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
11.5 Pounds in Kilograms — Instant Conversion
11.5 pounds is equal to approximately 5.22 kg. This is a straightforward conversion using the standard pound to kilogram ratio of 0.453592. Whether you're checking a baby's weight, a small package, or tracking progress with UK health measurements, converting between pounds and kilograms is quick and simple. Our free weight converter above lets you instantly switch between metric and imperial units. For context on healthy weight ranges in both measurements, see the reference table and BMI information below.
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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.
Pound to Kilogram Conversion Formula
To convert 11.5 pounds to kg, multiply by the conversion factor 0.453592. The calculation is straightforward: 11.5 lbs × 0.453592 = 5.22 kg. This precise conversion works for any pound to kilogram calculation—simply multiply the number of pounds by 0.453592. Conversely, to convert kg to stone and pounds, divide the kilogram value by 6.35029. The weight converter on this page performs these calculations instantly, making it easy to switch between metric and imperial measurements without a UK pharmacy maths. Use our free tool above to convert any weight value in seconds.
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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.
11.5 Pounds in UK Health Context
At 11.5 kg (5.22 lbs), this weight is typically associated with a young child or newborn—not an adult body weight. For adults, this weight would be severely underweight and would require medical attention. If you're converting an adult's weight, the value may be a partial measurement or a data entry correction. For adults seeking to understand their healthy weight range, use our free BMI calculator above to check your BMI at your actual height and weight. The NHS healthy weight range for adults varies significantly by height, so personalised assessment through your GP is important if you have weight concerns.
- 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 11.5 pounds in kilograms exactly?
11.5 pounds equals 5.22 kilograms (5.216 kg to be precise). This uses the standard conversion factor of 0.453592 kg per pound, which is the internationally accepted ratio for converting imperial to metric weight measurements.
How do I convert pounds to kg without a calculator?
Multiply the pound value by 0.453592. For example, 11.5 × 0.453592 = 5.22 kg. For rough mental maths, use 0.45 as a simpler multiplier. Our weight converter on this page does this instantly for any value.
Is 11.5 kg a healthy weight for an adult?
No—11.5 kg is far below a healthy weight for any adult. This weight is typical for a small child or newborn only. Adults with this weight would require urgent medical assessment. Use our BMI calculator to check your personalised healthy weight range for your height.
What's the difference between pounds and kilograms?
Pounds and kilograms are both units of weight. Kilograms are the metric standard used by the NHS and most of the world. Pounds are part of the imperial system used in the UK colloquially. One kilogram equals 2.20462 pounds, making kg to stone conversion a common UK measurement task.
Can I use this conversion for baby weight?
Yes—11.5 kg is a typical weight for a toddler or young child (approximately 2–3 years old, depending on growth). Healthcare professionals in the UK may record child weight in both kg and pounds. Always discuss your child's growth with your health visitor or GP to ensure they're developing healthily.
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.