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 46kg In Stone?
46kg is equivalent to 7 stone and 3.2 pounds (7st 3.2lbs) in UK measurements. If you're converting your weight between metric and imperial units, understanding this conversion is straightforward using the standard conversion rate of 6.35029kg per stone. For context within UK health guidance, 46kg falls into the underweight category for most adults, though healthy weight ranges vary depending on your height and individual health factors. Use our free weight converter above to check conversions between kg, stone, and pounds instantly.
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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.
How To Convert 46kg To Stone
To convert 46kg to stone, divide the kilogram value by 6.35029. For 46kg: 46 ÷ 6.35029 = 7.25 stone. To express this in stone and pounds, take the decimal (0.25) and multiply by 14 (since 1 stone = 14 pounds): 0.25 × 14 = 3.2 pounds. Therefore, 46kg = 7 stone 3.2 pounds.
This conversion works the same way for any kilogram value. The UK primarily uses stone and pounds for body weight, whilst clinical health measurements often use kilograms. Our free weight converter makes this process instant — simply enter 46kg and switch between units to see all conversions at once.
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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.
46kg In Context — Healthy Weight And BMI
Whether 46kg is a healthy weight depends entirely on your height. For example, at 5ft 4in (163cm), a weight of 46kg gives a BMI of approximately 18.6, which falls within the NHS healthy weight range of 18.5–24.9. However, at 5ft 8in (173cm), 46kg would result in a BMI of around 15.4, which is classified as underweight. Calculate your personal BMI using our free BMI calculator above to understand whether your weight falls within a healthy range for your specific height. If you have concerns about being underweight, your GP can offer personalised health guidance.
- 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 46kg underweight for an adult?
Whether 46kg is underweight depends on your height. It's underweight for someone 5ft 8in or taller, but may be healthy for shorter adults. Use our BMI calculator to check your personal BMI range. If concerned, speak to your GP for personalised advice.
How do I convert 46kg to stone quickly?
Divide 46 by 6.35029 to get stone (7.25), then multiply the decimal by 14 for pounds (0.25 × 14 = 3.2lbs). So 46kg = 7st 3.2lbs. Our weight converter above does this instantly.
What is the healthy weight range for my height if I'm 46kg?
Healthy weight depends on height. Use our free BMI calculator to find your healthy weight range. For example, at 5ft 4in, 46kg is healthy; at 5ft 10in, it may be underweight. Your GP can provide personalised guidance.
Why does the UK use stone instead of kilograms?
The UK traditionally uses stone and pounds for body weight, whilst kilograms are used in clinical healthcare settings and across most of Europe. Both are valid — MyWeightCheck supports both measurements so you can use whichever feels most natural.
Is 46kg a safe weight for weight loss medication like Mounjaro or Wegovy?
Weight loss medications like Mounjaro and Wegovy are typically prescribed for adults with a BMI of 30 or above, or 27+ with weight-related conditions. At 46kg, most adults would not be eligible. Speak to your GP or a registered prescriber for personalised advice about whether any treatment is appropriate for you. ```
Ready to take control of your weight loss journey?
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