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 17.4kg in Stone?
17.4kg is equal to 2 stone and 10.2 pounds (2st 10.2lbs). This is a straightforward kilogram to stone conversion using the standard UK weight measurement system. Understanding how to convert kilograms to stone is useful for health tracking, especially when reading NHS guidance or monitoring your weight against UK health recommendations. Our free weight converter on this page lets you switch between metric and imperial measurements instantly. If you're checking this weight against health guidelines, our BMI calculator can show you where this weight sits for your height and age.
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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.
Converting 17.4kg to Stone and Pounds
To convert 17.4kg to stone, divide the kilogram amount by 6.35029, the standard conversion factor. This gives you 2.74 stone, which breaks down into 2 full stone and 10.2 pounds.
- 17.4kg = 2 stone 10.2 pounds (2st 10.2lbs)
- Formula: kg ÷ 6.35029 = stone
- Or multiply kg by 2.20462 for pounds: 17.4kg × 2.20462 = 38.4 lbs
- Stone to kg reversal: 2.74 stone × 6.35029 = 17.4kg
This weight conversion is consistent across all UK health services, NHS measurements, and weight tracking systems. Whether you're reading a clinical result or monitoring your own weight, understanding stone and pounds alongside kilogram equivalents helps you track progress accurately using measurements familiar to UK adults.
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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.
17.4kg in Context — Health and BMI
At 17.4kg, a person's health status depends entirely on their height, age, and body composition. For an average UK adult woman (around 161cm or 5ft 3in), this weight would result in a BMI well below the healthy range. For an average UK adult man (around 175cm or 5ft 9in), this weight would also fall significantly below healthy weight ranges.
- 17.4kg is typical for a child aged 4–7 years, not an adult
- For adults, this weight would indicate being severely underweight
- If you're an adult at this weight, consulting your GP is important to understand your health
Use our free BMI calculator above to check your personal BMI at your specific height. This will show you exactly where your weight sits against NHS healthy weight guidelines and help identify any health considerations worth discussing with your GP.
- 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 17.4kg to stone manually?
Divide 17.4 by 6.35029 to get 2.74 stone. To convert the decimal into pounds, multiply 0.74 by 14 (pounds per stone) to get 10.36 pounds, which rounds to 10.2lbs. So 17.4kg = 2 stone 10.2 pounds.
What is the formula for kilogram to stone conversion?
The standard conversion formula is: kilograms ÷ 6.35029 = stone. For kilograms to pounds, multiply by 2.20462. These conversion factors are used across NHS systems and UK health services.
Is 17.4kg a healthy weight for an adult?
At 17.4kg, this weight is significantly below the healthy range for any adult and would indicate severe underweight status. This weight is typical for a young child. Adults at this weight should speak to their GP to understand any underlying health factors.
How does 17.4kg compare to average UK adult weight?
The average UK adult woman weighs around 71.6kg (11st 3lbs), and the average UK adult man weighs around 85.7kg (13st 7lbs). At 17.4kg, this is about one-fifth of average adult weight, appropriate only for young children.
Can I use a weight converter tool instead of calculating manually?
Yes. Our free weight converter above instantly converts between kg, stone, and pounds. Simply enter your weight and it displays results across all three measurements, saving time and ensuring accuracy for health tracking.
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.