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 converts to 7 stone and 3.4 pounds (7st 3.4lbs) using the standard UK weight conversion. This weight is well below the average UK adult weight and falls into the healthy weight category for most adult heights. Understanding your weight in UK measurements alongside your height and BMI helps you get a full picture of your health status. Use our free weight converter to switch between kilograms, stone, and pounds instantly, and check where your weight sits within NHS health guidance thresholds.
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.
46kg in UK Measurements and Context
46kg conversion:
- 46kg = 7 stone 3.4 pounds (7st 3.4lbs)
- 46kg = 101.4 pounds (lbs)
At 46kg, your weight is significantly below the UK average for adults. According to NHS health information, whether this weight is healthy for you depends entirely on your height and individual circumstances. For example, at 5ft 2in (157cm), a BMI of 46kg would fall into the healthy weight range; at 5ft 10in (178cm), it would fall into the underweight category. BMI is a useful health screening tool, though it has limitations — it does not account for muscle mass, where fat is stored, or individual health factors. Calculate your personal BMI now using our free BMI calculator above to see the full health context for your specific height and weight.
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.
Health Context for 46kg Weight
At 46kg, your weight suggests either a smaller adult frame or younger age. The NHS recommends that all adults maintain a weight within the healthy BMI range of 18.5 to 24.9 — though ethnicity affects these thresholds. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends a healthy BMI range of 18.5 to 22.9, reflecting higher health risks at the same BMI levels for these populations. If you have concerns about whether 46kg is healthy for your height, speak with your GP, who can give you personalised health advice based on your full health picture. Track your weight over time using our free progress tracker to monitor your health journey and spot any patterns worth discussing with your healthcare provider.
- 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 a healthy weight in the UK?
Whether 46kg is healthy depends on your height. Use the BMI calculator on this page to find your personal BMI. For most adult heights, 46kg falls into either the healthy or underweight BMI range. Your GP can give you personalised health advice.
How do I convert 46kg to stone?
46kg equals 7 stone and 3.4 pounds (7st 3.4lbs). You can also use our free weight converter above to instantly switch between kilograms, stone, and pounds for any weight.
What is the average UK adult weight?
The average UK adult man weighs approximately 85.7kg (13st 7lbs), and the average UK adult woman weighs approximately 71.6kg (11st 3lbs). At 46kg, you are below these averages.
What does BMI tell me about 46kg?
BMI is calculated using your height and weight together. At 46kg, your BMI will differ significantly depending on your height. BMI is useful but has limitations — it does not account for muscle mass or fat distribution.
Should I be concerned about weighing 46kg?
Not necessarily. Weight is just one health marker. If you have concerns, speak with your GP. They can assess your overall health picture including nutrition, activity level, health conditions, and family history. Your GP can give you personalised health advice.
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.