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 17.2 Lb in Kilograms?
17.2 lb is equal to approximately 7.8 kg. This conversion uses the standard metric to imperial weight conversion where 1 kilogram equals 2.20462 pounds. Whether you're checking a food weight, parcel mass, or personal measurement, converting between pounds and kilograms is straightforward once you know the formula. Our free weight converter above lets you instantly convert between kg, stone, and lbs — useful for anyone working with both UK and metric measurements in daily life.
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.
Pounds to Kilograms Conversion Chart
To convert 17.2 lb to kg, divide the pound value by 2.20462. The calculation is: 17.2 ÷ 2.20462 = 7.8 kg (rounded to one decimal place).
Here are nearby conversions to help you find related values:
- 15 lb = 6.8 kg
- 16 lb = 7.3 kg
- 17 lb = 7.7 kg
- 17.2 lb = 7.8 kg
- 18 lb = 8.2 kg
- 19 lb = 8.6 kg
- 20 lb = 9.1 kg
For frequent conversions, use our weight converter tool on this page to switch between pounds, kilograms, and stone instantly.
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.
Is 7.8 Kg a Healthy Weight?
At 7.8 kg (17.2 lb), this weight is far below adult human body weight ranges and would represent a newborn or very young child. For context, UK newborns average 3.5 kg at birth, and by 12 months typically weigh 9-10 kg.
If you're converting food, parcel, or equipment weights, 7.8 kg is perfectly reasonable. For personal body weight assessment, the NHS uses BMI (Body Mass Index) which requires both weight and height. Use our free BMI calculator above to check your healthy weight range based on your individual height and age.
- 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.
Why divide by 2.20462 to convert pounds to kilograms?
Because one kilogram equals exactly 2.20462 pounds. This is the international standard conversion factor. Dividing pounds by this number gives kilograms; multiplying kilograms by it gives pounds. All pound-to-kilogram conversions use this same ratio.
What's the difference between stone and pounds in UK measurements?
Stone and pounds are both imperial units. One stone equals exactly 14 pounds. UK adults typically describe body weight in stone and pounds (e.g., "11 stone 3 pounds"), whilst kilograms are used in clinical settings. You can convert between stone to kg using the standard kg to stone conversion formula, or use our weight converter.
Is 7.8 kg heavy for a newborn?
No—7.8 kg is actually slightly above average birth weight for a UK newborn at around 8 weeks old. At birth, UK babies average 3.5 kg. By 6 months, they typically weigh around 6.5-7.5 kg. Growth rates vary individually, so always consult your health visitor or GP for paediatric weight guidance.
Can I use this conversion for food shopping and parcels?
Absolutely. Whether converting recipe ingredients from American cookbooks, checking parcel weights before posting, or comparing nutritional information, the pound-to-kilogram conversion stays constant at 2.20462. 7.8 kg is approximately 17 pounds, useful for understanding weights on international product labels.
How do I convert multiple weights at once?
Use our free weight converter tool on this page to convert multiple values between pounds, kilograms, and stone instantly. For body weight assessment at UK heights, our BMI calculator combines weight and height to show your healthy weight range according to NHS guidelines.
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.