI of 18.5–22.9
- BMI is a useful screening tool but has limitations — it doesn't account for muscle mass or where fat is stored
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.
Weight Management and Health Support
If you're thinking about weight management, whether that's maintaining, losing, or gaining weight, your GP is the best starting point. They can assess your individual health, discuss any concerns, and refer you to appropriate support — such as NHS weight management services or a registered dietitian. For those looking to lose weight, evidence-based approaches include lifestyle changes (diet and physical activity), structured programmes through the NHS, and in some cases, prescription weight loss medications following clinical assessment.
- Track your weight progress over time using our free progress tracker
- The NHS recommends losing weight at a safe rate of 0.5–1 kg per week
- Even a 5–10% reduction in body weight can have meaningful health benefits
- 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.
Is 48 kg a healthy weight?
Whether 48 kg is healthy depends on your height. Use our free BMI calculator to find your personal BMI — healthy weight range is BMI 18.5–24.9 (NHS guidelines). For specific reassurance, discuss your weight with your GP, who can assess your individual health.
What is 48 kg in stone and pounds exactly?
48 kg equals 7 stone and 8.8 pounds (7st 8.8lbs). Use our weight converter to switch between kg, stone, and pounds instantly, or calculate BMI using your height.
How much weight would I need to gain or lose to reach a healthy BMI?
This depends entirely on your height and current BMI. Use the BMI calculator on this page with your height to see your healthy weight range. Your GP can also help you set realistic, personalised health goals.
What's the difference between BMI and body composition?
BMI is a simple screening tool based on height and weight. Body composition measures fat, muscle, and bone — which BMI doesn't distinguish. Athletes may have high BMI but low body fat. Your GP can discuss whether other measurements are relevant for you.
Where can I get professional weight management support in the UK?
Start with your GP, who can discuss your concerns and refer you to NHS weight management services (tier 1–4), a registered dietitian, or other support. Private weight management options are also available through registered healthcare professionals.
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.