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
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What is 9.4 lbs in Kilograms?
9.4 lbs is equal to approximately 4.26 kg. This conversion uses the standard metric formula where 1 pound equals 0.453592 kilograms. Whether you're checking infant weight, tracking small portions, or converting metric to imperial weight measurements for health purposes, understanding how to convert pounds to kilograms is useful in the UK where healthcare professionals use both systems. Use our free weight converter above to switch between kg and stone instantly, and try the BMI calculator to see how weight relates to your personal health metrics.
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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.
9.4 Pounds to Kilograms Conversion Table
Here are conversions of 9.4 lbs alongside nearby weights for quick reference:
- 7.4 lbs = 3.36 kg
- 8.4 lbs = 3.81 kg
- 9.4 lbs = 4.26 kg
- 10.4 lbs = 4.72 kg
- 11.4 lbs = 5.17 kg
To calculate this conversion yourself, multiply the weight in pounds by 0.453592. So: 9.4 × 0.453592 = 4.26 kg. You can also divide kilograms by 2.20462 to convert back to pounds. These conversions work for any weight in stones and lbs, kilos in stone, or pounds and ounces — simply apply the same formula.
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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.
BMI and Health Context at 9.4 Lbs
At 9.4 lbs (4.26 kg), this weight is typically associated with newborn infants or very small objects rather than adult health metrics. For adults, healthy weight assessment uses BMI, which combines weight with height. A very small weight like 4.26 kg would give an extremely low BMI at any adult height, well below the NHS healthy range of 18.5–24.9. If you're tracking infant weight, NHS guidelines use age-specific centile charts rather than BMI. For adult weight assessment, calculate your BMI using the free tool on this page, which works across metric to imperial weight measurements and provides NHS-aligned guidance for your personal health.
- 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.
How do I convert 9.4 lbs to kg?
Multiply 9.4 by 0.453592. The result is 4.26 kg. Alternatively, divide by 2.20462 to reverse the conversion. This formula works for converting any weight from pounds to kilograms or kilos in stone measurements.
Is 9.4 lbs a healthy weight for an adult?
At 9.4 lbs (4.26 kg), this weight is far below the healthy range for any adult. Healthy adult weight depends on height and is assessed using BMI. Use the free BMI calculator on this page to find your personal healthy weight range based on your height.
What does 9.4 lbs equal in stone?
9.4 lbs equals 0.67 stone (or just under 11 ounces when expressed as stone and pounds). In UK measurements, weights are often expressed as stone and pounds — for example, 11 stone 9.4 lbs would be written as 11st 9.4lbs.
Why does the UK use both kg and stone for weight?
The NHS uses kilograms for clinical measurements, but many UK adults prefer stone and pounds in everyday life. The weight converter on this page helps switch between all systems — kilograms, stone, and pounds — instantly for both metric and imperial measurements.
Can I use this conversion for baby weight tracking?
Yes, but infant weight is typically tracked using age-specific NHS centile charts rather than BMI. Your health visitor or GP will use these charts to assess whether your baby's weight is healthy for their age, rather than standalone conversions.
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.