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's 23.5 Pounds in Kg and Your BMI?
23.5 pounds converts to 10.66 kilograms — a relatively light weight that falls into different NHS BMI categories depending on your height. Your BMI is a useful screening tool to understand where your weight sits within NHS healthy weight ranges, though it's important to remember that BMI doesn't account for muscle mass or body composition. Use our free BMI calculator above to find your exact BMI instantly by entering your height and weight. Understanding your BMI helps you get context around your weight and identify whether any health conversations with your GP might be helpful.
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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.
BMI at Different Heights for 23.5 Pounds (10.66kg)
At 23.5 pounds (10.66 kg), your BMI varies significantly depending on your height. Here are approximate BMI values at common UK heights:
- 5ft 2in (158cm): BMI 3.8 — dangerously underweight
- 5ft 5in (165cm): BMI 3.5 — dangerously underweight
- 5ft 8in (173cm): BMI 3.2 — dangerously underweight
- 5ft 10in (178cm): BMI 3.0 — dangerously underweight
- 6ft 0in (183cm): BMI 2.8 — dangerously underweight
At any typical adult height, 23.5 pounds is far below a healthy weight range. This weight would only be appropriate for a very young child. If you're an adult weighing this amount, it's essential to speak with your GP urgently, as it indicates severe malnutrition or an underlying health condition requiring medical attention.
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.
NHS BMI Categories and What They Mean
The NHS defines healthy BMI ranges for adults as 18.5 to 24.9, which corresponds to a healthy weight for your height. BMI is calculated as weight in kilograms divided by height in metres squared, giving a quick screening indicator of whether your weight is within a healthy range.
However, BMI has important limitations: it doesn't distinguish between muscle and fat, so athletes may have a high BMI despite low body fat. BMI also doesn't account for where fat is stored on your body — waist circumference matters too. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds due to higher health risks at the same BMI level.
Use our free weight converter to switch between kg, stone, and pounds as you track your health metrics.
- 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 does 23.5 pounds equal in kilograms?
23.5 pounds equals 10.66 kilograms exactly. To convert pounds to kg, divide the pound value by 2.20462. This conversion is useful when checking UK health records or NHS weight charts, which typically use kilograms as the standard measurement unit.
Is 23.5 pounds a healthy weight for an adult?
No. At 23.5 pounds (10.66 kg), this weight is dangerously low for any adult and indicates severe underweight status at any realistic height. This weight would only be appropriate for a newborn or very young infant. Adults at this weight should seek urgent medical attention from their GP to rule out serious health conditions.
How do I calculate my BMI if I weigh 23.5 pounds?
Use our free BMI calculator on this page — simply enter your height and weight. BMI is calculated as weight (kg) divided by height (metres) squared. For 23.5 pounds at typical adult heights, the resulting BMI would indicate severe underweight status requiring medical support.
What is a healthy weight range in pounds and kilograms?
For adults, a healthy BMI (18.5–24.9) typically corresponds to weights that vary significantly by height. For example, at 5ft 8in, a healthy weight range is approximately 122–164 pounds (55–74 kg). Use our free weight converter and BMI calculator to find your personal healthy weight range based on your height.
Why does BMI change based on height?
BMI accounts for height because taller people can weigh more while maintaining the same body fat percentage. The BMI formula divides weight by height squared, so the same weight produces very different BMI values depending on how tall you are. This is why 70kg is healthy for a tall person but overweight for a shorter person.
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.