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 49kg in Stone?
49kg is equivalent to 7 stone and 10.8 pounds in UK measurements. Whether you're tracking your weight, comparing health metrics, or following NHS guidance, understanding your weight in familiar UK units helps you make informed health decisions. Our free weight converter lets you instantly switch between kilograms, stone, and pounds — but context matters. A healthy weight depends on your height, age, and individual health circumstances, which is why the NHS recommends using BMI alongside other measurements to understand your overall health picture.
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.
49kg to Stone — Quick Conversion
49kg converts to 7 stone 10.8 pounds (7st 10.8lbs) using the standard UK conversion formula.
- Calculation: 49kg ÷ 6.35029 = 7.72 stone
- In stone and pounds: 7 stone + (0.72 × 14 pounds) = 7st 10.8lbs
- In pounds only: 49kg × 2.20462 = 108.0 lbs
Use our free weight converter above to check other weights instantly. This conversion is exact — 49kg remains 49kg whether measured in the UK, Europe, or anywhere else using metric measurements. The difference is simply how we express the same weight in familiar units.
Is 49kg a Healthy Weight in the UK?
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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.
Whether 49kg is healthy depends entirely on your height. The NHS uses BMI (Body Mass Index) as a screening tool to assess whether a weight is healthy for a given height. BMI is calculated as weight (kg) divided by height (m) squared. For example, 49kg at a height of 163cm (5ft 4in) gives a BMI of approximately 18.5 — at the lower edge of the healthy range (18.5–24.9). The same weight at 150cm (4ft 11in) would give a BMI of approximately 21.8 — comfortably healthy. At 180cm (5ft 11in), a BMI of 15.1 would fall below healthy weight. Calculate your personal BMI now using our free BMI calculator on this page — it takes seconds and gives you an accurate picture of whether 49kg is healthy for your specific height.
The NHS defines a healthy BMI range as 18.5 to 24.9 for most UK adults. However, if you are of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds starting at BMI 18.5–22.9 as healthy, because these groups face higher health risks at higher BMI levels.
- Waist circumference also matters — the NHS recommends measuring your waist as an additional health indicator
- Muscle mass, bone density, and overall fitness cannot be determined by weight alone
- If you have health conditions, your GP may advise a different healthy weight range for you personally
Weight is influenced by many factors including genetics, medical conditions, medications, and lifestyle. Never compare your weight directly to others — focus on your own health metrics and what feels sustainable for you.
- 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 49kg underweight?
Not necessarily. 49kg is underweight only if your height is very tall (around 190cm+). For most UK adults of average height (160–180cm), 49kg falls within or near the healthy weight range. Use our BMI calculator to check your personal healthy weight range.
What is 49kg in stones and pounds exactly?
49kg equals 7 stone and 10.8 pounds (7st 10.8lbs). You can use our free weight converter to instantly convert between kg, stone, and pounds for any weight.
What healthy weight range is recommended for my height if I weigh 49kg?
The NHS healthy BMI range is 18.5–24.9 for most adults. To find your healthy weight range, calculate your BMI using our free BMI calculator on this page — it shows you the exact healthy weight range for your height instantly.
Can I rely on weight alone to check if I'm healthy?
No. Weight is just one health indicator. The NHS recommends also measuring waist circumference and consulting your GP, especially if you have existing health conditions. BMI and waist measurement together give a better picture than weight alone.
Does 49kg mean the same in all countries?
Yes. 49kg is the same weight everywhere — kilogram is the metric unit used worldwide. The difference is how different countries express weight: the UK uses stone and pounds, most of Europe uses kilograms, and the US uses pounds. Our weight converter helps you switch between all three.
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.