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 46 Kg In Stone And What Does It Mean For Your BMI?
46 kilograms is equivalent to 7 stone and 4 pounds in UK measurements. However, your BMI — and what this weight means for your health — depends entirely on your height. A person weighing 46kg could have a healthy BMI or fall outside the healthy range depending on how tall they are. Use our free BMI calculator above to find your personal BMI, or read on to see how 46kg converts to BMI at different heights according to NHS guidelines.
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.
46 Kg BMI At Different Heights
Since BMI is calculated as weight divided by height squared, the same weight of 46kg produces very different BMI values depending on your height. Here are examples of what a 46kg weight means for BMI across common UK heights:
- At 150cm (4ft 11in): BMI = 20.5 — healthy weight range
- At 155cm (5ft 1in): BMI = 19.1 — healthy weight range
- At 160cm (5ft 3in): BMI = 18.0 — healthy weight range
- At 165cm (5ft 5in): BMI = 16.9 — underweight according to NHS guidelines
- At 170cm (5ft 7in): BMI = 15.9 — underweight according to NHS guidelines
- At 175cm (5ft 9in): BMI = 15.0 — underweight according to NHS guidelines
Use the weight converter and BMI calculator on this page to check your exact BMI for your height instantly. NHS guidelines state that a healthy BMI is between 18.5 and 24.9 for most adults.
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 NHS BMI Categories And Limitations
The NHS uses standardised BMI categories to assess weight status. A healthy BMI falls between 18.5 and 24.9, whilst BMI below 18.5 is classified as underweight. However, BMI has important limitations — it does not distinguish between muscle and fat, so athletes may have a high BMI despite low body fat. BMI also does not account for where fat is stored; waist circumference matters for health risk. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds due to higher disease risk at lower weights. If you're unsure whether your weight is healthy for you, speak with your GP for personalised 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.
What is 46kg in stone and pounds?
46 kilograms equals 7 stone and 4 pounds (7st 4lbs). To convert kilograms to stone, divide by 6.35. To convert to pounds, multiply by 2.205. Use our weight converter above for instant conversions between kg, stone, and pounds.
Is 46kg a healthy weight?
Whether 46kg is healthy depends entirely on your height and age. At shorter heights (around 150–160cm), 46kg typically falls in the healthy weight range. At taller heights (above 170cm), it would be considered underweight by NHS standards. Calculate your personal BMI using our free BMI calculator to see if 46kg is healthy for you.
What BMI does 46kg give at average UK height?
At the average UK adult height of 175cm (5ft 9in), a weight of 46kg would give a BMI of approximately 15.0, which falls below the NHS healthy weight range (18.5–24.9). This suggests underweight status. However, individual health depends on many factors beyond BMI.
How do I know if 46kg is a healthy weight for me?
Calculate your BMI using your exact height and weight with our free BMI calculator on this page. The NHS healthy BMI range is 18.5–24.9. If your BMI falls outside this range, or if you have health concerns, speak with your GP for personalised advice about what weight is right for you.
Should I use kilograms or stone to track my weight in the UK?
Both are used in the UK. The NHS uses kilograms clinically, but many UK adults prefer stone and pounds personally. Use whichever feels natural to you — our weight converter makes it easy to switch between kg, stone, and pounds instantly.
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.